An Encoder is a computational circuit that performs the reverse operation of Decoder. It has a maximum of 2n input lines and ‘n’ output lines.
So, It will produce a binary code equivalent to the input, which is active High.
Meanwhile, the encoder encodes 2n input lines with ‘n’ bits. It is optional to represent the enable signal in encoders.
An encoder is a device, circuit, transducer, software program, algorithm or person that converts information from one format or code to another, for the purpose of standardization, speed or compression.
However, Transducers (such as optical or magnetic encoders) sense position or orientation for use as a reference or active feedback to control position:
- A rotary encoder converts rotary position to an analogue (e.g., analogue quadrature) or digital (e.g., digital quadrature, 32-bit parallel, or USB) electronic signal.
- A linear encoder similarly converts linear position to an electronic signal.
Such encoders can be either absolute or incremental. The signal from an absolute encoder gives an unambiguous position within the travel range without requiring knowledge of any previous position.