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WHAT IS DECODER AND ITS TYPES

Decoder is a combinational circuit that converts binary informaCIRCUIT DIAGRAM OF 2-TO-4 LINE DECODER WITH ACTIVE HIGH ENABLE INPUT AND ACTIVE HIGH OUTPUTtion from n coded inputs to a maximum of 2unique outputs. If n-bit coded information has unused combinations, it may have less than 2outputs. The Decoders are called n-to-m line Decoders, where m≤2n. In the logic diagram of a 2-to-4 line Decoder, the two data inputs A and B are decoded into four outputs, each output representing one of the combinations Of the binary input variables .The inverts provide the compliment of the inputs, and each of the four AND Gates generates one of the binary combinations. It has one enable input represented by EN. The decoder is enabled when EN is equal to 1 and disabled when EN is equal to 0 and this condition of enable input is called Active high enable input.  (more…)