Patent ID: 8884652
Filing Date: 2014-11-11
Classification: H03K

Abstract:
1. A driving circuit for driving a high-voltage device, comprising: a zener diode whose cathode is connected to a high-voltage power supply voltage and whose anode is connected to a ground potential of a low-voltage domain through a resistor; a high-voltage PMOS transistor whose gate is connected to an anode of the resistor, whose drain is connected to the ground potential of the low-voltage domain, and whose source is operable to supply a ground potential of a high-voltage domain; a level translator whose working voltage terminal is connected to the high-voltage power supply voltage, whose first grounded terminal is connected to the ground potential of the low-voltage domain, and whose second grounded terminal is connected to the ground potential of the high-voltage domain, the level translator being operable to convert a first signal in the low-voltage domain as received to a second signal in the high-voltage domain and output the second signal; and a low-voltage driving circuit connected between the high-voltage power supply voltage and the ground potential of the high-voltage domain, and being operable to receive the second signal and adapt the second signal as a third signal which can drive the high-voltage device.