A new description of CMOS circuits at switch-level

After analyzing the limitations of the traditional description of CMOS circuits at the gate level, this paper introduces the notions of switching and signal variables for describing the switching states of MOS transistors and signals in CMOS circuits, respectively. Two connection operations for describing the interaction between MOS transistors and signals and a new description for CMOS circuits at the switch level are presented. This new description can be used to express the functional relationship between inputs and the output at the switch level. It can also be used to describe the circuit structure composed of various transistor switches. Based on the new description, the design of CMOS circuits at switch level can be efficiently realized. It is expected that this will provide a basis for techniques for analyzing and optimizing delay and power dissipation of CMOS circuits. I. TRADITIONAL DESCRIPTION OF CMOS CIRCUITS