Time-variant filters. Part II

Abstract Various types of time-variant filters are considered and compared with time-invariant filters. Some conditions to achieve a better signal-to-noise ratio are considered when one uses the gated integrator. It is shown that: 1) at high counting rates the gated integrator is preferable to a peak detector, as far as pileup noise is considered; and 2) at low counting rates the noise whitening filter—double integrator structure is preferable; it can be realized using monolithic technology.