2. Current feedback. Consider the circuit shown below. We assume ro = ? for all

Question

2. Current feedback.

Consider the circuit shown below. We assume ro = ? for all transistors.

1) In order to form a negative feedback, which terminal (X1 or X2) should Y be connected to? Why? After you make the decision, connect that terminal to Y to form a complete feedback network.

2) Which type of feedback is this circuit?

3) Calculate the feedforward gain, feedback factor, and closed-loop gain.

4) Calculate Rin,open, Rin,closed, Rout,open, and Rout,closed.

2. Current feedback. Consider the circuit shown below. We assume ro o for all transistors. 1) In order to form a negative feedback, which terminal (CXi or X2) should Y be connected to? Why? After you make the decision, connect that terminal to Y to form a complete feedback network. ) Which type of feedback is this circuit 3) Calculate the feedforward gain, feedback factor, and closed-loop gain. 4) Calculate Rimopm, in.clorud. Routopea, and Rout.closed V. R4 out M3 MR2

Explanation / Answer

1) In order to form negative feedback terminal X2 should be connected to Y because for feedback output terminal should be connected to input and here Vout is taken across X2 terminal and with this R3 becomes the series feedback resistor.

2) The feedback is series series feedback.

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