chapter  7
36 Pages

- Time Variant Shapers

Double Sampling (CDS) is discussed as a case study. The CDS technique finds in

fact widespread use in integrated front-end electronics, in particular in the readout of

monolithic CMOS sensors.

Understanding the basics of noise calculations in the time domain is crucial for

several reasons. First, it is the most direct tool to quantify the ENC of time variant

networks, at least as far as white series and parallel noise sources are concerned.

Second, it is the technique employed in a number of key papers dealingwith the subject

of noise analysis andminimization in electronics for radiation sensors. Third, the time

domain view provides an alternative and in some cases more intuitive perspective on

the central issue of noise. In the last part of the chapter a few significant examples of

time variant filters implemented in CMOS technologies are discussed.