Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2004-12-03
2010-02-16
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
C327S408000, C327S534000
Reexamination Certificate
active
07663426
ABSTRACT:
A power up biasing circuit for a split power supply based circuit includes a split power supply state sensing circuit that produces a pair of complimentary control signals indicating a presence or absence of a suitable biasing power supply voltage. A pseudo power supply voltage, based on a first power supply is selected by a selector circuit for acting as a biasing voltage for one or a plurality of components to be protected during initial power up where there is an absence of a second power supply voltage, based on the pair of complimentary control signals. Once the second power supply voltage has fully ramped up to steady state, the selector circuit selects the second power supply voltage as the biasing voltage for one or a plurality of component to be protected.
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Fong Richard W.
Senthinathan Ramesh
ATI Technologies ULC
Tra Quan
Vedder Price P.C.
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