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

An encoder is a combinational logic circuit that converts information from one format or code to another. 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. 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. For 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. \[ \boxed{\text{Octal to binary encoder}} \]