GATE (Graduate Aptitude Test in Engineering) Electronics: Questions 76 - 79 of 271

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Question number: 76

» Digital Circuits » Number Systems; Combinatorial Circuits » Logic Gates and Their Static CMOS Implementation

Appeared in Year: 2009

MCQ▾

Question

If X = 1 in logic equation

Equation , then

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 77

» Digital Circuits » 8-Bit Microprocessor (8085) » Memory and I-O Interfacing

Appeared in Year: 2007

MCQ▾

Question

An 8255 chip is interfaced to an 8085 microprocessor system as an I/O mapped I/O as show in the figure. The address lines Equation and Equation of the 8085 are used by the 8255 chip to decode internally its three ports and the Control register. The address lines Equation to Equation as well as the Equation signal be used for address decoding. The range of addresses for which the 8255 chip would get selected is

An 8255 chip is interfaced to an 8085 microprocessor system

An 8255 Chip Is Interfaced to an 8085 Microprocessor System

An 8255 chip is interfaced to an 8085 microprocessor system as an I/O mapped I/O.

Choices

Choice (4) Response

a.

F8H - FFH

b.

F8GH - FCH

c.

F8H - FBH

d.

F0H - F7H

Question number: 78

» Digital Circuits » Number Systems; Combinatorial Circuits » Logic Gates and Their Static CMOS Implementation

Appeared in Year: 2004

MCQ▾

Question

A digital system is required to amplify a binary-encoded audio signal. The user should be able to control the gain of the amplifier from minimum to a maximum in 100 increments. The minimum number of bits required to encode, in straight binary, is

Choices

Choice (4) Response

a.

6

b.

7

c.

5

d.

8

Question number: 79

» Digital Circuits » Sequential Circuits » Counters

Appeared in Year: 2011

MCQ▾

Question

The output of a 3-stage Johnson (twisted ring) counter is fed to a digital-to analog (D/A) converter as shown in the figure below. Assume all states of the counter to be unset initially. The waveform which represents the D/A converter output Equation is

The combinational circuit consisting Johnson counter and DAC

The Combinational Circuit Consisting Johnson Counter and DAC

The combinational circuit consisting 3 stage Johnson counter and digital to analog converter

Choices

Choice (4) Response

a.

The waveform which represents the DAC converter output Choice:A

The Waveform Which Represents the DAC Converter Output Choice: A

The waveform which represents the DAC converter output

b.

The waveform which represents the DAC converter output Choice:B

The Waveform Which Represents the DAC Converter Output Choice: B

The waveform which represents the DAC converter output

c.

The waveform which represents the DAC converter output Choice:C

The Waveform Which Represents the DAC Converter Output Choice: C

The waveform which represents the DAC converter output

d.

The waveform which represents the DAC converter output Choice:D

The Waveform Which Represents the DAC Converter Output Choice: D

The waveform which represents the DAC converter output

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