Regenerative power-on control circuit

Details Regenerative power-on control circuit Regenerative power-on control circuit

2007-11-13

2007-11-13

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S198000

Reexamination Certificate

active

11196715

ABSTRACT:
A power-on control circuit includes a coupling device coupled to a first voltage supply. A first inverter, coupled between the coupling device and a complementary voltage, has an input node coupled to a second voltage supply with a supply voltage level lower than that of the first voltage supply. A level shifter, coupled between the first voltage supply and the complementary voltage, has a first input node connected to an output node of the first inverter and a second input node coupled to the second voltage supply, for generating the power-on control signal when the first voltage supply is powered up and the second voltage supply is turned off and for disabling the power-on control signal when the second voltage supply is subsequently powered up. The coupling device eliminates a leakage current path from the first voltage supply to the complementary voltage through the first inverter.

REFERENCES:
patent: 6563353 (2003-05-01), Chen
patent: 7019417 (2006-03-01), Kang
patent: 7046067 (2006-05-01), Chung
patent: 2005/0195012 (2005-09-01), Sueoka et al.

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