Switched Capacitor Based Low Pass Filter

Abstract

Demand for Low Power, low voltage integrated circuits has rapidly grown due to the increasing importance
of portable equipment in all market including telecommunication, computers and consumer electronics with smaller size.
The low voltage need for ICs is also motivated by the new dip submicron CMOS technology scaling that required all
transistors of smaller size. In recent years, a lot of researches were done on designing switched capacitor filters for low
supply voltage. The primary reason is that SC filters achieve high filter accuracy with low distortion.SC filters that can
operate with a single 1-V supply in standard CMOS Process have been designed using the switched Op - Amp technique
without any clock voltage multiplier or low threshold voltage. Further, the implementation of passive elements like
resistors, inductors, etc. on layout by implementing switch capacitor network. Recent advances in monolithic switched
capacitor filters have significant impact on voice band communication systems where they found wide acceptance
because of their low cost and high precision.