ENGR-356 Electronics - HW# 9 Due Friday 02/07/20
1) In class we started a problem based on the circuit in figure 4.25,
i.e. a peak-rectifier circuit (half wave). For this problem assume that CR>>T
meaning a linear drop of capacitor voltage between peaks. Other
assumptions are: 500 ohm load, 10v RMS Vin, ideal diode with 0.7v
forward drop.
a) what capacitor value should be used if Vripple p-p is 10%?
b) what average output voltage results?
c) what fraction of the cycle does the diode conduct?
d) what is the peak diode current?
e) if 1% ripple is desired, what value of capacitor is needed?
f) for 1% ripple, what is the peak diode current?
2) If instead of half wave rectification we were to use full wave
rectification as shown in figure 4.22:
a) what capacitor value should be used if Vripple p-p is 10%?
b) what is the peak diode current?
3) A voltage regulator is often needed in a power supply after
rectification and filtering. A shunt regulator using a zener
diode is the simplest circuit for this. Do problem 4.63. (Example
4.7 is similar)
Begin reading in chapter 6 per the reading assignment (we are doing
chapter 6 before chapter 5).
Be ready for a quiz.
Larry Aamodt PhD, PE
Professor of Engineering and Computer Science
Walla Walla College
Contact:
via email: AamoLa (at) wallawalla.edu
via phone: x2058