Voltage selective circuit of power source

Details Voltage selective circuit of power source Voltage selective circuit of power source

2007-10-30

2007-10-30

Tran, Anh Q. (Department: 2819)

Electronic digital logic circuitry

Interface

Supply voltage level shifting

C326S068000, C326S080000

Reexamination Certificate

active

11202894

ABSTRACT:
A voltage selective circuit of a power source having a first voltage and a second voltage of the present invention includes a selective switch module, a high voltage bias module, a level shift module and a high voltage selective module. The selective switch module includes two first transistors. A power supply is selected from either the first voltage or the second voltage to output to integrated circuits. The high voltage bias module selects a higher voltage from the power supply and the power source of the first/second voltage to output to wells of the two first transistors. The level shift module includes two level shifters. The high voltage selective module selects a higher voltage from the first voltage and the second voltage as internal power to supply to the level shift module.

REFERENCES:
patent: 6774704 (2004-08-01), Kushnarenko
patent: 2004/0070441 (2004-04-01), Bringivijayaraghavan

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