Patent ID: 7791225
Filing Date: 2010-09-07
Classification: G02F

Abstract:
1. A power switching circuit comprising: a control signal input terminal configured for receiving a control signal; an output terminal configured to be connected to a load circuit; a first direct current (DC) power supply; a first switching transistor comprising a control electrode connected to the control signal input terminal, a first current conducting electrode connected to the DC power supply via a bias resistor, and a second current conducting electrode configured to be connected to ground; a second switching transistor comprising a control electrode connected to the first current conducting electrode of the first switching transistor, a first current conducting electrode connected to the DC power supply, and a second current conducting electrode connected to the output terminal; a charging resistor connected between the first current conducting electrode of the first switching transistor and the control electrode of the second switching transistor; a charging capacitor connected between the control electrode of the second switching transistor and ground; and a discharging resistor configured to be connected between the output terminal and ground.