Question

List the limitation of Encoder and explain how this can be rectified by Priority Encoder.

Design a 4:2 Priority Encoder given the priority D3>D1>D0>D2 where all Di’s are input to

the encoder.

Answer 1

The Binary Encoder turns one of two inputs into an n-bit output. The output bits of a binary encoder are then less than those of the input code. One of the primary drawbacks of a typical binary encoder is that if more than one input is active at the same time, it will create an error at the output.

A priority encoder is a circuit or method that compresses numerous binary inputs into fewer outputs. They are frequently used to regulate interrupt requests by acting on the interrupt input with the greatest priority.