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Given that the feedback factor of an astable multivibrator is 0.3, find the frequency of the output.

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Given that the feedback factor of an astable multivibrator is 0.3, find the frequency of the output.

(a) 22Hz

(b) 20kHz

(c) 20Hz

(d) 40Hz

I have been asked this question by my college director while I was bunking the class.

I'd like to ask this question from Different Types of Multivibrators in division Multivibrators of Analog Circuits

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Correct answer is (c) 20Hz

Easiest explanation: TO = 2RCln (1 + β/1-β) = 2RCln(1.3/0.7) = 2x10x4x10^-3x0.619 = 49.52ms

f = 1/TO = 20Hz.

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