Abstract: A killer signal generator for use in a color television receiver having an information processing circuit for processing specific information such as VIR information contained in a line during the vertical blanking interval. The killer signal generator comprises a line pulse sampling circuit for generating pulses synchronized with the line in which the specific information is contained, a D.C. restorer for restoring D.C. component of a series of video information, which includes a differential pair composed of first and second transistors, the first transistor having a base receiving the video information including the specific information while the second transistor has a base connected to a constant reference potential and an input end adapted to receive the video information through a capacitor, and for generating D.C.

Abstract: The present disclosure relates to a phase shifting circuit for shifting the phase of an alternating circuit, which comprises a series-connected circuit of a resistor, and a capacitor for passing the alternating signal therethrough, a pair of differential amplification circuits each connected with the resistor and the capacitor, and a transistor for combining two alternating signals obtained from the pair of differential amplification circuits each controlled by a constant current source, whereby the combined alternating signal obtained from the transistor is shifted for some degrees.