Level shift circuit

Details Level shift circuit Level shift circuit

2008-09-15

2010-10-12

Lam, Tuan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

C326S068000

Reexamination Certificate

active

07812660

ABSTRACT:
A level shift circuit prevents a through current in an output circuit connected to a high-voltage power supply, thereby reducing power consumption and noise and enabling a high-speed operation. The level shift circuit includes first and second bias generating circuits that supply a gate bias voltage to each of a PMOS transistor as a first transistor and a NMOS transistor as a second transistor. Each of the first and second bias voltage generating circuits includes a series connection of a diode-connected PMOS transistor and a diode-connected NMOS transistor. The discharge of a capacitor to the high-voltage power supply is prevented, and a through current is prevented when an output signal transitions from a high-level to a low-level and vice versa, whereby power consumption and noise can be reduced.

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