Q. 3.18: Draw a logic diagram using only two-input NOR gates to implement the following function:

Students are introduced to a problem-solving series focused on digital electronics, where various problems will be addressed and solved.

Implementing Logic Functions with NOR Gates The task involves creating a logic diagram using only two-input NOR gates to implement the function A'B + C'D + CD. The expression is expanded and simplified through Boolean algebra, leading to terms that can be mapped onto a four-variable Karnaugh map for further simplification. By identifying zero values in the K-map, we derive an initial complement of the function which aids in constructing the final logic circuit.

Finalizing Circuit Design Using Only Two-Input Gates To finalize our design using only two-input NOR gates, we apply De Morgan's theorem on derived expressions while ensuring all operations conform to available gate types. This process includes taking multiple complements strategically until reaching a form suitable for implementation without AND operations directly present. Ultimately, this results in an efficient configuration of interconnected NOR gates representing the original logical operation accurately.

To implement a logic circuit with four inputs (A, B, C, D), inverters are used to create complements of the inputs. The NOR gate is employed to combine these complemented signals into a single output function. By applying De Morgan's theorem and using additional NOR gates strategically, the final expression simplifies down to an OR operation through inversion processes. This results in a complete logic diagram representing the desired function based on input combinations.