A Digitrax DH163AT DCC decoder in an Athearn locomotive before the shell goes on.

A decoder is a device which does the reverse of an encoder, undoing the encoding so that the original information can be retrieved. The same method used to encode is usually just reversed in order to decode. Image File history File linksMetadata DCC_Decoder. ... Image File history File linksMetadata DCC_Decoder. ... To meet Wikipedias quality standards, this article or section may require cleanup. ... A Digitrax DCC system Digital Command Control (DCC) is a scheme for controlling locomotives on a model railroad layout that allows one or more locomotives to be independently controlled on the same electrical section of track. ... Athearn makes model railroad equipment and is a subsidiary of Horizon Hobbies. ... An encoder is a device used to encode a signal (such as a bitstream) or data into a form that is acceptable for transmission or storage. ...

In digital electronics this would mean that a decoder is a multiple-input, multiple-output logic circuit that converts coded inputs into coded outputs, where the input and output codes are different. e.g. n-to-2ⁿ, BCD decoders. A logic gate performs a logical operation on one or more logic inputs and produces a single logic output. ...

Enable inputs must be on for the decoder to function, otherwise its outputs assume a single "disabled" output code word. Decoding is necessary in applications such as data multiplexing, 7 segment display and memory address decoding. In telecommunications, multiplexing (also muxing or MUXing) is the combining of two or more information channels onto a common transmission medium using hardware called a multiplexer or (MUX). ... In psychology, memory is the ability of an organism to store, retain, and subsequently recall information. ...

The simplest decoder circuit would be an AND gate because the output of an AND gate is "High" (1) only when all its inputs are "High". A logic gate performs a logical operation on one or more logic inputs and produces a single logic output. ...

Example: A 2-to-4 Line Single Bit Decoder

A slightly more complex decoder would be the n-to-2ⁿ type binary decoders. These type of decoders are combinational circuits that convert binary information from 'n' coded inputs to a maximum of 2ⁿ unique outputs. We say a maximum of 2ⁿ outputs because in case the 'n' bit coded information has unused bit combinations, the decoder may have less than 2ⁿ outputs. We can have 2-to-4 decoder, 3-to-8 decoder or 4-to-16 decoder. We can form a 3-to-8 decoder from two 2-to-4 decoders. Image File history File links Decoder_Example. ... Image File history File links Decoder_Example. ... Binary coding is the term used to describe how information, normally numbers, are stored in binary, radix-2 form. ... A bit (binary digit) refers to a digit in the binary numeral system (base 2). ...

See also

• endec