Digital Electronics - ECE Questions and Answers

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T-flip-flop is commonly used as

a delay switch

a digital counter only

a digital counter and frequency divider

any of the above

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In the NMOS inverter

the driver and achieve load are enhancement type

the driver is enhancement type and load depletion type

both driver and load are depletion type

the driver and load are depletion type

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For the switch circuit, taking open as 0 and closed as 1, the expression for the circuit is Y. Y is given by

A + (B + C) D

A + BC + D

A(BC + D)

none of these

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Assuming accumulator contain A 64 and the carry is set (1).What will register A and (CY) contain after RAR?

4 DH, 0

D 3H, 0

4 DH, 1

53 H, 0

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Equipment using BCD numbers

pocket calculators

electronic counter

digital voltmeters

all of the above

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If number of bits is N, the % resolution in analog to digital conversion is

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In a microprocessor system the stack is used for

starting the program return address whenever a subroutine jump instruction is execute

transmitting and receiving input and output data

starting all important CPU register contents whenever an interrupt is to be serviced

storing program instructions for interrupt service routine

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In N channel MOSFET with gate reverse biased, the gate current is of the order

10^-3 amp

10^-6 amp

10^-9 amp

10^-12 amp

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In 8085 microprocessor, a RIM instruction is used to

disable the interrupts 7.5, 6.5, 5.5

enable the interrupts 7.5, 6.5, 5.5

read in the serial input data

none of the above