| 摘要 |
PURPOSE:To obtain a vertical output circuit for a multiscan monitor capable of supplying deflection currents whose linearity is satisfactory regardless of a using frequency only by supplying a constant voltage to one edge of a vertical deflection coil, thereby setting the constant of a DC negative feedback circuit. CONSTITUTION:The vertical output circuit is constituted of a vertical driving circuit 1 which supplies tooth-shaped currents to a vertical deflection coil 2, DC negative feedback circuit 3 which corrects the linearity of the output signal of the circuit 1, and AC negative feedback circuit 4 with which a capacitor 5 for DC cut is connected, which improves the stability of the circuit 1. Then, a circuit 7 for supplying the constant voltage is connected with the vertical output circuit. The circuit 7 is equipped with complement-connected NPN type and PNP type transistors, and an output from a connecting point 8 is outputted to the deflection coil 2. Also, the complement-connected transistors are equipped with a parallel circuit in which two diodes are serially connected, and the constant voltage from a middle point 9 is applied to the bases of the transistors. |
