 ## Thursday, February 14, 2019

### DIGITAL ELECTRONICS (Objective Questions With Answers)

 It is required to construct a counter to count upto 100(decimal). The minimum number of flipflops required to construct the counter is
A. 8
B. 7
C. 6
D. 5

 The gate that assumes the 1 state, if and only if the input does not take a 1 state is calleD........
A. AND gate
B. NOT gate
C. NOR gate
D. Both b and c

 For NOR circuit SR flip flop the not allowed condition is....
A. S=0, R=0
B. S=0, R=1
C. S=1, R=1
D. S=1, R=0

 A bistable multivibrator is a
A. Free running oscillator
B. Triggered oscillator
C. Saw tooth wave generator
D. Crystal oscillator

 For a large values of |VDS|, a FET behave as
A. Voltage controlled resistor
B. Current controlled current source
C. Voltage controlled current source
D. Current controlled resistor

 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

 In a full-wave rectifier without filter, the ripple factor is
A. 0.482
B. 1.21
C. 1.79
D. 2.05

Hysteresis is desirable in Schmitt-trigger, because
A. Energy is to be stored/discharged in parasitic capacitance
B. Effects of temperature would be compensated
C. Devices in the circuit should be allowed time for saturation and desaturation
D. It would prevent noise from causing false triggering

 For a 10-bit DAC, the Resolution is defined by which of the following
a) 1024
b) 1/1024
c) 10
d) None

 SRAM full form is
b) Static Random Access Memory