题目内容

The ripple factor of a sinusoidal signal having peak ripple of 2 V on an average of 50 V is ( ).

A. 0.028
B. 0.28
C. 0.04
D. 0.4

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The gain of an amplifier changes from a value of -1000 by 10%. If the amplifier is used in a feedback circuit having F=-1/20, the gain change is about ().

A. 20%
B. 0.2%
C. 1%
D. 0.1%

The unit of measure for FET transconductance () is ().

A. ohms per volt
B. volts per ampere
C. Siemens
D. unitless

A class AB amplifier ().

A. conducts through 180〫of the input waveform
B. conducts between 180〫and 360〫of the input waveform, depending on the amount of dc bias
C. conducts through less than 180〫of the input waveform
D. works only with digital and pulsed waveforms

To get a current-voltage conversion circuit, () should be introduced in the amplifier circuit.

A. current-series negative feedback
B. current-shunt negative feedback
C. voltage-series negative feedback
D. voltage-shunt negative feedback

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