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 10 V?
(ii) If DC supply voltage is 5 V?

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Alok Kumar Singh | Contributor-Level 10

9 months ago

This is a Short Answer Type Questions as classified in NCERT Exemplar

Explanation- as we know total voltage amplification = $\frac{o u t p u t s i g n a l v o l t a g e}{i n p u t s i g n a l v o l t g e}$

Av_x= 10, Av_y= 20, Av_z= 30

$?$ v_i = 1mV= 10^-3V

So according to formula

= (Av_x ) (Av_y ) (Av_z)

$?$ v_o = (Av_x ) (Av_y ) (Av_z) $?$ v_i

= 10^{-3 $* 20 * 30 * 10$} =6V

So in first case output cannot be greate

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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 10 V?(ii) If DC supply voltage is 5 V?