Automatic Impedance Matching for MHz NFC Antennas
|
|
|
- Quentin Flynn
- 9 years ago
- Views:
Transcription
1 Automatic Impedance Matching for MHz NFC Antennas Michael Roland 1, Harald Witschnig 2, Erich Merlin 2, Christian Saminger 1 1 Upper Austria University of Applied Sciences, Hagenberg, Austria 2 NXP Semiconductors, Gratkorn, Austria 6 th Symposium on Communication Systems, Networks and Digital Signal Processing, 2008 Roland, Witschnig, Merlin, Saminger Automatic Impedance Matching CSNDSP08 1 / 24
2 Outline 1 Overview of the NFC Research Lab 2 Motivation NFC Equipment and its Antennas Impedance Matching 3 Automatic Impedance Matching Automatic Tuning System Matching Circuit Controller Results 4 Summary and Outlook Roland, Witschnig, Merlin, Saminger Automatic Impedance Matching CSNDSP08 2 / 24
3 Overview of the NFC Research Lab NFC Research Lab Part of the R&D department of the Upper Austria University of Applied Sciences Funded by the BMVIT (Federal Ministry for Transport, Innovation and Technology) and FFG (Austrian Research Promotion Agency) We are focusing on NFC hardware development interoperability and performance testing for NFC systems implementation of NFC applications secure aspects for NFC systems and applications 1st Austrian NFC Trial Annual NFC Congress in Hagenberg Roland, Witschnig, Merlin, Saminger Automatic Impedance Matching CSNDSP08 3 / 24
4 Outline Motivation NFC Equipment and its Antennas 1 Overview of the NFC Research Lab 2 Motivation NFC Equipment and its Antennas Impedance Matching 3 Automatic Impedance Matching Automatic Tuning System Matching Circuit Controller Results 4 Summary and Outlook Roland, Witschnig, Merlin, Saminger Automatic Impedance Matching CSNDSP08 4 / 24
5 Motivation NFC Equipment and its Antennas NFC Equipment and its Antennas NFC transmission module IC has external antenna Mobile devices have though space-saving requirements Non-standard antennas necessary to fit casings antennas have varying characteristics (shape, impedance) each antenna has a certain impedance measured at its clamps Roland, Witschnig, Merlin, Saminger Automatic Impedance Matching CSNDSP08 5 / 24
6 Outline Motivation Impedance Matching 1 Overview of the NFC Research Lab 2 Motivation NFC Equipment and its Antennas Impedance Matching 3 Automatic Impedance Matching Automatic Tuning System Matching Circuit Controller Results 4 Summary and Outlook Roland, Witschnig, Merlin, Saminger Automatic Impedance Matching CSNDSP08 6 / 24
7 Motivation Impedance Matching What is Impedance Matching? Antenna s impedance is the NFC IC s load resistance 2 parameters depend on the NFC IC s load resistance the transmitter supply current and the emitted RF power Both parameters decrease with increasing load resistance transmitter supply current [ma] load resistance [Ohm] emitted RF power [mw] load resistance [Ohm] Good trade-off between both parameters around 40 to 50 ohms Roland, Witschnig, Merlin, Saminger Automatic Impedance Matching CSNDSP08 7 / 24
![RF power Both parameters decrease with increasing load resistance transmitter supply current [ma] 140 120 100 80 60 40 20 0 0 10 20 30 40 50 60 70 load](/docs-images/46/21653620/images/page_7.jpg "resistance [Ohm] emitted RF power [mw] 140 120 100 80 60 40 20 0 0 10 20 30 40 50 60 70 load resistance [Ohm] Good trade-off between both parameters")
8 Motivation Impedance Matching NFC Antenna Topology TX1 to RX L0 C0 C1 C2 RQ NFC IC TX2 GND L0 C0 C1 C2 RQ NFC antenna topology with EMC filter, matching circuit, quality factor damping resistors and antenna coil C 1 and C 2 are adjusted until the whole topology circuit matches 50 ohms at its clamps (TX1, TX2) Roland, Witschnig, Merlin, Saminger Automatic Impedance Matching CSNDSP08 8 / 24
9 Motivation Impedance Matching Disadvantages of Manual Impedance Matching Expensive equipment (network analyzer, impedance analyzer) Time-consuming procedure Good sense of choosing the right capacitor values necessary Roland, Witschnig, Merlin, Saminger Automatic Impedance Matching CSNDSP08 9 / 24
10 Outline Automatic Impedance Matching Automatic Tuning System 1 Overview of the NFC Research Lab 2 Motivation NFC Equipment and its Antennas Impedance Matching 3 Automatic Impedance Matching Automatic Tuning System Matching Circuit Controller Results 4 Summary and Outlook Roland, Witschnig, Merlin, Saminger Automatic Impedance Matching CSNDSP08 10 / 24
11 Automatic Impedance Matching Automatic Tuning System Requirements Most NFC devices are mobile handsets Automatic tuning system must be small in shape and size Single chip solution preferred ideal solution has only integrable parts Roland, Witschnig, Merlin, Saminger Automatic Impedance Matching CSNDSP08 11 / 24
12 System Design Automatic Impedance Matching Automatic Tuning System Automatic tuning system design split into its three components: measuring circuit, matching circuit and controller component. waveform generator voltage follower amplitude phase voltage follower measuring bridge antenna Roland, Witschnig, Merlin, Saminger Automatic Impedance Matching CSNDSP08 12 / 24
13 Outline Automatic Impedance Matching 1 Overview of the NFC Research Lab 2 Motivation NFC Equipment and its Antennas Impedance Matching 3 Automatic Impedance Matching Automatic Tuning System Matching Circuit Controller Results 4 Summary and Outlook Roland, Witschnig, Merlin, Saminger Automatic Impedance Matching CSNDSP08 13 / 24
14 Measuring Bridge Automatic Impedance Matching Wheatstone bridge with MHz sinusoidal supply Bridge is balanced (V diff = I 2 R 2 I Z Z = 0 V) R1 50 R3 50 amplitude & phase measurement R2 50 tuning circuit Tuning circuit is matched to 50 ohms (at the operating frequency) Roland, Witschnig, Merlin, Saminger Automatic Impedance Matching CSNDSP08 14 / 24
15 Automatic Impedance Matching Balancing the Amplitude of V diff Measuring rectifiers are used to rectify V SINE1 = I 2 R 2 and V SINE2 = I Z Z Resulting signals are low pass filtered V diff is calculated in software after analog-digital conversion R3 D1 VSINE GND R1 R V+ V- 1 U1A D2 R4 VRECT C1 GND Roland, Witschnig, Merlin, Saminger Automatic Impedance Matching CSNDSP08 15 / 24
16 Automatic Impedance Matching Balancing the Phase of V diff V SINE1 and V SINE2 shaped into rectangular signals Phase detector: phase-offset is converted into a pulse-width modulated signal PWM signal is low pass filtered and fed into an analog-digital converter R1 VSINE1 VSINE2 R3 GND GND U1A 4 U1D 13 R2 R4 /Q SET RESET Q PHASE Roland, Witschnig, Merlin, Saminger Automatic Impedance Matching CSNDSP08 16 / 24
17 Automatic Impedance Matching Verification of the Verified with a manually tunable antenna circuit The antenna is connected to the measuring circuit and tuned Tuning is verified with a network analyzer Result is approximately the same with several tested antennas: Roland, Witschnig, Merlin, Saminger Automatic Impedance Matching CSNDSP08 17 / 24
18 Outline Automatic Impedance Matching Matching Circuit 1 Overview of the NFC Research Lab 2 Motivation NFC Equipment and its Antennas Impedance Matching 3 Automatic Impedance Matching Automatic Tuning System Matching Circuit Controller Results 4 Summary and Outlook Roland, Witschnig, Merlin, Saminger Automatic Impedance Matching CSNDSP08 18 / 24
19 Automatic Impedance Matching Matching Circuit Matching Circuit C 1 and C 2 in the antenna topology are replaced with capacitance arrays Capacitance array: network of parallel switched capacitors Capacitors switched with low-capacitance DMOS switches S0 S1 S2 S3 Sn 1 * C 2 * C 4 * C 8 * C (2^n) * C Roland, Witschnig, Merlin, Saminger Automatic Impedance Matching CSNDSP08 19 / 24
20 Outline Automatic Impedance Matching Controller 1 Overview of the NFC Research Lab 2 Motivation NFC Equipment and its Antennas Impedance Matching 3 Automatic Impedance Matching Automatic Tuning System Matching Circuit Controller Results 4 Summary and Outlook Roland, Witschnig, Merlin, Saminger Automatic Impedance Matching CSNDSP08 20 / 24
21 Automatic Impedance Matching Controller Controller Analyses the measurands by reading the values from analog-digital converter Controls the capacitance arrays Tuning algorithm to minimizes amplitude and phase of V diff by optimal adjustment of C 1 and C 2 Roland, Witschnig, Merlin, Saminger Automatic Impedance Matching CSNDSP08 21 / 24
22 Outline Automatic Impedance Matching Results 1 Overview of the NFC Research Lab 2 Motivation NFC Equipment and its Antennas Impedance Matching 3 Automatic Impedance Matching Automatic Tuning System Matching Circuit Controller Results 4 Summary and Outlook Roland, Witschnig, Merlin, Saminger Automatic Impedance Matching CSNDSP08 22 / 24
23 Automatic Impedance Matching Automatic Tuning Results Results Antenna 1 Antenna 2 Antenna 3 Antenna 4 Roland, Witschnig, Merlin, Saminger Automatic Impedance Matching CSNDSP08 23 / 24
24 Summary and Outlook Summary and Outlook Automatic impedance matching significantly simplifies the integration of NFC ICs into applications. This automatic tuning system successfully finds the optimum values for the antenna circuit s tuning capacitors. Only integrable components are used. Outlook Parasitic effects of the DMOS switches need to be investigated. The tuning algorithm may be optimized. The whole system should be integrated into a single IC. Roland, Witschnig, Merlin, Saminger Automatic Impedance Matching CSNDSP08 24 / 24
Changes PN532_Breakout board
Changes PN532_Breakout board Document: Changes PN532_Breakout board Department / Faculty : TechnoCentrum - Radboud University Nijmegen Contact: René Habraken Date: 17 May 2011 Doc. Version: 1.0 Contents
Impedance Matching and Matching Networks. Valentin Todorow, December, 2009
Impedance Matching and Matching Networks Valentin Todorow, December, 2009 RF for Plasma Processing - Definition of RF What is RF? The IEEE Standard Dictionary of Electrical and Electronics Terms defines
LOW COST MOTOR PROTECTION FILTERS FOR PWM DRIVE APPLICATIONS STOPS MOTOR DAMAGE
LOW COST MOTOR PROTECTION FILTERS FOR PWM DRIVE APPLICATIONS STOPS MOTOR DAMAGE Karl M. Hink, Executive Vice President Originally presented at the Power Quality 99 Conference ABSTRACT Motor protection
Diode Applications. by Kenneth A. Kuhn Sept. 1, 2008. This note illustrates some common applications of diodes.
by Kenneth A. Kuhn Sept. 1, 2008 This note illustrates some common applications of diodes. Power supply applications A common application for diodes is converting AC to DC. Although half-wave rectification
Tire pressure monitoring
Application Note AN601 Tire pressure monitoring 1 Purpose This document is intended to give hints on how to use the Intersema pressure sensors in a low cost tire pressure monitoring system (TPMS). 2 Introduction
Experiment # (4) AM Demodulator
Islamic University of Gaza Faculty of Engineering Electrical Department Experiment # (4) AM Demodulator Communications Engineering I (Lab.) Prepared by: Eng. Omar A. Qarmout Eng. Mohammed K. Abu Foul Experiment
AN1445. Antenna design guide for MFRC52x, PN51x and PN53x. Application note PUBLIC. Rev. 1.2 11 October 2010 144512. Document information
Document information Info Content Keywords NFC, MFRC5, MFRC53, PN511, PN51, PN531, PN53, Antenna Design, RF Design, constant current design Abstract This application notes provides guidance on antenna
LAB 7 MOSFET CHARACTERISTICS AND APPLICATIONS
LAB 7 MOSFET CHARACTERISTICS AND APPLICATIONS Objective In this experiment you will study the i-v characteristics of an MOS transistor. You will use the MOSFET as a variable resistor and as a switch. BACKGROUND
7-41 POWER FACTOR CORRECTION
POWER FTOR CORRECTION INTRODUCTION Modern electronic equipment can create noise that will cause problems with other equipment on the same supply system. To reduce system disturbances it is therefore essential
AVX EMI SOLUTIONS Ron Demcko, Fellow of AVX Corporation Chris Mello, Principal Engineer, AVX Corporation Brian Ward, Business Manager, AVX Corporation
AVX EMI SOLUTIONS Ron Demcko, Fellow of AVX Corporation Chris Mello, Principal Engineer, AVX Corporation Brian Ward, Business Manager, AVX Corporation Abstract EMC compatibility is becoming a key design
Constructing a precision SWR meter and antenna analyzer. Mike Brink HNF, Design Technologist.
Constructing a precision SWR meter and antenna analyzer. Mike Brink HNF, Design Technologist. Abstract. I have been asked to put together a detailed article on a SWR meter. In this article I will deal
a leap ahead in analog
EMV Contactless Payment Systems based on AS3911 Overview and System Simulations Giuliano Manzi, PhD Mannheim, May 23 25, 2012 CST EUROPEAN USER CONFERENCE 2012 a leap ahead in analog OUTLINE AS3911 OVERVIEW
Study Guide for the Electronics Technician Pre-Employment Examination
Bay Area Rapid Transit District Study Guide for the Electronics Technician Pre-Employment Examination INTRODUCTION The Bay Area Rapid Transit (BART) District makes extensive use of electronics technology
LM 358 Op Amp. If you have small signals and need a more useful reading we could amplify it using the op amp, this is commonly used in sensors.
LM 358 Op Amp S k i l l L e v e l : I n t e r m e d i a t e OVERVIEW The LM 358 is a duel single supply operational amplifier. As it is a single supply it eliminates the need for a duel power supply, thus
Contents. Preface. xiii. Part I 1
Contents Preface xiii Part I 1 Chapter 1 Introduction to Frequency-Modulated Continuous-Wave 3 Radar 1.1 Brief History 3 1.2 Examples of Use of FMCW Radar 5 1.2.1 Radio Altimeters 5 1.2.2 Level-Measuring
CHAPTER 2B: DIODE AND APPLICATIONS. D.Wilcher
CHAPTER 2B: DIODE AND APPLICATIONS D.Wilcher 1 CHAPTER 2B: OBJECTIVES Analyze the operation of 3 basic types of rectifiers Describe the operation of rectifier filters and IC regulators Analyze the operation
AN2866 Application note
Application note How to design a 13.56 MHz customized tag antenna Introduction RFID (radio-frequency identification) tags extract all of their power from the reader s field. The tags and reader s antennas
Efficient and reliable operation of LED lighting is dependent on the right choice of current-limiting resistor
Efficient and reliable operation of LED lighting is dependent on the right choice of current-limiting resistor Phil Ebbert, VP of Engineering, Riedon Inc. Introduction Not all resistors are the same and
Application Note SAW-Components
Application Note SAW-Components Principles of SAWR-stabilized oscillators and transmitters. App: Note #1 This application note describes the physical principle of SAW-stabilized oscillator. Oscillator
Output Ripple and Noise Measurement Methods for Ericsson Power Modules
Output Ripple and Noise Measurement Methods for Ericsson Power Modules Design Note 022 Ericsson Power Modules Ripple and Noise Abstract There is no industry-wide standard for measuring output ripple and
Fundamentals of Power Electronics. Robert W. Erickson University of Colorado, Boulder
Robert W. Erickson University of Colorado, Boulder 1 1.1. Introduction to power processing 1.2. Some applications of power electronics 1.3. Elements of power electronics Summary of the course 2 1.1 Introduction
GaAs Switch ICs for Cellular Phone Antenna Impedance Matching
GaAs Switch ICs for Cellular Phone Antenna Impedance Matching IWATA Naotaka, FUJITA Masanori Abstract Recently cellular phones have been advancing toward multi-band and multi-mode phones and many of them
The full wave rectifier consists of two diodes and a resister as shown in Figure
The Full-Wave Rectifier The full wave rectifier consists of two diodes and a resister as shown in Figure The transformer has a centre-tapped secondary winding. This secondary winding has a lead attached
EE302 Lesson 14: Antennas
EE302 Lesson 14: Antennas Loaded antennas /4 antennas are desirable because their impedance is purely resistive. At low frequencies, full /4 antennas are sometime impractical (especially in mobile applications).
VJ 6040 Mobile Digital TV UHF Antenna Evaluation Board
VISHAY VITRAMON Multilayer Chip Capacitors Application Note GENERAL is a multilayer ceramic chip antenna designed for receiving mobile digital TV transmissions in the UHF band. The target application for
Experiment 2 Diode Applications: Rectifiers
ECE 3550 - Practicum Fall 2007 Experiment 2 Diode Applications: Rectifiers Objectives 1. To investigate the characteristics of half-wave and full-wave rectifier circuits. 2. To recognize the usefulness
The W5JCK Guide to the Mathematic Equations Required for the Amateur Extra Class Exam
The W5JCK Guide to the Mathematic Equations Required for the Amateur Extra Class Exam This document contains every question from the Extra Class (Element 4) Question Pool* that requires one or more mathematical
1. Learn about the 555 timer integrated circuit and applications 2. Apply the 555 timer to build an infrared (IR) transmitter and receiver
Electronics Exercise 2: The 555 Timer and its Applications Mechatronics Instructional Laboratory Woodruff School of Mechanical Engineering Georgia Institute of Technology Lab Director: I. Charles Ume,
Adding Heart to Your Technology
RMCM-01 Heart Rate Receiver Component Product code #: 39025074 KEY FEATURES High Filtering Unit Designed to work well on constant noise fields SMD component: To be installed as a standard component to
Product Datasheet P1110 915 MHz RF Powerharvester Receiver
DESCRIPTION The Powercast P1110 Powerharvester receiver is an RF energy harvesting device that converts RF to DC. Housed in a compact SMD package, the P1110 receiver provides RF energy harvesting and power
Lecture - 4 Diode Rectifier Circuits
Basic Electronics (Module 1 Semiconductor Diodes) Dr. Chitralekha Mahanta Department of Electronics and Communication Engineering Indian Institute of Technology, Guwahati Lecture - 4 Diode Rectifier Circuits
Properties of electrical signals
DC Voltage Component (Average voltage) Properties of electrical signals v(t) = V DC + v ac (t) V DC is the voltage value displayed on a DC voltmeter Triangular waveform DC component Half-wave rectifier
Chapter 10. RC Circuits ISU EE. C.Y. Lee
Chapter 10 RC Circuits Objectives Describe the relationship between current and voltage in an RC circuit Determine impedance and phase angle in a series RC circuit Analyze a series RC circuit Determine
Germanium Diode AM Radio
Germanium Diode AM Radio LAB 3 3.1 Introduction In this laboratory exercise you will build a germanium diode based AM (Medium Wave) radio. Earliest radios used simple diode detector circuits. The diodes
Nano Stepping Notch Filter Jim Hagerman 02 01 12
Nano Stepping Notch Filter Jim Hagerman 02 01 12 INTRODUCTION I worked out equations for the von Newman style high power notch filter. This design is tunable over a fairly wide range, but less than an
Abracon PTM Introduction to ANFCA Series Flexible Peel & Stick NFC Antennas
Abracon PTM Introduction to ANFCA Series Flexible Peel & Stick NFC Antennas WWW.ABRACON.COM ANFCA Series Flexible Peel & Stick NFC Antennas Purpose To introduce ANFCA Series, Flexible Peel & Stick NFC
Designers Series XII. Switching Power Magazine. Copyright 2005
Designers Series XII n this issue, and previous issues of SPM, we cover the latest technologies in exotic high-density power. Most power supplies in the commercial world, however, are built with the bread-and-butter
UNDERSTANDING AND CONTROLLING COMMON-MODE EMISSIONS IN HIGH-POWER ELECTRONICS
Page 1 UNDERSTANDING AND CONTROLLING COMMON-MODE EMISSIONS IN HIGH-POWER ELECTRONICS By Henry Ott Consultants Livingston, NJ 07039 (973) 992-1793 www.hottconsultants.com [email protected] Page 2 THE BASIC
Diode Applications. As we have already seen the diode can act as a switch Forward biased or reverse biased - On or Off.
Diode Applications Diode Switching As we have already seen the diode can act as a switch Forward biased or reverse biased - On or Off. Voltage Rectifier A voltage rectifier is a circuit that converts an
USB2.0 Technical Manual
TDK EMC Technology Practice Section USB2.0 Technical Manual TDK Corporation Magnetics Business Group Mitsuharu Mizutani 1 Introduction USB2.0 was released in April of 2000 and it has become the standard
Application Guide. Power Factor Correction (PFC) Basics
Power Factor Correction (PFC) Basics Introduction Power Factor, in simple terms, is a number between zero and one that represents the ratio of the real power to apparent power. Real power (P), measured
Novel Loaded-Resonant Converter & Application of DC-to-DC Energy Conversions systems
International Refereed Journal of Engineering and Science (IRJES) ISSN (Online) 2319-183X, (Print) 2319-1821 Volume 2, Issue 11 (November 2013), PP.50-57 Novel Loaded-Resonant Converter & Application of
How to design SMPS to Pass Common Mode Lightning Surge Test
Application Note, V1.0, September 2006 How to design SMPS to Pass Common Mode Lightning Surge Test Power Management & Supply N e v e r s t o p t h i n k i n g. Edition 2006-09-06 Published by Infineon
Chapter 6. CMOS Class-E Power Amplifier
Chapter 6 CMOS Class-E Power Amplifier 6.0 Introduction Last few years have seen an increase in the popularity of the wireless communication systems. As a result, the demand for compact, low-cost, and
Evaluating AC Current Sensor Options for Power Delivery Systems
Evaluating AC Current Sensor Options for Power Delivery Systems State-of-the-art isolated ac current sensors based on CMOS technology can increase efficiency, performance and reliability compared to legacy
Bridgeless PFC Implementation Using One Cycle Control Technique
Bridgeless PFC Implementation Using One Cycle Control Technique Bing Lu Center for Power Electronics Systems Virginia Polytechnic Institute and State University 674 Whittemore Hall Blacksburg, VA 24061
1ED Compact A new high performance, cost efficient, high voltage gate driver IC family
1ED Compact A new high performance, cost efficient, high voltage gate driver IC family Heiko Rettinger, Infineon Technologies AG, Am Campeon 1-12, 85579 Neubiberg, Germany, [email protected]
Noise Free 90+ for LCD TV AC Adapter Desk Top. 96% x 96% = 92.16% Champion Microelectronic. 96+ Interleaved CRM PFC CM6565 PFC & PFC PWM PWM
Soft Soft Switching Switching PFC PFC & & Soft Soft Switching Switching PWM PWM 96% x 96% = 92.16% Noise Free 90+ for LCD TV AC Adapter Desk Top 1 96% x 96% = 92.16% 96+ LLC/SRC + SR CM6900/1 92% x 96%
CAN Bus Transceivers Operate from 3.3V or 5V and Withstand ±60V Faults
CAN Bus Transceivers Operate from 3.3V or 5V and Withstand ±6 Faults Ciaran Brennan design features The LTC2875 is a robust CAN bus transceiver that features ±6 overvoltage and ±25kV ESD tolerance to reduce
Wireless Security Camera
Wireless Security Camera Technical Manual 12/14/2001 Table of Contents Page 1.Overview 3 2. Camera Side 4 1.Camera 5 2. Motion Sensor 5 3. PIC 5 4. Transmitter 5 5. Power 6 3. Computer Side 7 1.Receiver
HIGH FREQUENCY TRANSFORMER WITH TRANSFORMER SWITCHOVER
OPTIMUM EFFICIENCY AND FLEXIBLE USE HIGH FREQUENCY TRANSFORMER WITH TRANSFORMER SWITCHOVER One of the many requirements of the modern inverter is a broad, coordinated input and MPP voltage range with a
Low Cost Pure Sine Wave Solar Inverter Circuit
Low Cost Pure Sine Wave Solar Inverter Circuit Final Report Members: Cameron DeAngelis and Luv Rasania Professor: Yicheng Lu Advisor: Rui Li Background Information: Recent rises in electrical energy costs
REPORT ON CANDIDATES WORK IN THE CARIBBEAN ADVANCED PROFICIENCY EXAMINATION MAY/JUNE 2008 ELECTRICAL AND ELECTRONIC TECHNOLOGY (TRINIDAD AND TOBAGO)
CARIBBEAN EXAMINATIONS COUNCIL REPORT ON CANDIDATES WORK IN THE CARIBBEAN ADVANCED PROFICIENCY EXAMINATION MAY/JUNE 2008 ELECTRICAL AND ELECTRONIC TECHNOLOGY (TRINIDAD AND TOBAGO) Copyright 2008 Caribbean
Modeling and Analysis of DC Link Bus Capacitor and Inductor Heating Effect on AC Drives (Part I)
00-00-//$0.00 (c) IEEE IEEE Industry Application Society Annual Meeting New Orleans, Louisiana, October -, Modeling and Analysis of DC Link Bus Capacitor and Inductor Heating Effect on AC Drives (Part
Improvements of Reliability of Micro Hydro Power Plants in Sri Lanka
Improvements of Reliability of Micro Hydro Power Plants in Sri Lanka S S B Udugampala, V Vijayarajah, N T L W Vithanawasam, W M S C Weerasinghe, Supervised by: Eng J Karunanayake, Dr. K T M U Hemapala
Department of Electrical and Computer Engineering Ben-Gurion University of the Negev. LAB 1 - Introduction to USRP
Department of Electrical and Computer Engineering Ben-Gurion University of the Negev LAB 1 - Introduction to USRP - 1-1 Introduction In this lab you will use software reconfigurable RF hardware from National
ULRASONIC GENERATOR POWER CIRCUITRY. Will it fit on PC board
ULRASONIC GENERATOR POWER CIRCUITRY Will it fit on PC board MAJOR COMPONENTS HIGH POWER FACTOR RECTIFIER RECTIFIES POWER LINE RAIL SUPPLY SETS VOLTAGE AMPLITUDE INVERTER INVERTS RAIL VOLTAGE FILTER FILTERS
DIODE CIRCUITS LABORATORY. Fig. 8.1a Fig 8.1b
DIODE CIRCUITS LABORATORY A solid state diode consists of a junction of either dissimilar semiconductors (pn junction diode) or a metal and a semiconductor (Schottky barrier diode). Regardless of the type,
Common Mode Choke Filtering Improves CMRR in Ethernet Transformer Applications. Application Note. June 2011
Common Mode Choke Filtering Improves CMRR in Ethernet Transformer Applications June 2011 Application Note Common mode chokes provide an effective EMI filtering solution for Ethernet transformer applications.
A CW QRP Transceiver for 20 m band. How it works I'll describe individually the three boards and the relative tuning devices.
A CW QRP Transceiver for 20 m band The little QRP presented in this article may be built in a gradual manner, in fact it is divided in two main modules (plus VFO), you may also complete only a single part
Electronic Circuits Workshop Snap Circuits
Electronic Circuits Workshop Snap Circuits LEARNING GOALS: After the completion of this workshop, students will understand: 1. The basic components of an electronic circuit 2. How these components work
MEASUREMENT UNCERTAINTY IN VECTOR NETWORK ANALYZER
MEASUREMENT UNCERTAINTY IN VECTOR NETWORK ANALYZER W. Li, J. Vandewege Department of Information Technology (INTEC) University of Gent, St.Pietersnieuwstaat 41, B-9000, Gent, Belgium Abstract: Precision
Case Studies in On-Line Measurement of PD in Motors Fed by Voltage Source PWM Drives
Case Studies in On-Line Measurement of PD in Motors Fed by Voltage Source PWM Drives G.C. Stone, I. Culbert, H.G. Sedding Qualitrol-Iris Power Mississauga, Ontario, Canada Abstract On-line partial discharge
ECEN 1400, Introduction to Analog and Digital Electronics
ECEN 1400, Introduction to Analog and Digital Electronics Lab 4: Power supply 1 INTRODUCTION This lab will span two lab periods. In this lab, you will create the power supply that transforms the AC wall
5B5BBasic RC Oscillator Circuit
5B5BBasic RC Oscillator Circuit The RC Oscillator which is also called a Phase Shift Oscillator, produces a sine wave output signal using regenerative feedback from the resistor-capacitor combination.
Power supply output voltages are dropping with each
DESIGNER S SERIES Second-Stage LC Filter Design First Inductor by Dr. Ray Ridley First Capacitor Power supply output voltages are dropping with each new generation of Integrated Circuits (ICs). Anticipated
Modification Details.
Front end receiver modification for DRM: AKD Target Communications receiver. Model HF3. Summary. The receiver was modified and capable of receiving DRM, but performance was limited by the phase noise from
Circuits with inductors and alternating currents. Chapter 20 #45, 46, 47, 49
Circuits with inductors and alternating currents Chapter 20 #45, 46, 47, 49 RL circuits Ch. 20 (last section) Symbol for inductor looks like a spring. An inductor is a circuit element that has a large
RF Measurements Using a Modular Digitizer
RF Measurements Using a Modular Digitizer Modern modular digitizers, like the Spectrum M4i series PCIe digitizers, offer greater bandwidth and higher resolution at any given bandwidth than ever before.
Yrd. Doç. Dr. Aytaç Gören
H2 - AC to DC Yrd. Doç. Dr. Aytaç Gören ELK 2018 - Contents W01 Basic Concepts in Electronics W02 AC to DC Conversion W03 Analysis of DC Circuits W04 Transistors and Applications (H-Bridge) W05 Op Amps
An Ethernet Cable Discharge Event (CDE) Test and Measurement System
An Ethernet Cable Discharge Event (CDE) Test and Measurement System Wei Huang, Jerry Tichenor ESDEMC Technology LLC Rolla, MO, USA [email protected] Abstract A Cable Discharge Event (CDE) is an electrostatic
Understanding SMD Power Inductors. Application Note. July 2011
Understanding SMD Power Inductors July 2011 Application Note Power inductors play an important role in voltage conversion applications by yielding lower core losses. They are also used to store energy,
Lab 3 Rectifier Circuits
ECET 242 Electronic Circuits Lab 3 Rectifier Circuits Page 1 of 5 Name: Objective: Students successfully completing this lab exercise will accomplish the following objectives: 1. Learn how to construct
RigExpert AA-30 Antenna Analyzer (0.1 to 30 MHz) AA-54 Antenna Analyzer (0.1 to 54 MHz) User s manual
RigExpert AA-30 Antenna Analyzer (0.1 to 30 MHz) AA-54 Antenna Analyzer (0.1 to 54 MHz) User s manual Table of contents 1. Description... 3 2. Specifications... 4 3. Precautions... 5 4. Operation... 6
Physics 120 Lab 6: Field Effect Transistors - Ohmic region
Physics 120 Lab 6: Field Effect Transistors - Ohmic region The FET can be used in two extreme ways. One is as a voltage controlled resistance, in the so called "Ohmic" region, for which V DS < V GS - V
MFRD52x. Mifare Contactless Smart Card Reader Reference Design. Document information
Rev. 2.1 17. April 2007 Preliminary Data Sheet Document information Info Keywords Content MFRC522, MFRC523, MFRC52x, MFRD522, MFRD523, Mifare Contactless Smart Card Reader Reference Design, Mifare Reader
Understanding Power Impedance Supply for Optimum Decoupling
Introduction Noise in power supplies is not only caused by the power supply itself, but also the load s interaction with the power supply (i.e. dynamic loads, switching, etc.). To lower load induced noise,
AN1991. Audio decibel level detector with meter driver
Rev. 2.1 20 March 2015 Application note Document information Info Keywords Abstract Content SA604A, LM358, RSSI, cellular radio The SA604A can provide a logarithmic response proportional to the input signal
AN-8019 Reliable USB Modem Design Using the Combination of an Integrated Load Switch and a Buck Converter
www.fairchildsemi.com AN-8019 Reliable USB Modem Design Using the Combination of an Integrated Load Switch and a Buck Converter Introduction In the portable electronics market, a wireless network allows
Line Reactors and AC Drives
Line Reactors and AC Drives Rockwell Automation Mequon Wisconsin Quite often, line and load reactors are installed on AC drives without a solid understanding of why or what the positive and negative consequences
Rectifier circuits & DC power supplies
Rectifier circuits & DC power supplies Goal: Generate the DC voltages needed for most electronics starting with the AC power that comes through the power line? 120 V RMS f = 60 Hz T = 1667 ms) = )sin How
RF Energy Harvesting Circuits
RF Energy Harvesting Circuits Joseph Record University of Maine ECE 547 Fall 2011 Abstract This project presents the design and simulation of various energy harvester circuits. The overall design consists
Digital to Analog Converter. Raghu Tumati
Digital to Analog Converter Raghu Tumati May 11, 2006 Contents 1) Introduction............................... 3 2) DAC types................................... 4 3) DAC Presented.............................
MEETING TRANSIENT SPECIFICATIONS FOR ELECTRICAL SYSTEMS IN MILITARY VEHICLES
MEETING TRANSIENT SPECIFICATIONS FOR ELECTRICAL SYSTEMS IN MILITARY VEHICLES By Arthur Jordan Sr. Applications Engineer, Vicor Electrical systems in military vehicles are normally required to meet stringent
RC NETWORKS SALES GUIDE
SALES GUIDE INTRODUCTION TO Recent developments in electronic equipment have shown the following trends: Increasing demands for numerical control machines, robotics and technically advanced appliances
WIND TURBINE TECHNOLOGY
Module 2.2-2 WIND TURBINE TECHNOLOGY Electrical System Gerhard J. Gerdes Workshop on Renewable Energies November 14-25, 2005 Nadi, Republic of the Fiji Islands Contents Module 2.2 Types of generator systems
Current and Temperature Ratings
Document 361-1 Current and Temperature Ratings Introduction This application note describes: How to interpret Coilcraft inductor current and temperature ratings Our current ratings measurement method and
Design Considerations for RF Energy Harvesting Devices
Design Considerations for RF Energy Harvesting Devices Harry Ostaffe Director, Marketing & Business Development 1 Overview RF energy is generally very low Direct-power at close range to a transmitter Energy
Modulation and Demodulation
16 Modulation and Demodulation 16.1 Radio Broadcasting, Transmission and Reception 16. Modulation 16.3 Types of Modulation 16.4 Amplitude Modulation 16.5 Modulation Factor 16.6 Analysis of Amplitude Modulated
Power supplies. EE328 Power Electronics Assoc. Prof. Dr. Mutlu BOZTEPE Ege University, Dept. of E&E
Power supplies EE328 Power Electronics Assoc. Prof. Dr. Mutlu BOZTEPE Ege University, Dept. of E&E EE328 POWER ELECTRONICS Outline of lecture Introduction to power supplies Modelling a power transformer
POWER SYSTEM HARMONICS. A Reference Guide to Causes, Effects and Corrective Measures AN ALLEN-BRADLEY SERIES OF ISSUES AND ANSWERS
A Reference Guide to Causes, Effects and Corrective Measures AN ALLEN-BRADLEY SERIES OF ISSUES AND ANSWERS By: Robert G. Ellis, P. Eng., Rockwell Automation Medium Voltage Business CONTENTS INTRODUCTION...
AND8480/D. CrM Buck LED Driver Evaluation Board APPLICATION NOTE
CrM Buck LED Driver Evaluation Board Prepared by: Fabien Franc ON Semiconductor Introduction This document describes the CrM Buck LED driver evaluation board. This board provides a step down converter
Signal Types and Terminations
Helping Customers Innovate, Improve & Grow Application Note Signal Types and Terminations Introduction., H, LV, Sinewave, Clipped Sinewave, TTL, PECL,,, CML Oscillators and frequency control devices come
Read/Write Devices based on the HITAG Read/Write IC HTRC110
APPLICATION NOTE Read/Write Devices based on the HITAG Revision 1.1 December 1997 Abstract Designing read/write device (RWD) units for industrial RF-Identification applications is strongly facilitated
AppNote 404 EM MICROELECTRONIC - MARIN SA. EM4095 Application Note RFID. Title: Product Family: TABLE OF CONTENT. Application Note 404
EM MICROELECTRONIC - MARIN SA AppNote 0 Title: Product Family: Application Note 0 EM095 Application Note RFID Part Number: EM095 Keywords: RFID Transceiver, Reader Chip, EM095 Date: 5 September 00 TABLE
Using the Teridian 73M2901CE in 4-Wire and Leased Line Applications
A Maxim Integrated Products Brand 7M90CE V. bis Single Chip Modem APPLICATION NOTE AN_90CE_0 February 009 Introduction Using the Teridian 7M90CE in -Wire and Leased Line Applications The Teridian 7M90
Programmable Single-/Dual-/Triple- Tone Gong SAE 800
Programmable Single-/Dual-/Triple- Tone Gong Preliminary Data SAE 800 Bipolar IC Features Supply voltage range 2.8 V to 18 V Few external components (no electrolytic capacitor) 1 tone, 2 tones, 3 tones
Inrush Current. Although the concepts stated are universal, this application note was written specifically for Interpoint products.
INTERPOINT Although the concepts stated are universal, this application note was written specifically for Interpoint products. In today s applications, high surge currents coming from the dc bus are a