| 摘要 |
This circuit for controlling a voltage step-up circuit (2) comprises: - a first PNP transistor (4) of which the emitter (E1) is connected to an input voltage (Vin); - a second NPN transistor (6) of which the collector (C2) is connected to the collector (C1) of the first transistor (4), the emitter (E2) of the second transistor (6) being connected to a ground, and characterized in that the emitter (E2) of said second transistor (6) is connected to the ground via a first resistor (12) and its base (B2) is connected to the ground through at least one diode (14, 16, 18). |
