PURPOSE: To decrease the effect of 1/f noise generated at a charge transfer delay element by applying signal processing at the input and output sides of the charge transfer delay element.
CONSTITUTION: An input circuit 1 and an output processing circuit 3 are connected respectively to the input and output of a CCD delay circuit 2. When an input signal from a terminal 4 is given, the input processing circuit 1 applies frequency conversion to the input signal toward high frequencies. Thus, the signal band is separated from the low frequency band where the level of 1/f noise is high. After a band with high 1/f noise is eliminated by an output processing circuit 3, the signal is subject to frequency conversion into the original band. Through the processing above, the effect of the 1/f noise generated by a charge transfer delay circuit is decreased.
YUJI HIROFUMI
NAKANO HIROSHI
