Question

What is a combinational circuit what are the steps involved in the design of a combinational circuit?

Answer 1

The Electronics engineers should know the steps to design a particular circuit. While we study, we directly study the properties of the electronic block and the circuit diagram of the corresponding block. We never think how had we landed up to that particular circuit diagram. For example when we talk about digital Multiplexer, Decoder or Counters; we directly find the block diagrams and the circuit diagrams of these modules. And we never think about the design process. So, in interviews, students fail to design a simple combinational logic. Though this post seems to be a simple one, and few may find nothing new is here; but I thought of posting this as it would help the newbies and also to them who wand to revisit the concept of designing a combinational circuit.

Steps to be Followed:

Understand the problem statement (realize how the outputs of the circuit depend on the inputs to the circuit)

Draw the Truth Table (Truth Table establishes the relationship between the outputs and inputs for all the possible input combinations)

Derive the minimized Boolean Expressions for the outputs w.r.t. the inputs (You can use the K-Map method)

From the Boolean expressions draw the logic circuit

Answer 2

Explanation:

A circuit is a closed loop that electrons can travel in. A source of electricity, such as a battery, provides electrical energy in the circuit. Unless the circuit is complete, that is, making a full circle back to the electrical source, no electrons will move.