Avoiding excessive cross-terminal voltages of low voltage...

Details Avoiding excessive cross-terminal voltages of low voltage... Avoiding excessive cross-terminal voltages of low voltage...

2007-02-13

2007-02-13

Tra, Quan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S407000

Reexamination Certificate

active

10711532

ABSTRACT:
Ensuring sufficient bias current is provided to a portion of a circuit containing low voltage transistors operating with a high supply voltage. Such a sufficient bias current may be ensured by generating a primary bias current from a low supply voltage and a backup bias current from a high supply voltage, and providing the backup bias current as the bias current if the primary bias current is not present. The primary bias current may be provided as the bias current when the low supply voltage is available. Thus, the backup bias current is provided as bias current in case of undesirable supply sequencing.

REFERENCES:
patent: 5272393 (1993-12-01), Horiguchi et al.
patent: 5939933 (1999-08-01), Wang
patent: 5982162 (1999-11-01), Yamauchi
patent: 6495977 (2002-12-01), Kumano
patent: 6566935 (2003-05-01), Renous
patent: 6747510 (2004-06-01), Jantzi et al.
patent: 2004/0222840 (2004-11-01), Yates et al.

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