ARRANGEMENT FOR SIGNAL DELAY, PARTICULARLY FOR USE IN A VERTICAL APERTURE CORRECTOR FOR TELEVISION

摘要

An arrangement for signal delay suitable for use in a television vertical aperture corrector in which an image signal which is delayed once and twice a line period, but which is further identical is derived from an input image signal. To this end an AM modulated carrier is used whose amplitude is maintained constant by means of a control circuit which is responsive to the black level in the image signal. The control circuit is active as a clamping circuit which feeds a control voltage back to the high-frequency circuit. The temperature-dependent damping in the delay circuits is thus corrected.