Define the term 'Multiplexer'. State two examples of multiplexer.

1 Answer

Answer :

A digital multiplexer or data selector is a logic circuit that accepts several (many) digital data inputs and selects one of them at any given time to pass on to the output.

1. Two input multiplexer

2. Four input multiplexer

3. Eight input multiplexer

Related questions

Description : Number of control lines required for 16 to 1 multiplexer is

Last Answer : Number of control lines required for 16 to 1 multiplexer is 4

Last Answer : The function of a multiplexer is To select 1 out of N input data sources and to transmit it to single channel.

Description : Define multiplexer

Last Answer : Multiplexer is a digital switch. If allows digital information from several sources to be routed onto a single output line.

Description : . Define multiplexer?

Last Answer : Multiplexer is a digital switch. If allows digital information from several sources to be routed onto a single output line.

Description : Define multiplexer. Draw logical symbol of 4:1 multiplexer with truth table and output logical equation

Last Answer : Multiplexer - it is a combinational circuit which selects one input from several inputs and connects it to the output.  It is a circuit which has N-input and single output is called as multiplexer.

Description : State the necessity of multiplexer.

Last Answer : A multiplexer (MUX) is a device that selects one of several inputs and forwards the selected input to a single output. It is necessary in situations where multiple signals need to be transmitted ... shared medium, or to split a single stream into multiple signals for processing by separate devices.

Description : Define following terms related to logic families : (i) Noise Margin (ii) FAN-OUT (iii) Propagation delay (iv) Power dissipation

Last Answer : i) Noise immunity is measured in terms of noise margin. High state Noise margin = VNH = VOH(min) - VIH(min) Low state Noise margin = VNL = VIL(max) - VOL(max) i) The fan-out is defined as the ... logical 0 state (HIGH to LOW) iii) Average power dissipation is defined as PD(avg) = ICC(avg) * VCC

Description : Define flip-flop.

Last Answer : Flip Flop: Flip-flop is a circuit which can be turned on and off with the same signal. It is like a single switch button when the first time you press it turns on and when second time you press ... flip-flop like SR flip-flop, D flip-flop, JK flip-flop, SR flip-flop, master-slave flip-flop etc.

Description : An add/drop multiplexer isa ______device. A) one-layer B) two-layer C) three-layer D) four-layer

Last Answer : three-layer

Description : An STS multiplexer is a ______ device. A) one-layer B) two-layer C) three-layer D) four-layer

Last Answer : two-layer

Description : An Arithmetic Logic Unit (ALU) normally contains a number of multiplexer circuits. How many of these might you expect to find in an ALU in a modern CPU chip, and what is their purpose?

Last Answer : answer:FYI, We don’t do homework here. Hint: Realize that an ALU needs to be fed instructions (opcodes) and that they will need to be decoded. This question is also somewhat dated.

Description : ROM has a: a) Decoder followed by encoder b) Multiplexer followed by decoder c) Demultiplexer followed by an encoder d) None of the above

Last Answer : Ans: A

Description : What circuit is responsible in activating and deactivating adjacent antenna elements in a mobile satellite array? A. Radial divider B. Divider/combiner C. Radial combiner D. Radial multiplexer

Last Answer : A. Radial divider

Description : Multiplexing in a time division multiplexer occurs based upon A. the position of a frame within the group of frames B. the positioning of data within a frame C. the priority assigned to a connected device D. the activity of a connected device

Last Answer : B. the positioning of data within a frame

Description : Data transfers are done using: a. Multiplexer switching b. Demultiplexer switching c. Adder switching d. Subtractor switching

Last Answer : a. Multiplexer switching

Description : In RISC architecture access to registers is made as a block and register file in a particular register can be selected by using: a. Multiplexer b. Decoder c. Subtractor d. Adder

Last Answer : b. Decoder

Description : A communications device that combines transmissions from several I/O devices into one line is a a. concentrator b. modifier c. multiplexer d. full-duplex line

Last Answer : multiplexer

Description : Which of the following does not allow multiple uses or devices to share one communication line? a. doubleplexer b. multiplexer c. concentrator d. controller

Last Answer : concentrator

Description : Which of the following might be used by a company to satisfy its growing communications needs? a. front end processor b. multiplexer c. controller d. concentrator e. all of the above

Last Answer : all of the above

Description : _______ allow insertion and extraction of signals. A) regenerators B) ADMs C) STS multiplexer/demultiplexers D) none of the above

Last Answer : regenerators

Description : A ________ is a repeater. A) regenerator B) ADM C) STS multiplexer/demultiplexer D) none of the above

Last Answer : STS multiplexer/demultiplexer

Description : A communication device that combines transmissions from several I/O devices into one line is a A) Concentrator B) Modifier C) Multiplexer D) Full duplex file

Last Answer : C) Multiplexer

Description : Which network component/s is/are involved in the Presentation layer of an OSI model? a. Gateway b. Multiplexer & Oscilloscope c. Amplifier & Hub d. All of the above

Last Answer : a. Gateway

Description : The final output of a multiplexer

Last Answer : Composite baseband

Description : Which is called superhighway: a. Processor b. Multiplexer c. Backbone bus d. None of these

Last Answer : c. Backbone bus

Description : Implement F(A,B,C,D)= Ʃ (1,3,4,11,12,13,14,15) using multiplexer

Last Answer : • Implementation • Table • Explanation

Description : A communication device that combines transmissions from several I/O devices into one line is a A) Concentrator B) Modifier C) Multiplexer D) Full duplex file

Last Answer : C) Multiplexer

Description : A communication device that combines transmissions from several I/O devices into one line is a A) Concentrator B) Modifier C) Multiplexer D) Full duplex file

Last Answer : C) Multiplexer

Description : How many select lines will a 32:1 multiplexer will have (A) 5. (B) 8. (C) 9. (D) 11.

Last Answer : (A) 5.

Description : The number of control lines for 32 to 1 multiplexer is (A) 4. (B) 5. (C) 16. (D) 6.

Last Answer : Ans: B The number of control lines for 32 (2^5) and to select one input among them total 5 select lines are required.

Description : The number of control lines for 16 to 1 multiplexer is (A) 2. (B) 4. (C) 3. (D) 5.

Last Answer : (B) 4.

Description : The commercially available 8-input multiplexer integrated circuit in the TTL family is (A) 7495. (B) 74153. (C) 74154. (D) 74151.

Last Answer : Ans: B MUX integrated circuit in TTL is 74153.

Description : How many select lines will a 16 to 1 multiplexer will have (A) 4 (B) 3 (C) 5 (D) 1

Last Answer : (A) 4

Description : A device which converts BCD to Seven Segment is called (A) Encoder (B) Decoder (C) Multiplexer (D) Demultiplexer

Last Answer : Ans: B A device which converts BCD to Seven Segment is called DECODER. (A decoder coverts binary words into alphanumeric characters.)

Description : The device which changes from serial data to parallel data is (A) COUNTER (B) MULTIPLEXER (C) DEMULTIPLEXER (D) FLIP-FLOP

Last Answer : Ans: C The device which changes from serial data to parallel data is demultiplexer. (A demultiplexer takes in data from one line and directs it to any of its N outputs depending on the status of the select inputs.)

Description : The number of control lines for a 8 – to – 1 multiplexer is (A) 2 (B) 3 (C) 4 (D) 5

Last Answer : Ans: B The number of control lines for an 8 to 1 Multiplexer is 3 (The control signals are used to steer any one of the 8 inputs to the output)

Description : A terminal multiplexer has six 1200 bps terminals and ‘n’ 300 bps terminals connected to it. If the outgoing line is 9600 bps, what is the value of n ? (A) 4 (B) 8 (C) 16 (D) 28

Last Answer : (B) 8

Description : Which of the following is a sequential circuit? (A) Multiplexer (B) Decoder (C) Counter (D) Full adder

Last Answer : (C) Counter

Description : A multiplexer combines four 100-Kbps channels using a time slot of 2 bits. What is the bit rate? (A) 100 Kbps (B) 200 Kbps (C) 400 kbps (D) 1000 Kbps

Last Answer : (C) 400 kbps

Description : What is the use of a multiplexer?

Last Answer : Uses of multiplexers are as follows: Multiplexers are use in computer memory. Multiplexers are use for data routing. Multiplexers are use for parallel to serial conversion.

Description : One application of a digital multiplexer is to facilitate:  (1) Code conversion (2) Parity checking (3) Parallel-to-serial data conversion (4) Data generation

Last Answer : One application of a digital multiplexer is to facilitate: Parallel-to-serial data conversion.

Description : List out any four assembler directives and state their functions.

Last Answer : ORG directive: It is used to specify starting address of the Program. A 16bit address follows ORG ORG 0020H will start program from 0020H memory location.  END directive: It indicates end of the ... that when the label appears in the program, itp constant value will be substituted for the label.

Description : State functions of preset, clear, clock and SR inputs related to SR flip flop.

Last Answer : Preset Input: is an asynchronous input to set the Q output to 1 Clear Input: is also asynchronous input to reset the Q output to 0 Clock Input: is used to input external logic clock pulse (HIGH-LO) to ... set the Q output. And R is the reset input which is used to reset Q output of the flipflop.

Description : State Demorgan's theorem's and prove both theorems using truth table.

Last Answer : De Morgan's 1st theorem states that when the OR sum of two variables is inverted, this is the same as inverting each variable individually and then ANDing these inverted variables. De Morgan's 2nd ... individually and then ORing them. In Boolean equation form it can be written as

Description : Logic state 0 in positive logic corresponds to   1. zero voltage 2. positive voltage 3.higher voltage level 4. lower voltage level 

Last Answer : Logic state 0 in positive logic corresponds to lower voltage level 

Description : In a JK flip-flop, for what input next state is complement of the present state (A)J=0,K=0 (B)J=1,K=0 (C)J=0,K=1 (D)J=1,K=1

Last Answer : In a JK flip-flop, for what input next state is complement of the present state (A)J=0,K=0 (B)J=1,K=0 (C)J=0,K=1 (D)J=1,K=1

Description : Define the term road-density. Explain with examples the two main determinants of road density in India. -Geography

Last Answer : Road density is the length of roads per 100 sq kms of an area. Determinants of road density are level of economic development and nature of terrain. (i) Construction of roads is ... roads is relatively better in plains as compared to roads in high altitude areas, rainy and forested areas.

Description : Define the term Taxon. Give some examples of taxa at different hierarchical levels.

Last Answer : Define the term Taxon. Give some examples of taxa at different hierarchical levels.

Description : How many minimum number of NOR gates are required to realize a two-input X-OR gate?

Last Answer : 5

Description : A bulb in a staircase has two switches, one switch being at the ground floor and the other one at the first floor. The bulb can be turned ON and also can be turned OFF by any one of the switches irrespective of the ... bulb resembles  (A) and AND gate (B) an OR gate (C) an XOR gate (D) a NAND gate

Last Answer : A bulb in a staircase has two switches, one switch being at the ground floor and the other one at the first floor. The bulb can be turned ON and also can be turned OFF by any one of the switches irrespective of the state of the other switch. The logic of switching of the bulb resembles an XOR gate