Question:
The amplifiers X, Y and Z are connected in series. If the voltage gains of X, Y and Z are 10, 20 and 30, respectively and the input signal is 1 mV peak value, then what is the output signal voltage (peak value)
(i) if dc supply voltage is 10V?
(ii) if dc supply voltage is 5V?
Solution:
Voltage gain in X = vx = 10
Voltage gain in Y = vy = 20
Voltage gain in Z = vz = 30
Total voltage amplification = vx.vy.vz = 6V
(i) If dc supply voltage is 10V then the output voltage is 6V
(ii) If dc supply voltage is 5V then the output voltage will exceed 5V