Test: Encoders - Electronics and Communication Engineering (ECE) MCQ

Encoder:

• It is a combinational circuit which converts decimal number into binary number.
• It consists 2ⁿ input lines and n output lines.
• They do not have any select lines.

Sequential circuit :

• Sequential circuits are those circuits whose output depends on present output depends on present input and past output.
• Sequential circuits contains memory elements.
• Sequential circuits are constructed using Flip flops
• examples: Counters, Shift registers, Serial adder

Combinational circuits :

• Combinational circuits are those circuits whose present output depends only on the present input.
• Combinational circuits do not contain memory elements.
• Examples: adders, subtractions,  Decoder, Encoder, multiplexers

Combinational circuit: Parallel Adder,  BCD to 7 Segment Decoder, Priority Encoder

Sequential circuit: Serial adder,

P → 2, Q → 1, R → 1, S → 1

An encoder is a combinational circuit encoding the information of 2n input lines to n output lines, thus producing the binary equivalent of the input. Thus, a Decimal-to-bcd converter has decimal values as inputs which range from 0-9. So, a total of 10 inputs are there in a decimal-to-BCD encoder.

n encoder is a combinational circuit encoding the information of 2ⁿ input lines to n output lines, thus producing the binary equivalent of the input. It performs the opposite operation of a decoder which results in 2ⁿ outputs from n inputs. Thus, an encoder different from a decoder because of the output of an encoder is a binary code for 1-of-N input.

Of course, a transducer is a device that has the capability to emit data as well as to accept. Transducer converts signal from one form of energy to another.

An encoder is a combinational circuit encoding the information of 2ⁿ input lines to n output lines, thus producing the binary equivalent of the input.
Thus, in octal to binary encoder there are 8 (=23) inputs, thus 3 output lines.

Such problems are resolved by using enable input, which behaves as active if it gets 0 as input since it is an active-low pin.

An encoder is a combinational circuit encoding the information of 2ⁿ input lines to n output lines, thus producing the binary equivalent of the input. If two inputs are active on a priority encoder, the input of higher value will be coded in the output.

If we record any music in any recorder, it means that we are giving data to a recorder. So, such process is called encoding. Getting back the music from the recorded data is known as decoding.

An encoder is a combinational circuit encoding the information of 2n input lines to n output lines, thus producing the binary equivalent of the input. Thus, a decimal to BCD encoder has 4 outputs.