Encoder

An encoder is a type of digital circuit that converts the language of the user into machine-readable language.

Encoder

In an encoder, we have to give a 2n input line and from this, we will get n output line.

Know about the decoders in Digital electronics. 

8 to 3 line encoder

In every situation in this table, we see only a single output 1, and others are 0. For 8 line input, we get 3 line outputs.

Encoder table

Inputs								Outputs
Q₀	Q₁	Q₂	Q₃	Q₄	Q₅	Q₆	Q₇	A	B	C
1	0	0	0	0	0	0	0	0	0	0
0	1	0	0	0	0	0	0	0	0	1
0	0	1	0	0	0	0	0	0	1	0
0	0	0	1	0	0	0	0	0	1	1
0	0	0	0	1	0	0	0	1	0	0
0	0	0	0	0	1	0	0	1	0	1
0	0	0	0	0	0	1	0	1	1	0
0	0	0	0	0	0	0	1	1	1	1

Here we get 3 Equations from the output

1. A = Q₄+Q₅+Q₆+Q₇
2. B = Q₂+Q₃+Q₆+Q₇
3. C = Q₁+Q₃+Q₅+Q₇

Block diagram of an encoder

Use of encoder

• Can covert Alphanumeric letters to BCD, ASCII, and UNICODE, etc
• In controlling the IRQ( Interrupt Request ) in the microprocessor
• In robotics