| 摘要 |
PURPOSE:To prevent the disturbance of synchronism, even if an electromagnetic wave having a weak electric field strength is received, by applying a part of a vertical deflection output voltage to an input of a synchronization separating circuit via a capacitor. CONSTITUTION:A video signal is applied to a terminal 1 and given to a terminal 16 of an integrated circuit 4 through a series circuit comprising a resistor 2 and a capacitor 3. The video signal is applied to an input terminal of a synchronizing separation circuit 5, where the synchronizing signal is separated and outputted to a terminal 14. This synchronizing signal is applied to a vertical oscillation circuit 6 via a terminal 12 and the circuit 6 starts oscillation in synchronizing with this signal. This vertical oscillation output signal is amplified at an amplifier 7, outputted from a terminal 8 and applied to a base of a transistor (TR)8. The output is applied to TRs 9, 10 and the output is given to a vertical deflection coil 12 via a coupling capacitor 11. A connecting point between the coil 12 and the capacitor 11, and the terminal 16 are coupled with a capacitor. |
