Download presentation
Presentation is loading. Please wait.
Published byLambert Owens Modified over 9 years ago
1
EMT 212 ANALOG ELECTRONICS Professor Robert T Kennedy
2
Prof. R T Kennedy
3
TRANSCONDUCTANCE AMPLIFIER Prof. R T Kennedy SERIES F B tr T F A tco ViVi VfVf VdVd VOVO ioio - ioio SYSTEM FEEDBACK vivi vdvd vfvf A tco tr
4
TRANSCONDUCTANCE AMPLIFIER Prof. R T Kennedy + R1R1 - vivi ioio ioio + - R1R1 vovo vivi vdvd vfvf vfvf ioio ioio ioio ioio
5
TRANSCONDUCTANCE AMPLIFIER + R1R1 - vivi ioio ioio Prof. R T Kennedy vivi + - R1R1 vdvd vfvf vfvf ioio ioio ioio ioio ioio
6
TRANSCONDUCTANCE AMPLIFIER IDEAL OP-AMP ANALYSIS CLOSED LOOP GAIN Prof. R T Kennedy ioio SYSTEM FEEDBACK vivi vdvd vfvf A tco tr -
7
TRANSCONDUCTANCE AMPLIFIER IDEAL OP-AMP ANALYSIS CLOSED LOOP GAIN Prof. R T Kennedy tr vfvf R1R1 ioio ioio
8
TRANSCONDUCTANCE AMPLIFIER IDEAL OP-AMP ANALYSIS CLOSED LOOP INPUT IMPEDANCE Prof. R T Kennedy + - R1R1 vivi vdvd vfvf R IN r in i in ioio ioio ioio
9
TRANSCONDUCTANCE AMPLIFIER IDEAL OP-AMP ANALYSIS CLOSED LOOP INPUT IMPEDANCE Prof. R T Kennedy + - R1R1 vivi vdvd vfvf R IN r in i in ioio ioio ioio
10
TRANSCONDUCTANCE AMPLIFIER IDEAL OP-AMP ANALYSIS OUTPUT IMPEDANCE Prof. R T Kennedy vfvf v (+) v (-) vovo r out A tc0 v d r out + - i out
11
TRANSCONDUCTANCE AMPLIFIER IDEAL OP-AMP ANALYSIS CLOSED LOOP OUTPUT IMPEDANCE + - R1R1 vivi vdvd vfvf R OUT r out ioio ioio ioio Prof. R T Kennedy
12
TRANSCONDUCTANCE AMPLIFIER IDEAL OP-AMP ANALYSIS CLOSED LOOP OUTPUT IMPEDANCE Prof. R T Kennedy + - R1R1 vivi vdvd vfvf R OUT r out ioio ioio ioio
13
AMPLIFIER ‘PRACTICAL’ OP-AMP Prof. R T Kennedy gnd + R1R1 RFRF - vovo vivi +V -V CDCD gnd CDCD RVRV RCRC
14
TRANSCONDUCTANCE AMPLIFIER ‘PRACTICAL’ OP-AMP OUTPUT DC OFFSET VOLTAGE due to BIAS CURRENTS Prof. R T Kennedy + R1R1 RmRm - V i =0 v (-) =0 V o =i b(-) R m v (+) =0 i b(+ ) i b(-) i=0 v (-) =0 i b(-)
15
TRANSCONDUCTANCE AMPLIFIER ‘PRACTICAL’ OP-AMP OUTPUT DC OFFSET VOLTAGE due to BIAS CURRENTS COMPENSATION Prof. R T Kennedy + R1R1 - VoVo v (+) =v (-) i b(+ ) i b(-) i R1 ifif RmRm RCRC i b(+) R C v R1
16
TRANSCONDUCTANCE AMPLIFIER APPLICATIONS HIGH INPUT IMPEDANCE VOLTAGE –CURRENT CONVERTER HIGH INPUT IMPEDANCE DC VOLTMETER HIGH INPUT IMPEDANCE AC VOLTMETER ZENER DIODE TESTER DIODE TESTER LED TESTER Prof. R T Kennedy
17
TRANSCONDUCTANCE AMPLIFIER HIGH INPUT IMPEDANCE DC VOLTMETER Prof. R T Kennedy + - ImIm R A + - V out RmRm V DC i b(-) V DC IRIR
18
TRANSCONDUCTANCE AMPLIFIER HIGH INPUT IMPEDANCE DC VOLTMETER Prof. R T Kennedy + - ImIm R A + - V out RmRm V DC i b(-) V DC IRIR AMMETER SCALING I FSD V DC 1 mA 1V 1 k 1 mA 5V 10 k I FSD V DC 50 A 1V 20 k 50 A 5V 100 k
19
TRANSCONDUCTANCE AMPLIFIER HIGH INPUT IMPEDANCE AC VOLTMETER Prof. R T Kennedy + - V ac ImIm ~ - V out RmRm R A + D1D1 D3D3 D4D4 D2D2
20
TRANSCONDUCTANCE AMPLIFIER HIGH INPUT IMPEDANCE AC VOLTMETER Prof. R T Kennedy AMMETER SCALING I FSD Vac(rms) 100 A 1V 9 k + - V ac ImIm ~ - V out RmRm R A + D1D1 D3D3 D4D4 D2D2 I FSD V DC 100 A 1V 10 k
21
TRANSCONDUCTANCE AMPLIFIER ZENER DIODE TESTER Prof. R T Kennedy + - R + - V out V DC i b(-) V DC IRIR VZVZ IZIZ
22
TRANSCONDUCTANCE AMPLIFIER ZENER DIODE TESTER Prof. R T Kennedy + - R + - V out V in i b(-) V DC IRIR VZVZ IZIZ RZRZ
23
TRANSCONDUCTANCE AMPLIFIER DIODE TESTER Prof. R T Kennedy + - R + - V out i b(-) V DC VDVD IDID IRIR IDID V (-)
24
TRANSCONDUCTANCE AMPLIFIER LED TESTER Prof. R T Kennedy + - R + - V out V in i b(-) V DC IRIR VDVD IDID
25
TRANSCONDUCTANCE AMPLIFIER TEST CURRENT > OP-AMP OUTPUT LIMIT + - R + - V out V in i b(-) V DC IRIR VDVD IDID -Vsuppply Prof. R T Kennedy
26
TRANSCONDUCTANCE AMPLIFIER GROUNDED LOAD current controlled by (+) input Prof. R T Kennedy + - RLRL V out VLVL i b(+) V DC ILIL R R R R VLVL VLVL IFIF I IN
27
TRANSCONDUCTANCE AMPLIFIER GROUNDED LOAD current controlled by (-) input Prof. R T Kennedy + - RLRL V out VLVL i b(+) V DC ILIL R R R R IFIF I IN V (-)
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.