Differential and Multistage Intensifiers.


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Walk 08 2007. 1. Diff. BJT Amp. With Diff. Data. vB2=0, vB2=1Operate the first transistor in the dynamic area transmitting I, Q2 off. VB1. . VB2=0. . . Walk 08 2007. 2. Regular Mode Input Voltage. Walk 08 2007. 3. Differential pair with little info. . . . For direct enhancer, apply little information, .
Transcripts
Slide 1

Differential and Multistage Amplifiers BJT & FET Differential Pair Small Signal Model Biasing March 08 2007

Slide 2

Diff. BJT Amp. With Diff. Input v B2 =0, v B2 =1 Operate the principal transistor in the dynamic district conveying I, Q 2 off V B1 V B2 =0 March 08 2007

Slide 3

Common Mode Input Voltage March 08 2007

Slide 4

Differential pair with little contribution For direct enhancer, apply little information, March 08 2007

Slide 5

Large Signal Operation of BJT Diff. Intensifier Nonlinear reaction to change in voltage differential March 08 2007

Slide 6

Transfer Characteristic of BJT Diff. Pair Linear just for little info ! Contrast is constrained to not as much as V T/2 March 08 2007

Slide 7

Small Signal Model March 08 2007

Slide 8

Simplified Model March 08 2007

Slide 9

Diff Amp. w. Emitter Resistance March 08 2007

Slide 10

Differential FET Amplifier Differential intensifier comprises of two coordinated transistors which lead the same current March 08 2007

Slide 11

Common Mode Input Voltage March 08 2007

Slide 12

Exercises 7.1, 7.2 March 08 2007

Slide 13

Exercise 7.3 V_DD and V_SS=1.5 V, k\'_n(W/L)=4mA/V^2, V_t=0.5V, I=0.4mA, R_D=2.5k Ohm March 08 2007

Slide 14

Diff. Amp. With Diff. Input v G2 =0, v G1 =v id V G1 March 08 2007

Slide 15

Large Signal Operation of MOSFET Diff. Intensifier Nonlinear reaction to change in voltage differential March 08 2007

Slide 16

Transfer Characteristic of FETDiff. Pair Linear just for little info ! Contrast is restricted to V_ov March 08 2007

Slide 17

Extending Linear Operation Range March 08 2007

Slide 18

Small Signal Model MOS Diff March 08 2007

Slide 19

Small Signal Analysis Input and yield Impedances March 08 2007

Slide 20

March 08 2007

Slide 21

Simplified Model Cut the differential pair into 2 March 08 2007

Slide 22

Mismatch of g_m March 08 2007

Slide 23

Offset Voltage to repay March 08 2007

Slide 24

Active burden keeps up inclination current I Active burden has high impedance Active Loads March 08 2007

Slide 25

Active Load in Saturation Without any information Active Load March 08 2007

Slide 26

The current produced by differential info will just stream to the heap Active Load March 08 2007

Slide 27

by and by, spillage from Drain to Source Active Load March 08 2007

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