Computer Programming MCQs

5739 MCQs  (Page 205 of 574)

Hysteresis is desirable in Schmitt-trigger, because______________?
A. Energy is to be stored/discharged in parasitic capacitances
B. Effects of temperature would be compensated
C. Devices in the circuit should be allowed time for saturation and desaturation
D. It would prevent nosie from causing false triggering
The two input terminals of an opamp are labeled as______________?
A. high and low
B. positive and negative
C. inverting and non inverting
D. differential ans non differential
Differential amplifiers are used in______________?
A. instrumentation amplifiers
B. voltage followers
C. voltage regulators
D. buffers
For an ideal op-amp, which of the following is true?
A. the differential voltage across the input terminals is zero
B. the current into the input terminals is zero
C. the current from output terminal is zero
D. the output resistance is zero
When a step-input is given to an op-amp integrator, the output will be______________?
A. a ramp
B. a sinusoidal wave
C. a rectangular wave
D. a triangular wave with dc bias
Which of the following amplifier is used in a digital to analog converter?
A. non inverter
B. voltage follower
C. summer
D. difference amplifier