FERNSEHEMPFAENGER

摘要

A television receiver in which an APC circuit 33, a VCO 34 and a frequency divider circuit 35 constitute a PLL circuit, which responds to an output of a synchronous separator circuit 31. In the case where the television receiver receives a signal from a broadcasting station or a playback signal from a video tape recorder in its normal playback mode, horizontal synchronous pulses of 15750 Hz are produced from an output of the frequency divider 35, and vertical synchronous pulses of 60 Hz are produced from an output of a 1/525 counter 36 to which an output of the VCO 34 is applied. A voltage comparator 45 detects an additional pulse (Vp'', Fig. 2) which is supplied from the video tape recorder in its special playback mode e.g. a fast playback mode. In the presence of the additional pulse, the output of the voltage comparator 45 forcibly resets the 1/525 counter 36, with the result that the vertical synchronous pulse responsive to the special playback mode is produced from the output of the 1/525 counter 36.