Question

Draw transistor level design of a combinational logic F= ABC + DE

in pass transistor logic. Assume complementary inputs are available and you are allowed to use the inverter symbol in the design. Minimize the number of transistors

Answer 1

A transistor-level design of a combinational logic circuit F=ABC+DE in pass transistor logic, with minimized number of transistors.

Step-by-step explanation:

Transistor-level design of a combinational logic circuit F=ABC+DE can be implemented using pass transistor logic by using a combination of transistor switches. Here's the step-by-step process to minimize the number of transistors:

1. Create a pull-up network with separate transistors for each term and the complement of each term, connected in parallel.
2. Create a pull-down network with separate transistors for each term and the complement of each term, connected in parallel.
3. Combine the pull-up and pull-down networks by using an inverter and connecting the output of the inverter to the pull-down network and the complement of the output to the pull-up network.

In this design, the number of transistors can be minimized by utilizing the complement of inputs and sharing transistors across terms that have similar input patterns.