Describe the function of a decoder circuit; A decoder circuit is a digital logic component that converts a binary input code of 2n  bits into a maximum of   unique output lines, with each output line corresponding to one of the possible combinations of the input code. It "decodes" the binary input into a one-hot (also called one-out-of-n) code, where only one output is active (high) at a time while all others are inactive (low). The primary function of a decoder is to detect specific combinations of inputs and assert the corresponding output line                 Identify the types and quantity of gates needed to implement a 3-to-8 decoder. To implement a 3-to-8 decoder, you need: -Three NOT gates to invert the three inputs if the decoder does not have enable inputs and the implementation requires all minterms. -Eight AND gates, each with three inputs, to generate the eight possible minterms corresponding to the eight different combinations of the three input bits.   So, in total, you need: 3 NOT gates 8 AND gates with 3 inputs each   Either create (or give the location in the text) of a logic diagram of a decoder circuit

Systems Architecture
7th Edition
ISBN:9781305080195
Author:Stephen D. Burd
Publisher:Stephen D. Burd
Chapter4: Processor Technology And Architecture
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Describe the function of a decoder circuit;

A decoder circuit is a digital logic component that converts a binary input code of 2n  bits into a maximum of   unique output lines, with each output line corresponding to one of the possible combinations of the input code. It "decodes" the binary input into a one-hot (also called one-out-of-n) code, where only one output is active (high) at a time while all others are inactive (low).

The primary function of a decoder is to detect specific combinations of inputs and assert the corresponding output line

 

 

            Identify the types and quantity of gates needed to implement a 3-to-8 decoder.

To implement a 3-to-8 decoder, you need:

-Three NOT gates to invert the three inputs if the decoder does not have enable inputs and the implementation requires all minterms.

-Eight AND gates, each with three inputs, to generate the eight possible minterms corresponding to the eight different combinations of the three input bits.

 

So, in total, you need:

3 NOT gates

8 AND gates with 3 inputs each

 

Either create (or give the location in the text) of a logic diagram of a decoder circuit 

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