GEOMETRIC ERROR COMPENSATION CIRCUIT OF COLOR TELEVISION CAMERA DEVICES

摘要

ABSTRACT OF THE DISCLOSUREFor the purpose of compensating for geometricerrors at four corners of a color picture there areprovided a circuit for separating a vertical scannningsaw tooth shaped signal into first and second signalscorresponding to fore and rear portions of a verticalscanning period, first and second balanced modulatorsrespectively modulating a horizontal scanning sawtooth shaped signal in accordance with the separatedfirst and second signals, circuits for separatingthe outputs of the modulators in accordance withtheir reference levels, and circuits for generatinggeometric error compensation outputs correspondingto specific portions in the horizontal and verticaldirections of the scanned picture.