The amplifiers X, Y and Z are connected in series.

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

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