| 摘要 |
Noise elimination circuit, which eliminates a noise from nobroadcasting channel reception and a voice signal from a closed channel and a noise generated in scattered synchronization, comprises an AFC voltage detector, a reference voltage generator varied by a resistor(R1) and a variable resistor(VR1), a synchronizing circuit(11), first comparator(13) which compares a voltage from AFC voltage and a reference voltage, second comparator(14) which makes a pulse generated by comparing a horizontal synchronizing signal and a pulse from AFC detection signal, and a switching circuit(15) which makes a connection between an audio amplifier and an intermediate freq. discriminanter. |
