The influence of the order n of a semi-Gaussian CR-(RC)(n) shaper on t
he signal-to-noise, ratio of a read-out system, subject to detector 1/
f and 1/f(2) noise, is presented by the author. Normalised equivalent
noise charges, ENC(n), as a function of n, for the 1/f and 1/f(2) nois
e, respectively, are calculated and presented. An alternative solution
to circumvent the problem of the singularity in the Beta function is
discussed, which is related to the 1/f noise. Conclusions and some gui
delines are derived from the obtained data.