Self-biasing, offset-nulling power supply monitor circuit

Details Self-biasing, offset-nulling power supply monitor circuit Self-biasing, offset-nulling power supply monitor circuit

1997-06-27

1999-10-26

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327540, 330259, G05L 110

Patent

active

059735473

ABSTRACT:
An active digital voltage regulator circuit is a two terminal device that is connected in shunt to first and second power supply input lines. The active digital voltage regulator circuit stores energy during times when the local power supply voltage is greater than a predefined voltage, e.g., during times when the parasitic inductances supplement the local power supply voltage. The active digital voltage regulator circuit uses the stored energy to supplement the local power supply voltage during times when the local power supply voltage starts to collapse, e.g., during periods when inductive losses are preventing the power supply from maintaining the local power supply voltage. Consequently, digital active voltage regulator circuit smooths the local power supply voltage by greatly ameliorating the ripple voltages associated with parasitic inductances and resistances. A control circuit within the regulator circuit is a combination of two self-biasing and off-set nulling power supply monitor circuits. Each power supply monitor circuit further includes a differencing, non-overlapped, dual-output amplifier connected to the first and second power supply input lines. The differencing, non-overlapped, dual-output amplifier includes a predriver stage and an output stage, both of which are connected to the first and second power supply input lines. The structures and methods are useful on a power supply board to attenuate periodic ripple voltages produced by a DC-DC converter. In general, the structures and methods are applicable in any application with a period ripple voltage.

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patent: 5805019 (1998-09-01), Shin
patent: 5821807 (1998-10-01), Brooks

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