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The circuit in given figure is an example of a shunt-series feedback circuit. A signal proportional to the output current is fed back to the shunt connection at the base of Q1.

However, the circuit may be used as a voltage amplifier.

Assume transistor parameters of hF E = 120, VB E (on) = 0.7 V, and VA = ∞.

(a) Determine the small-signal parameters for Q1 and Q2.

(b) Using nodal analysis, determine the small-signal voltage gain Av = vo/vs.

2416_Figure.jpg

Electrical & Electronics, Engineering

  • Category:- Electrical & Electronics
  • Reference No.:- M91981351

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