ABSTRACT
Filters perform one of the most important functions of present day electronics systems. Their implementations have evolved drastically over the years as a result of the development in technology. Originally, filters had been implemented using passive components, such as resistors, capacitors, and inductors. This chapter provides more insight into the fundamental principles of operation of switched-capacitor (SC) circuits and introduces the basic building blocks that are required for the design of parasitic-insensitive SC filters. It demonstrates the cascade and the coupled-biquad SC filter design strategy. The chapter presents state-space formulations that represent the general nth-order DT transfer function that meets the specifications of the SC filter. In SC filter design, the output of the op amps is limited to within a few volts of the supply voltage. Overdriving these op amps will make them saturate and will result in “clipping” which distorts the signal.
