The output of the circuit shown will be of frequency______.

F1 S.B Madhu 05.03.20 D1

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VSSC ISRO Technical Assistant Electronics 8 Feb 2015 Official Paper
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  1. 125 Hz
  2. 250 Hz
  3. 375 Hz
  4. 500 Hz

Answer (Detailed Solution Below)

Option 1 : 125 Hz
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Detailed Solution

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Concept:

If we pass the input signal to a single T-flip flop, we will get half of the frequency at the output.

Assignment 8 Soumya UPPCL AE EC 2016 10  2

Assignment 8 Soumya UPPCL AE EC 2016 10  3

Similarly, when we pass the input signal into an n-bit flip flop counter, the output frequency (fout) will be:

\({{\rm{f}}_{{\rm{out}}}} = \frac{{{\rm{Input\;Frequency}}}}{{{2^{\rm{n}}}}}\)

Application:

Given Input frequency f = 1 kHz

\({{\rm{f}}_{{\rm{out}}}} = \frac{{{\rm{Input\;frequency}}}}{{{2^{\rm{n}}}}} = \frac{{1{\rm{000~Hz}}}}{{{2^3}}}\)

fout = 125 Hz

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