The function of a multiplexer is

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Answer :

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

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Related questions

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

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

Last 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

Number of control lines required for 16 to 1 multiplexer is

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

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?

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.

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

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

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

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

Define multiplexer

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.

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

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

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

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

Last Answer : a. Multiplexer switching

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

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

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

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Last Answer : multiplexer

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

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

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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

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

An add/drop multiplexer isa ______device. A) one-layerB)two-layerC)three-layerD)four-layer

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

Last Answer : three-layer

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

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

Last Answer : two-layer

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

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

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Last Answer : STS multiplexer/demultiplexer

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

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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

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

The final output of a multiplexer

Description : The final output of a multiplexer

Last Answer : Composite baseband

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

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

Last Answer : c. Backbone bus

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

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

Last Answer : • Implementation • Table • Explanation

. Define multiplexer?

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.

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

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

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

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

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

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

Last Answer : (A) 5.

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

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.

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

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

Last Answer : (B) 4.

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

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

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

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

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

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.)

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

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)

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

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

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

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

Last Answer : (C) Counter

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

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

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

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.

State the necessity of 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.

What is the use of a multiplexer?

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.

One application of a digital multiplexer is to facilitate:

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.

Which of the following function is useful in system requiring error detection and correction codes?

Description : Which of the following function is useful in system requiring error detection and correction codes ? (A) AND-OR (B) OR (C) AND (D) Exclusive -OR

Last Answer : Which of the following function is useful in system requiring error detection and correction codes ? (A) AND-OR (B) OR (C) AND (D) Exclusive -OR

An AND gate will function as OR if

Last Answer : An AND gate will function as OR if all the inputs and outputs are complemented.

List out features of any four addressing modes of 8051.

Description : List out features of any four addressing modes of 8051.

Last Answer : 1.Immediate addressing mode: In this Immediate Addressing Mode, the data is provided in the instruction itself. The data is provided immediately after the opcode. These are some examples of Immediate Addressing Mode. MOVA ... us see some examples of this mode. MOV 0E5H, @R0 MOV @R1, 80H

List out any four assembler directives and state their functions.

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.

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

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.

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

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

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

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

Find out number of data lines required to interface 16 LEDs arrange in the 4 x 4 matrix form.

Description : Find out number of data lines required to interface 16 LEDs arrange in the 4 x 4 matrix form.

Last Answer : 4+4=8, eight lines are required for 4x4 matrix of 16 LEDs

If initial content of accumulator is 44 H, find out the new content of accumulator after execution of the instruction RR A

Description : If initial content of accumulator is 44 H, find out the new content of accumulator after execution of the instruction RR A

Last Answer : Contents of Acc will be 22H ( as RR A divides acc by 2)

Identify direct addressing instructions from following instructions : (i) MOV RO, R5 (ii) MOV RO, 80 H (iii) MOV RO, #75H (iv) ADD A, 45 H

Description : Identify direct addressing instructions from following instructions : (i) MOV RO, R5 (ii) MOV RO, 80 H (iii) MOV RO, #75H (iv) ADD A, 45 H

Last Answer : Instructions ii) and iv) are direct addressing as 80H and 45H are direct addresses

The output of a JK flip-flop with asynchronous preset and clear inputs is ‘1’. The output can be changed to ‘0’

Description : The output of a JK flip-flop with asynchronous preset and clear inputs is ‘1’. The output can be changed to ‘0’ with one of the following conditions by applying A) J = 0, K = 0 and using a clock B) J = 1, K = 0 and using the clock C) Asynchronous preset input D) J = 1, K = 1 and using the clock 

Last Answer : The output of a JK flip-flop with asynchronous preset and clear inputs is ‘1’. The output can be changed to ‘0’ with one of the following conditions by applying J = 1, K = 1 and using the clock