Unformatted text preview: simple Zener voltage regulator shown above:
• The reverse Zener voltage, Vz, is 12V.
The Zener resistance, Rz, is 20Ω.
The series current limiting resistance, RS, is 200Ω.
The load resistance, RL, is 800 Ω. a) Redraw the circuit with the Zener diode replaced by the appropriate circuit model.
Include both the forward and reverse branches. Page 5 of 7 b) Calculate the load voltage, VL (i.e., voltage drop across RL) if the unregulated voltage
source, Vs, is 14V. c) Calculate the load voltage, VL (i.e., voltage drop across RL) if the unregulated voltage
source, Vs, is 20V. Page 6 of 7 Problem 5: (8 marks: 2+2+2+2)
16 Voltage SSignal (V) 14
0 0.2 0.4 0.6 0.8 1 Time (s) a) The exact waveform shown above is connected to a digital multimeter (DMM). What
does the DMM read on the DC setting? b) What does the DMM read on the AC setting? c) What is the true RMS value of this waveform? d) What is the frequency of the waveform in Hz? Page 7 of 7...
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