Level shifter

Details Level shifter Level shifter

2008-12-30

2010-11-16

Auduong, Gene N. (Department: 2827)

Static information storage and retrieval

Read/write circuit

Including reference or bias voltage generator

C365S189110

Reexamination Certificate

active

07835200

ABSTRACT:
A level shifter circuit includes first and second supply inputs for receiving a first supply voltage and a second supply voltage, respectively. The level shifter circuit further comprises a shifting circuit configured to receive an input voltage and output a selected one of the first supply voltage and the second supply voltage according to the value of the input voltage. The shifting circuit includes a circuit branch connected between the first supply input and the second supply input. The circuit branch includes a plurality of series-connected electronic devices and a voltage dropper device connected in series with the plurality of electronic devices for introducing a voltage drop. The level shifter circuit includes a bias generator configured to generate a bias voltage for the voltage dropper device according to values of the first supply voltage and the second supply voltage, said voltage drop depending on the bias voltage.

REFERENCES:
patent: 5166758 (1992-11-01), Ovshinsky et al.
patent: 6181606 (2001-01-01), Choi et al.
patent: 6587375 (2003-07-01), Chung et al.
patent: 7280414 (2007-10-01), Kato

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