Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1992-06-26
1995-02-28
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327546, 327170, G05F 316
Patent
active
053940288
ABSTRACT:
A method and apparatus for transitioning between power supply levels. In one form, the present invention uses a circuit (22) in a data processing system (10) to smoothly and gradually transition a Power Output signal from a first power supply level to a second power supply level during operation. This transition from a first power supply level to a second power supply level must be smooth and gradual so that a circuit, such as oscillator circuit (12), which is receiving its power from Power Output, may continue to function properly during the transition. A Control signal, which can change back and forth between a first logic level and a second logic level, is used to select which power supply level will be provided as the Power Output.
REFERENCES:
patent: 4833341 (1989-05-01), Watanabe et al.
patent: 4849663 (1989-07-01), Kunze et al.
patent: 4947063 (1990-08-01), O'Shaughnessy et al.
patent: 5027002 (1991-06-01), Thorton
patent: 5187396 (1993-02-01), Armstrong, II et al.
patent: 5218239 (1993-06-01), Boomer
patent: 5241226 (1993-08-01), Rossi et al.
Burch Kenneth R.
Feddeler James R.
Callahan Timothy P.
Hill Susan C.
Lam T. T.
Motorola Inc.
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