In this paper we present two filters called Reflection Delayed noise
Suppression RDS and Integration Reflection Delayed noise Suppression IRDS which
are useful to increase the dynamics of video CCD cameras. The RDS is a band-pass
filter built with a parallel short-circuited line. It lowers significantly the most
important noise which is called reset noise. Unfortunately, this signal processing
unit increases the contribution of thermal fluctuations by about 3 dB. To overcome
this disadvantage, a triggered low-pass filter can be added to the RDS which leads
to the IRDS cell. First, we will describe both systems, and then we will compare
their effects, in a theoretical way and by experimentation, on the unsampled noises
(i.e. the thermal and flicker noises) generated in the CCD sensor.