A comb type filter and image machine

The present invention relates to a comb type filter in which the luminance signals and color burst signals are separated from composite color image signals and output, and said comb type filter can be installed in image machines, such as color television receiver or VTR. The object of the present invention is achieved by extracting the frequency band component of color burst signal from composite color signals through band-pass filter 101, said extracted color burst signal is delayed with the first delay circuit 102 for a level period. Obtaining the subtraction output of the output signals of band-pass filter and delay circuit 102 using first subtraction circuit and output. Obtaining the addition output of the output signals of band-pass filter 101 and delay circuit 102 using addition circuit 104. Arranging a related detection circuit 115 for relational output 2 signal k0 from the output of first subtraction circuit 103 and the output of the addition circuit 104, and supplying signal k1 to operation member 11