Question

The 8-to-3 encoder is also called

• A. Octal to binary encoder
• B. Excess-3 encoder
• C. Quadruple encoder
• D. Mixed encoder

Hint:

An encoder converts a set of \(2^n\) input lines (where typically only one is active) into an n-bit binary code.
An 8-to-3 encoder converts 8 input lines (representing octal 0-7) to a 3-bit binary output.

Answer 1

The Correct Option is A

8-to-3 Line Encoder Analysis 

This document describes the functionality of an 8-to-3 line encoder.

Encoder Definition: An encoder is a combinational logic circuit that converts information from one format or code to another.

8-to-3 Line Encoder: An 8-to-3 line encoder has 8 input lines and 3 output lines. Typically, only one of the 8 input lines is active (HIGH) at any time, and the encoder produces a 3-bit binary code corresponding to the active input line.

Octal Digit Representation: The 8 input lines can represent the octal digits (0 to 7). The 3 output lines can represent the 3-bit binary equivalent of these octal digits.

Example:

• Input line 0 active \(\rightarrow\) Output 000
• Input line 1 active \(\rightarrow\) Output 001
• ...
• Input line 7 active \(\rightarrow\) Output 111

This functionality is precisely that of an Octal-to-Binary encoder.

(b) Excess-3 encoder would produce Excess-3 code.

(c), (d) are not standard terms for an 8-to-3 encoder.

Conclusion: \(\boxed{\text{Octal to binary encoder}}\)