Overview
(Details in the file) CMOS technology is widely used to implement digital circuits because of its low power requirements, small feature size (high transistor density), ease of manufacture, available design tools, scalable parameters, and mature fabrication processes. CMOS technology is used in the implementation of discrete logic gates (40XX, 74CXX, 74ACLXX, 74HCLXX, etc. series), programmable logic devices, field programmable gate arrays, microprocessors/microcontrollers, custom VLSI logic, etc. Because CMOS is such an important technology, one should understand how circuits are implemented at the transistor level. Understanding the logic at the transistor level allows one to relate transistor properties to circuit parameters. Important circuit parameters include I/O voltage switching levels, I/O current requirements, I/O delays and rise/fall times, and power requirements. In this laboratory exercise, the student will construct and simulate two CMOS circuits using the four (4) terminal enhancement-mode PMOS and NMOS transistors (MOS_N_4T and MOS_P_4T) from the Multisim TRANSISTORS_VIRTUAL family. Notice that you can change the length and width of these MOS transistors, thus changing the transconductance parameter.