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・ Binary classification
・ Binary clock
・ Binary code
・ Binary code compatibility
・ Binary collision approximation
・ Binary combinatory logic
・ Binary compound
・ Binary compounds of hydrogen
・ Binary compounds of silicon
・ Binary constraint
・ Binary cycle
・ Binary cyclic group
・ Binary data
・ Binary decision
・ Binary decision diagram
Binary decoder
・ Binary delta compression
・ Binary distribution
・ Binary distribution (disambiguation)
・ Binary Divide
・ Binary Domain
・ Binary economics
・ Binary entropy function
・ Binary erasure channel
・ Binary ethylenimine
・ Binary explosive
・ Binary expression tree
・ Binary file
・ Binary File Descriptor library
・ Binary Finary


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Binary decoder : ウィキペディア英語版
Binary decoder

In digital electronics, a binary decoder is a combinational logic circuit that converts a binary integer value to an associated pattern of output bits. They are used in a wide variety of applications, including data demultiplexing, seven segment displays, and memory address decoding.
There are several types of binary decoders, but in all cases a decoder is an electronic circuit with multiple data inputs and multiple outputs that converts every unique combination of data input states into a specific combination of output states. In addition to its data inputs, some decoders also have one or more "enable" inputs. When the enable input is negated (disabled), all decoder outputs are forced to their inactive states.
Depending on its function, a binary decoder will convert binary information from n input signals to as many as 2n unique output signals. Some decoders have less than 2n output lines; in such cases, at least one output pattern will be repeated for different input values.
A binary decoder is usually implemented as either a stand-alone integrated circuit (IC) or as part of a more complex IC. In the latter case the decoder may be synthesized by means of a hardware description language such as VHDL or Verilog. Widely used decoders are often available in the form of standardized ICs.
==Types==


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