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In an astable multivibrator using an op-amp, the feedback factor is 0.5 and the supply voltage is ±12V. What are the quasi-stable output state and the input to the non-inverting terminal?(a) Quasi-stable output = ±12V, Input to non inverting terminal = ±12V(b) Quasi-stable output = ±6V, Input to non inverting terminal = ±12V(c) Quasi-stable output = ±12V, Input to non inverting terminal = ±6V(d) Quasi-stable output = ±12V, Input to non inverting terminal = 0VThe question was posed to me in an interview.Origin of the question is Different Types of Multivibrators topic in portion Multivibrators of Analog Circuits

Answer»

The correct answer is (c) Quasi-stable output = ±12V, Input to non INVERTING terminal = ±6V

The BEST EXPLANATION: Quasi-stable output = ±VSat = ± VSupply = ±12V

Input to non inverting terminal = ±βVSat = ±6V.



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