| 摘要 |
Noise elimination circuit, which eliminates a noise from nobroadcasting channel reception and a voice signal from closed channel, comprises a horizontal synchronizing circuit, a comparator which makes a pulse by comparing a horizontal synchronizing signal and a reference voltage varied by a variable resistor, and a switching circuit. The switching circuit performs the ON/OFF operation by a pulse from comparator. The pulse is generated by a pulse from the synchronizing circuit and a voltage leveled by a reference voltage generator. |
