Switched-capacitor Amplifier Research Articles

Effects of finite operational amplifier gain-bandwidth product on a switched-capacitor amplifier

The effects of the finite operational amplifier gain-bandwidth product GB on the performance of an inverting switched-capacitor amplifier are presented. Limitations of the GB and the clock frequency fc=1/T as well as GB.T are determined.

M.O.S. switched-capacitor amplifiers

Switched-capacitor voltage gain elements, in which the gain is precisely controlled by the ratio of two capacitors, are presented. The voltage gain is obtained by means of a transconductance element operating into a switched-capacitor resistor. Circuit configurations use a single operational amplifier or a unity-gain buffer. In some of these configurations, the offset voltage of the operational amplifier or the buffer is not amplified.