Patent ID: 7696646
Filing Date: 2010-04-13
Classification: G09G,H03K

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 direct current (DC) power supply; a first transistor comprising a control electrode connected to the control signal input terminal, a first current conducting electrode, and a second current conducting electrode connected to ground; a second transistor comprising a control electrode connected to the first current conducting electrode of the first transistor via a discharging resistor and a diode and further connected to the DC power supply via a discharging capacitor, a first current conducting electrode connected to the DC power supply, and a second current conducting electrode connected to the output terminal; and a third transistor comprising a control electrode connected to the first current conducting electrode of the first transistor, a first current conducting electrode connected to the output terminal, and a second current conducting electrode connected to ground.