Dual path linear voltage regulator

Details Dual path linear voltage regulator Dual path linear voltage regulator

2008-07-22

2008-07-22

Laxton, Gary L (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S270000, C323S274000

Reexamination Certificate

active

11516214

ABSTRACT:
A voltage regulator comprising two feedback loops for regulating a load voltage, where the first feedback loop comprises a pass transistor to source current to the load, and the second feedback loop comprises a shunt transistor to shunt current from the pass transistor to ground. The use of two feedback loops allows the design of a voltage regulator in which it small-signal impedance, as seen by a power rail, has a phase not less than −90 degrees. This mitigates interactions between the power rail and the voltage regulator that may lead to oscillations, without the need for a relatively large de-coupling capacitor. Other embodiments are described and claimed.

REFERENCES:
patent: 5552697 (1996-09-01), Chan
patent: 5608312 (1997-03-01), Wallace
patent: 7126317 (2006-10-01), Schreck

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