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Transcript
```ETEE3211
Fall 2004
Test #1
Name:__________________
Show all work. Clearly indicate final answer(s).
1. (15 points) A silicon diode is placed in a circuit and is operating at 85oC. At 25oC the diode
has a 0.68V drop. What is the voltage drop of the diode when in the circuit?
2. (25 points) For the circuit shown to the right,
sketch (and explain clearly) the output voltage
waveform vout when the input voltage (vs) is a
100Vrms sine wave. Use VON=0.7V and Rf=0.
3. (30 points) Determine the value of the capacitor
needed to provide filtering for the circuit shown so
that the voltage does not drop below 12V. Assume
Rf=0 and VON=0.7V. Sketch the output waveform.
4. ( 30 points) The zener regulator shown uses a
20V zener diode to maintain a constant 20V