Multiple choice

In the circuit shown below, assume that the voltage drop across a forward biased diode is 0.7 V. The thermal voltage Vt = kT/q = 25 mV and small signal input vi = Vp cos $(\omega t)$ where Vp = 100 mV.

The ac output voltage vac is

  1. 0.25cos $(\omega t)$ mV
  2. 1cos $(\omega t)$ mV
  3. 2cos $(\omega t)$ mV
  4. 22cos $(\omega t)$ mV
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B Correct answer
Explanation

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