VcC RC R1 +VL CI RL RE Vi R2 CE RE2
Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Russell E. Smith
Chapter17: Commercial And Industrial Air-conditioning Control Systems
Section: Chapter Questions
Problem 22RQ
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In the circuit given in the figure, Vcc = 30V, R1 = 150K ohm, R2 = 47K ohm, RL = 20K ohm and transistor parameters are given as VBE = 0.6 V, beta (dc) = beta (0) = 300. The hybrid model of the transistor will be used.
a) It is given as I (CQ) = 2mA and V (CEQ) = 10V at the operating point. Since the input impedance of the circuit must be Zi = 20K ohms, calculate the resistance values of R (E1), R (E2) and R (C).
b) Derive the voltage gain expression A (vi) and calculate its value.
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