CMOS circuits are made up of transistors to create digital logic circuits.

Electronic Engineering: Digital Systems

Part A:

CMOS circuits are made up of transistors to create digital logic circuits. Explain the term parasitic capacitance its cause and its effect on the circuit.

Part B:

Binary O and 1 values can be represented using a voltage. Given a maximum voltage for TTL technology, suggest appropriate voltages for detecting binary 1 and O. Explain why these values have been chosen for the binary values.

Part C:

Explain the term CMOS and why it is useful to digital circuits. Demonstrate an example of this this technology by drawing a CMOS inverter and describing its behaviour.

Part D:

Transistors use materials that are doped with differing elements to create a semiconductor. Explain how materials are doped to produce this semiconductor material and how this is used to create a NPN transistor and the electrical connections on the transistor.