encoder

views updated

encoder
1. The means by which an encoding process is effected (see code). It may be implemented in hardware or software, the process being algorithmic in nature.

2. A logic circuit, usually an integrated circuit, that generates a unique n-bit binary word, indicating which of its 2n input lines is active, i.e. at logic 1. A keyboard encoder, for example, may be required to generate a unique binary code indicating which key on the keyboard has been pressed.

If two or more of the device inputs can be active simultaneously then a priority encoder is required, which usually encodes only the highest-order data input.

More From encyclopedia.com