Question

This is the solution to a homework problem. The table below was completely unfilled. I don't understand some of the filled in cells. If possible please show the circuit diagram to solve this and the relationships between the given parameters. In order to fill in the table, you would need a small signal model and a DC model. From the two models you get the equations you need to fill in the cells in the table. This solution was provided without any explanation.

Assignment 6 (SOLUTIONS) り Shown below is a common emitter amplifier biased with a current mirror. as Zin, Zout and the gain means a decrease in value. The symbol "0" means no change in value. Thus, if a slight increase in Rx yields All capacitors are "AC shorts" b) Fill in the table below with a +,-,or 0. The symbol means an increase in value and the symbol- a decrease in le, then place a "-“ in the Rx. Ic box. Assume that only one resistor is changed at a time. lc3 Zout Gain Zin Ra increases Ri increases R1 increases R increases Re Zo ZIN RL ค.

Answer 1

fins small signat ac checui't :- Zo C. Rs 3 ICA RitR Zin (v) Vi NT Reef Lare matted or m3Im3cc -el(only dependent on RREF) ff feEf ↑-Ama deceases. (No change for other ttnn RREF) then Ic3 " IC3. (No change fol RL ↑ and RC

(No.change fDY REF ↑ , Rı↑ and R2 ↑). (Note: ↑-inoeases and ↓-deceaes) Table Grain out 0 Ra10 Rc 1 0 0