An encoder is a device used to change a signal (such as a
bitstream) or datainto a code. The code may serve any of a number of purposes such as compressing information for transmission or storage, encryptingor adding redundancies to the input code, or translating from one code to another. This is usually done by means of a programmed algorithm, especially if any part is digital, while most analog encoding is done with analog circuitry.
ingle bit 4 to 2 Encoder
An encoder has 2n input lines and "n" output lines.The output lines generate a binary code corresponding to the input value. For example a single bit 4 to 2 encoder takes in 4 bits and outputs 2 bits. It is assumed that there are only 4 types of input signals these are : 0001, 0010, 0100, 1000.
Connecting Priority Encoders
Priority encoders can be easily connected in arrays to make larger encoders, such as a 16 to 4 encoder made from six 4 to 2 priority encoders (four encoders having the signal source connected to their inputs, and two encoders that take the output of the first four as input).
* A compressor encodes data (e.g., audio/video/images) into a smaller form.
multiplexercombines multiple inputs into one output.
rotary encoderconverts rotary position to an analog (e.g., analog quadrature) or digital (e.g., digital quadrature, 32-bit parallel, or USB) electronic signal.
linear encodersimilarly converts linear position to an electronic signal.
* Redundancy in databases
* Encoding data to an ID Card: [https://www.arcadiaid.com/page.php?page=magneticstripeencoder Using a Magnetic Stripe Encoder]
* [http://engknowledge.com/shaft_absolute_encoder_gray_code.aspx Absolute Encoder Using Gray Code] - Absolute encoding for rotating shaft, with a comprehensive discussion of gray code.
* [http://www.asic-world.com/digital/combo3.html asic-world's Digital Combinational Logic (part III)] - an overview of encoders in circuitry.
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