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A TTL gate may operate inadvertently as an ____________

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A TTL gate may operate inadvertently as an ____________

(a) Digital amplifier

(b) Analog amplifier

(c) Inverter

(d) Regulator

This question was addressed to me in a job interview.

Question is taken from Transistor Transistor Logic(TTL) topic in chapter Logic Families of Digital Circuits

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Correct choice is (b) Analog amplifier

Easy explanation: A TTL gate may operate inadvertently as an analog amplifier if the input is connected to a slowly changing input signal that traverses the unspecified region from 0.7V to 3.3V.

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