Patent Number: 7,133,487

Title: Level shifter

Abstract: A level shifter has a pair of P-type MOS transistor switches, a pair of N-type MOS transistor switches, an inverter and a plurality of triggers. The triggers are connected to gates of high-voltage devices (N-type MOS transistor switches) and substrates of the high-voltage devices, so that the triggers can produce a trigger signal for a period of time after receiving a low voltage control signal in order to change voltages on the substrates at transition and further reduce threshold voltages of the substrates to increase transition speed of the shifter circuit.

Inventors: Lin; Kun Tsung (Taichung, TW)

Assignee: Sunplus Technology Co., Ltd.

International Classification: H03K 19/0175 (20060101)

Expiration Date: 2019-11-07 0:00:00