1. (6 pts) The 741 op amp schemati is shown below. What is the function of the f

Question

1. (6 pts) The 741 op amp schemati is shown below. What is the function of the following transistors? a) Qn and Q2 (i) Qu is a CE gain stage and Qia is a CC buffer (i) Qu and Qua are CE gain stages (iii) Q12 is a CE gain stage and Q11 is a CC buffer (iv) Qu is a CE gain stage and Qa is a diode-connected transistor to adjust the DC level b) Q-Q4 G) differential CE input followed by CC buffer (i) differential CE-CB cascode input stage (iii) differential CC-CB cascade input stage (Giv) differential CB-CC cascade input stage c) Qs-Q G) buffered current source bias for differential input stage (ii) Wilson current mirror active load for differential input stage (iii) Widlar current mirror active load for differential input stage )buffered current mirror active load for differential input stage Qis 670HAT e, 017 13 ei R220 014 40 kQ 016 Vcc 50 kQ REXT

Explanation / Answer

1a)...

(i) Q11 is the CE and Q12 is CC.

1b)..

(iii)Differential CC - CB Cascade input stage.

1c).

(ii)Wilson current mirror active load for differential input stage.

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