Question

Design a multi-purpose 2-input logic gate that works as an XOR gate, an OR gate, a NOR gate and also as an XNOR gate, based on the status of certain control inputs. And draw circuit

Answer 1

A multi-purpose 2-input logic gate can be designed using a combination of basic logic gates (OR, XOR, NOR, XNOR) and a 4-to-1 multiplexer, with two control inputs (C0 and C1) to select the desired operation.

Step-by-step explanation:

Designing a multi-purpose 2-input logic gate involves creating a circuit that can perform multiple logical operations (XOR, OR, NOR, XNOR) based on additional control inputs. To achieve this functionality, one could use a combination of basic logic gates and multiplexers. Here's an example setup:

• A basic 2-input OR gate.
• A basic 2-input XOR gate.
• A basic 2-input NOR gate.
• A basic 2-input XNOR gate.
• Two control inputs (let's call them C0 and C1) to control which gate's output is selected.
• A 4-to-1 multiplexer that takes the outputs from the four gates as its data inputs, and the control inputs C0 and C1 as selection lines to choose which operation is active.

To use the designed circuit, set the control inputs C0 and C1 to the desired operation: '00' for XOR, '01' for OR, '10' for NOR, and '11' for XNOR. The multiplexer will channel the corresponding logic gate's output to the final output based on the control inputs.