| 摘要 |
PURPOSE:To simplify the wirings of a board and also to prevent abnormal oscillation by designing circuits from a sawtooth wave generating circuit up to an output stage into one vertical deflection output integrated circuit so as to use only one connection between two integrated circuits. CONSTITUTION:A vertical trigger pulse from the 1st integrated circuit 24 is inputted to a sawtooth wave generating circuit 2 via pins 22, 23 and a sawtooth wave voltage synchronizing it is generated. After the sawtooth wave voltage is amplified by amplifier circuits 21, 5, the voltage is outputted to a deflection coil 6. Then an AC sawtooth wave voltage obtained via a capacitor 7 is added with a DC sawtooth wave voltage at an adder circuit 9 and the result is fed to the amplifier circuit 21, then a stable deflection current is obtained. The sawtooth wave generating circuit 2, the amplifier circuit 21 and the power amplifiercircuit 5 are contained in the 2nd integrated circuit for vertical deflection output, the number of pins is not increased and abnormal oscillation due to interference is also prevented. |
