sinusoidal outputs

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Russell E. Smith
Chapter11: Thermostats, Pressure Switches, And Other Electric Control Devices
Section: Chapter Questions
Problem 23RQ
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Multiple choice questions :

95.Most relaxation oscillators produce sinusoidal outputs. T or F ___

(T) True
(F)False
 
94.The crystal oscillator is based on the photoelectric effect. T or F ___
 
93.The voltage gain around the closed feedback loop must be greater than 1 to sustain oscillations. T or F ___
 
92.In the IC phase-shift oscillator, what should the ratio of feedback resistor RF to R1 be?
A. Any value
B. Zero
C. Greater than –29
D. Less than 29
 
92.The start-up gain of an oscillator must be ________ one.
A. less than
B. greater than
C. None of the above
D. equal to
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