HF-MODULATOR WITH HF-INTERFERENCE INHIBIT CIRCUIT

摘要

The present invention relates to a high frequency modulator applied to a European PAL type video cassette recorder (VCR). In particular, a broadcast channel adjacent to a VCR channel causes interference with an output channel of a high frequency modulator of a VCR. A high frequency modulator having a high frequency interference suppression circuit capable of being suppressed.;The present invention attenuates a received high frequency broadcast channel using attenuation circuits composed of resistors R ₁ and R ₂ , but controls the on / off operation of the attenuation circuit as a high frequency automatic gain control signal fed back to the tuner of the VCR.