| 摘要 |
PURPOSE:To improve the output dielectric strength at the time of an output voltage H by constituting a diode between the base and emitter, and base and collector of a transistor (TR) which constitutes the rear stage of a Darlington circuit and generates the output voltage. CONSTITUTION:A schottky barrier diode (SBD)17 is connected through a resistance 16 between the base and emitter of the TR4 which constituted the rear stage of the Darlington circuit together with a TR3 and connected at its emitter to an output terminal 1, and an SBD18 is connected between the base and collector. When the output voltage at the terminal 1 is at H, the base charge of the TR4 is discharged through the SBD17 and a TR2, so the current consumption is rediced. Further, the TR4 operates a Shottky clamping TR because of the SBD18, so the output dielectric strength at the time of the output voltage H is improved. |
