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Analog Electronics

Analog Electronics
At the unity-gain frequency, the open-loop voltage gain is

  AV(mid).
  zero.
  1.
  very large

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Analog Electronics
LC oscillators are used for produce a waveform with frequency ranging from

 1 KHz to 1 MHz
 1MHz to 100 GHz
 100 KHz to 500 MHz
 1MHz to 500 MHz

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Analog Electronics
For a diode, reverse recovery time is defined as the time between the instant diode current becomes zero and the instant reverse recovery current decays to

 0.
  25% of reverse peak current.
 10% of reverse peak current.
 15% of reverse peak current.

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Analog Electronics
A 3 - phase diode bridge rectifier is fed from a 400 V rms, 50 Hz, 3 phase AC source. If the load is purely resistive, then peak instantaneous output voltage is equal to

 400√ (2/3) V.
 400 V.
 400 / √ 3 V.
 400√ 2 V.

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Analog Electronics
In a pnp transistor, the major carriers in the emitter are

  holes.
 free electrons.
 neither.
 both.

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Analog Electronics
The Barkhausen criterion for an oscillator

 The phase of a feedback signal with respect to input should be 0° or 360°
 Loop gain should be less than unity
 Loop gain should be unity
 Both A and C

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