Digital Logic Lecture 10 Combinational Logic: Decoders, Encoders, and Multiplexers

Digital Logic Lecture 10 Combinational Logic: Decoders, Encoders, and Multiplexers By Ghada Al-Mashaqbeh The Hashemite University Computer Engineerin...
Author: Lee Blake
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Digital Logic Lecture 10

Combinational Logic: Decoders, Encoders, and Multiplexers By Ghada Al-Mashaqbeh The Hashemite University Computer Engineering Department

Outline 

  

Introduction. Decoders. Encoders. Multiplexers.

The Hashemite University

2

Introduction 



In this lecture we will complete viewing the standard combinational circuits. Specifically, we will study:   

Decoders. Encoders. Multiplexers.

The Hashemite University

3

Decoders I 



 

Decoder is a combinational circuit that converts a binary value to a specific binary code  one to one mapping. Remember that an n-bit binary code can represents up to a 2n binary codes. So, a decoder has the binary code as an input and the original binary value as the output. For an n-bit binary code, the decoder has n inputs and a maximum 2n outputs (may have fewer outputs if you have unused codes as in BCD). The Hashemite University

4

Decoders II  

We will study the n-to-m-line decoders where m

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