High voltage tolerant bias circuit with low voltage transistors

Details High voltage tolerant bias circuit with low voltage transistors High voltage tolerant bias circuit with low voltage transistors

2007-01-16

2010-11-09

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C323S316000

Reexamination Certificate

active

07830200

ABSTRACT:
A circuit (200) can include a bias protection circuit (204) and a reference circuit (202). A bias protection circuit (204) can generate an internal power supply voltage (Vsuppi) from a higher device power supply (Vcch) with low voltage transistors and no resistors. A lower internal power supply voltage (Vsuppi) can be provided by buffer transistors (M5and M6) that are biased according to limit section (206) that generates a bias voltage (biasn2) based on a threshold voltage drop and a feedback bias voltage (biasn1) from reference circuit (202).

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