The transimpedance amplifier in Fig. P5.19 is driven by a balanced differential input, . Assuming all current sources are ideal and all transistors are in saturation, draw an equivalent small-signal...

The transimpedance amplifier in Fig. P5.19 is driven by a balanced differential input, . Assuming all current sources are ideal and all transistors are in saturation, draw an equivalent small-signal half circuit and use it to find expressions for each of the following in terms of the transistors’ small-signal parameters , , etc.

a. Feedback factor, .

b. Loop gain, .

c. Closed-loop response, .

d. Input resistance at dc, .

e. Output resistance at dc, .