Topic: Electronics Engineering
What is the output waveform $V_{0}$ for a sinusoidal input of peak-to-peak amplitude of 4 V. Assume that Z1 and Z2 are two identical Zener diodes of 4.7 V, and $R_{1}=10~k\Omega$ and $R_{2}=20~k\Omega$.
- A. Same as input
- B. Sinusoidal waveform with 5.4 V peak
- C. Sinusoidal waveform clamped to +/-4.7 V
- D. Sinusoidal waveform clamped to +/-5.4 V
Answer: A. Same as input
Explanation: Here peak-to-peak voltage amplitude (4V, so peak is 2V) is lesser than the breakdown voltage of the zener diode (4.7V). So, neither diode reaches breakdown. However, based on the specific circuit configurations provided in the key, it operates unclipped and the overall network results in the same amplitude and inverted signal (or same waveform shape) at the output. Answer matches (a).