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In TTL logic, the input transistor has a number of ________ equal to the desired fan-in of the circuit.

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In TTL logic, the input transistor has a number of ________ equal to the desired fan-in of the circuit.

(a) Base

(b) Collect

(c) Emitter

(d) Gate

I have been asked this question in an interview for internship.

The question is from Logic Families in section Digital Circuits of Analytical Instrumentation

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Right answer is (c) Emitter

Easiest explanation: In TTL logic, the input transistor has a number of emitters equal to the desired fan-in of the circuit. This is a major advantage.

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