As opposed to continuous time capacitor circuits in analog signal processing, Switched Capacitor (SC) circuits find wide range of applications in discrete time signal processing. These circuits function by charging and discharging capacitors with the help of switches to provide flow of charge in desired direction. SC filters are embedded in integrated circuits due to their inherent temperature and voltage characteristics.
A typical SC circuit is equivalent to a discrete time resistance. Consider a simple example of a SC circuit:
Clock pulses are applied on switches to perform transition between two voltage sources shown in the figure. It is made sure that the clock pulses don’t overlap so that the voltage sources are not short circuited. It Continue reading...