Electronic Devices and Circuits MCQs with answers Page - 24

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Q. An open-collector TTL gate

  • (A) can sink current but cannot source current.
  • (B) can source current but cannot sink current.
  • (C) cannot source or sink current.
  • (D) can sink more current than a standard ttl gate.

A

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Q. The minimum input voltage recognized as a HIGH by a TTL gate is

  • (A) 0.8 v.
  • (B) 2.4 v.
  • (C) 2.0 v.
  • (D) 5.0 v

A

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Q. Which of the following digital IC logic families is most susceptible to static discharge?

  • (A) rtl
  • (B) ecl
  • (C) mos
  • (D) ttl

A

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Q. The time it takes for an input signal to pass through internal circuitry and generate the appropriate output effect is known as

  • (A) propagation delay
  • (B) rise time
  • (C) fan-out
  • (D) fall time

A

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Q. An amplifier without feedback has a voltage gain of 50, input resistance is 1 KΩ & Output resistance of 2.5KΩ.The input resistance of the current-shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.2 is

  • (A) 1/11kΩ
  • (B) 1/5kΩ
  • (C) 5kΩ
  • (D) 11kΩ

A

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Q. The fan out of a MOS logic gate is higher than that of TTL gates because of its

  • (A) low input impedance
  • (B) high output impedance
  • (C) low output impedance
  • (D) high input impedance

A

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Q. Transformer coupling can be used in amplifiers

  • (A) only power
  • (B) only voltage
  • (C) either power or voltage
  • (D) neither power nor voltage

A

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Q. When negative current feedback is applied to an amplifier, its output impedance

  • (A) increases
  • (B) remains unchanged
  • (C) decreases
  • (D) becomes zero

A

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Q. The quiescent current of a FET amplifier is

  • (A) ids
  • (B) id
  • (C) id
  • (D) id

A

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Q. The total decibel voltage gain of two cascaded voltage amplifier where individual voltage gains are 10 and 100 is

  • (A) 20
  • (B) 60
  • (C) 800
  • (D) 1000

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