CCD output signal processing circuit for use in an image pick-up device

DETAILED DESCRIPTION It is an object of the present invention to provide a CCD output signal generating circuit for generating a CCD output signal in which various kinds of noise components are efficiently eliminated.
This object is accomplished by a CCD output signal generating circuit comprising a CCD type charge transfer device for transferring and outputting signal charges in response to the drive signal of a frequency f.
sub.
c, an output circuit for generating an output signal corresponding to output signal charges from the CCD type charge transfer device, a low-pass filter circuit which is connected to the output circuit and has a cut-off frequency within a range of 2f.
sub.
c to 6f.
sub.
c, and a correlated double sampling circuit connected to the low-pass filter circuit for sampling and holding an output signal from the low-pass filter circuit.
In this invention, by use of the low-pass filter circuit whose cut-off frequency is set to a frequency within a range of 2f.
sub.
c to 6f.
sub.
c, the influence on the operation of the correlated double sampling circuit by the high frequency noises included in the output signal from the output circuit, is suppressed.
Thus, it is from this correlated double sampling circuit that the CCD output signal, which does not include various kinds of noise components and corresponds to the signal charges from the charge transfer device, is derived.