P2.24 A two-transistor series voltage feedback amplifier is shown in Figure P2.24(a). This AC equivalent circuit neglects the bias resistors and the shunt capacitors. A block diagram representing the circuit is shown in FigureP2.24(b). This block diagram neglects the effect of hre, which is usually an accurate approximation, and assumes that R2+RL>>R1. (a) Determine the voltage gain Vo(s)/Vin(s). (b) Determine the current gain ic2/ib1. (c) Determine the input impedance Vin(s)/Ib1(s). Ta(8) 1 R+ hjel Biß2 R1 Vin(s) Vo(s) 8. R2 (1 +B,)R| Vin(8) Vej(s). Vej(8) R1 R + R2 (a) (b) Figure P2.24 Feedback amplifier.

P2.24 A two-transistor series voltage feedback amplifier is shown in Figure P2.24(a). This AC equivalent circuit neglects the bias resistors and the shunt capacitors. A block diagram representing the circuit is shown in FigureP2.24(b). This block diagram neglects the effect of hre, which is usually an accurate approximation, and assumes that R2+RL>>R1. (a) Determine the voltage gain Vo(s)/Vin(s). (b) Determine the current gain ic2/ib1. (c) Determine the input impedance Vin(s)/Ib1(s). Ta(8) 1 R+ hjel Biß2 R1 Vin(s) Vo(s) 8. R2 (1 +B,)R| Vin(8) Vej(s). Vej(8) R1 R + R2 (a) (b) Figure P2.24 Feedback amplifier.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter12: Power System Controls

Section: Chapter Questions

Problem 12.3P

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