Regulator with improved load regulation

Details Regulator with improved load regulation Regulator with improved load regulation

2011-02-22

2011-02-22

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S275000

Reexamination Certificate

active

07893671

ABSTRACT:
A regulator to provide an output voltage of a constant level at an output node. In an embodiment, the regulator contains a pass transistor to provide a conductive path between a pair of terminals, with the resistance offered by the path being determined by a control voltage on a third terminal of the pass transistor and the conductive path coupling a first reference potential (e.g., power supply) to the output node. An amplifier generates the control voltage based on a difference of a reference voltage and a voltage proportionate to the output voltage. A control unit turns on a current source when the voltage at the output node is below the desired constant level and turns on a current sink when voltage at said output node is above the constant level, to quickly correct for any variations in the output voltage due to load changes.

REFERENCES:
patent: 5471169 (1995-11-01), Dendinger
patent: 5770968 (1998-06-01), Cameron
patent: 5892376 (1999-04-01), Tabatabai et al.
Slew Rate Enhancement Technique for CMOS Output Buffers, Sep. 14, 1989, pp. No. 1304 to 1305, vol. 25, No. 19.

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