JFET AMPLIFIER CONFIGURATIONS

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1 JFET MPFE CONFGUTON n G OUT n G OUT n OUT [a] Cn urce plfer [b] Cn ran [urce Fllwer] plfer [c] Cn Gate plfer Cte a: n ce, cure ateral fr 6.0 ntructry nal Electrnc abratry, prn 2007.MT OpenCureWare ( Maachuett nttute f Technly. wnlae n [ Mnth

cure ateral fr 6.0 ntructry nal Electrnc abratry, prn 2007.

2 JFET MPFE CONFGUTON WTH HYBΠ EQUENT CCUT COMMON OUCE MPFE WTH BYPE OUCE ETO 5 2N5459 G ut ut ut n r [ ] 2 9/27/06 Cte a: n ce, cure ateral fr 6.0 ntructry nal Electrnc abratry, prn MT OpenCureWare ( Maachuett nttute f Technly. wnlae n [ Mnth

3 JFET MPFE CONFGUTON WTH HYBΠ EQUENT CCUT COMMON N [OUCE FOOWE] MPFE 5 2N5459 G ut ut ut n ; [ ] 3 9/27/06 Cte a: n ce, cure ateral fr 6.0 ntructry nal Electrnc abratry, prn MT OpenCureWare ( Maachuett nttute f Technly. wnlae n [ Mnth

ateral fr 6.0 ntructry nal Electrnc abratry, prn 2007.

4 JFET MPFE CONFGUTON WTH HYBΠ EQUENT CCUT COMMON GTE MPFE 5 2N5459 ut ut 4 9/27/06 Cte a: n ce, cure ateral fr 6.0 ntructry nal Electrnc abratry, prn MT OpenCureWare ( Maachuett nttute f Technly. wnlae n [ Mnth

0 ntructry nal Electrnc abratry, prn 2007.

5 n ut then f, ; 0 5 9/27/06 Cte a: n ce, cure ateral fr 6.0 ntructry nal Electrnc abratry, prn MT OpenCureWare ( Maachuett nttute f Technly. wnlae n [ Mnth

6 EPTMENT OF EECTC ENGNEENG N COMPUTE CENCE MCHUETT NTTUTE OF TECHNOOGY CMBGE, MCHUETT 0239 w Frequency Hybrπ Equatn Chart TNTO Charactertc ltae Gan [f r >> ] Cn Etter CE wth E CC [E. Fllwer] Cn Bae E r π E β ( β ) // Current Gan β β β nput peance Output peance [ r ( ) ] π π β E // B [ r π ( β ) E ]// B r // B [f r >> ] [f r >> ] ( r // ) π β B // E β β rπ β [f r >> ] Phae eeral? Ye Ye N N JFET Charactertc Cn urce C urce wth Cn ran [urce Fllwer] ltae Gan [f r >> ] Current Gan nput peance Output peance Phae eeral? Cn Gate eneratr retance ery lare! ery lare! ery lare! G G G // [f r >> ] [f r >> ] // [f r >> ] Ye Ye N N 6 9/27/06 Cte a: n ce, cure ateral fr 6.0 ntructry nal Electrnc abratry, prn MT OpenCureWare ( Maachuett nttute f Technly. wnlae n [ Mnth

eeral? Ye Ye N N JFET Charactertc Cn urce C urce wth Cn ran [urce Fllwer] ltae Gan [f r >> ] Current Gan nput peance Output peance Phae eeral? Cn Gate eneratr retance ery lare!

7 FET COMMONOUCE MPFE BNGGPHC METHO #. FN G(OFF) & FO YOU ECE; MEUE UNG CUE TCE. [ G(OFF) GTEOUCE OTGE FO WHCH 0. WHEN G 0] 2. UME <<. 3. POT O NE ON THE OUTPUT CHCTETC. KEEP THE, 0 NTECEPT ON THE GPH PGE;. E. TY WY FOM NEY ETC O NE. 4. CCUTE FOM THE O NE NTECEPT. UE COET T. UE. 5. PCK QPONT UE OF G FO MXMUM NE OUTPUT WNG. 6. CCUTE : 7. CCUTE FO G T. 2 G ; O ETMTE FOM CHCTETC. G(ff ) G. UE COET TN UE. 8. COMPE N ; F COE TO, EPOT THE O NE. 9. ECCUTE FO NEW G. EPET TEP 7 N 8 NECEY! CCUTNG JFET MGN. CCUTE FOM Δ /Δ G ON N CHCTETC FOM CUE TCE [GE GN ] 2. O UE MEN PECFCTON HEET UE. [FO FT ETMTE.] O 2 G WHEE G r OPETNG PONT. G(ff ) G(ff ) 2 G(ff ) When G G(OFF), 0 G 0. NOTE THT THE MGN TNCONUCTNCE EPEN ON THE C B PONT, JUT T OE FO THE BPO TNTO! 7 9/27/06 Cte a: n ce, cure ateral fr 6.0 ntructry nal Electrnc abratry, prn MT OpenCureWare ( Maachuett nttute f Technly. wnlae n [ Mnth

2 G ; O ETMTE FOM CHCTETC. G(ff ) G. UE COET TN UE. 8. COMPE N ; F COE TO, EPOT THE O NE. 9. ECCUTE FO NEW G. EPET TEP 7 N 8 NECEY! CCUTNG JFET MGN.

8 FET COMMONOUCE MPFE BNGGPHC METHO #2. FN G(OFF) & FO YOU ECE; MEUE UNG CUE TCE. [ G(OFF) GTEOUCE OTGE FO WHCH 0. WHEN G 0] 2. EFE TO THE COMBNE TNFE [TNCONUCTNCE] CHCTETC N N CHCTETC CUE [TTCHE]. G(OFF) 3. CHOOE FOOW:. W THE NE EPEENTNG FOM THE OGN OF THE TNFE CUE GPH; THE Q PONT T THE NTEECTON OF THE TWO POT. TH ET Q T BOUT EXTEN HOZONT NE FOM THE Q UE ON THE TNFE CHCTETC EFTHN X THE WY CO THOUGH THE N CHCTETC. 5. THE GHTHN OTGE NTECEPT FO THE O NE [ON THE N CHCTETC] EQU TO THE UPPY OTGE. CHOOE UE FO Q THT GE OUGHY YMMETC OUTPUT OTGE WNG OUN Q. 6. W ETC NE FOM Q UPW TO NTEECT WTH THE NE WN N TEP #4. TH NTEECTON GE THE QPONT. 7. W THE O NE FOM THE UPPY OTGE THU THE QPONT UNT T NTEECT WTH THE CUENT X. 8. E THE UPPY OTGE BY THE CUENT X UE TO GET THE TOT UE OF ETNCE N THE NOUCE CCUT. 9. UBTCT THE UE OF FOUN N TEP #3 FOM THE UE FOUN N TEP #8 TO GET THE UE OF O [O N] ETO. UE COET TN UE FO BOTH ETO. 0. NOTE THT THE MOE ETC THE O NE, THE ME THE UE OF. OW EQU OW OTGE GN [ ]. CCEPTNG OWE OTGE Q WTH T TTENNT YMMETC OTGE WNG W OW HGHE UE. NCENG UPPY OTGE W O OW GE UE OF N MOE YMMETC OTGE WNG. [THE MOE HOZONT THE O NE, THE HGHE THE TOT NOUCE ETNCE.] 8 9/27/06 Cte a: n ce, cure ateral fr 6.0 ntructry nal Electrnc abratry, prn MT OpenCureWare ( Maachuett nttute f Technly. wnlae n [ Mnth

EXTEN HOZONT NE FOM THE Q UE ON THE TNFE CHCTETC EFTHN X THE WY CO THOUGH THE N CHCTETC. 5. THE GHTHN OTGE NTECEPT FO THE O NE [ON THE N CHCTETC] EQU TO THE UPPY OTGE.

9 FET OUCEFOOWE O NE/GN EXMPE & METHO. FN G(OFF) & FO YOU ECE; MEUE UNG CUE TCE. [ G(OFF) GTEOUCE OTGE FO WHCH 0. WHEN G 0] 2. CHOOE QPONT;.e. CHOOE G FOM N CHCTETC GPH. 3. CCUTE : 2 G ; O ETMTE FOM CHCTETC. G(ff ) 4. CCUTE ; UE COET TN UE. 5. CCUTE O NE NTECEPT, [MY HE TO UE Δ BECUE THE 0 NTECEPT MY BE WY OFF THE GPH PGE]. 6. CCUTE : 2 G(ff ) G G(ff ) 2 G(ff ) 7. CCUTE : 8. // 9. EXMPE [ P G(OFF) 5.8; 9] Exaple Exaple 2 Exaple 3. G, 4,.2 3, 2.3 2, kω.2 kω 470 Ω 3. Δ , , μmho,500 μmho 2,030 μmho 9 9/27/06 Cte a: n ce, cure ateral fr 6.0 ntructry nal Electrnc abratry, prn MT OpenCureWare ( Maachuett nttute f Technly. wnlae n [ Mnth

CCUTE : 2 G(ff ) G G(ff ) 2 G(ff ) 7. CCUTE : 8. // 9. EXMPE [ P G(OFF) 5.8; 9] Exaple Exaple 2 Exaple 3. G, 4,.2 3, 2.3 2, 4.2 2. 3.3 kω.2 kω 470 Ω 3. Δ @ Δ 4.55 2.5, 5.

10 Ω 428Ω 240Ω 0 9/27/06 Cte a: n ce, cure ateral fr 6.0 ntructry nal Electrnc abratry, prn MT OpenCureWare ( Maachuett nttute f Technly. wnlae n [ Mnth

N V V L. R a L I. Transformer Equation Notes

N V V L. R a L I. Transformer Equation Notes Tnsfome Eqution otes This file conts moe etile eivtion of the tnsfome equtions thn the notes o the expeiment 3 wite-up. t will help you to unestn wht ssumptions wee neee while eivg the iel tnsfome equtions