Voltage regulator and method for providing a regulated output

Details Voltage regulator and method for providing a regulated output Voltage regulator and method for providing a regulated output

2007-09-12

2008-09-09

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

Self-regulating

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

C327S542000

Reexamination Certificate

active

07423416

ABSTRACT:
A voltage regulator includes first and second MOS transistors and a bipolar transistor. The first MOS transistor has a first conductivity type and has a drain coupled to a first power supply voltage terminal, a gate for receiving a first bias voltage, and a source. The second MOS transistor has a second conductivity type and has a source coupled to the first power supply voltage terminal, a drain coupled to the source of the first MOS transistor, and a gate for receiving a second bias voltage. The bipolar transistor has a collector coupled to the source of the first MOS transistor, a base for receiving a third bias voltage, and an emitter for providing an output voltage. The first MOS transistor and the second MOS transistor control a voltage level at the collector of the bipolar transistor in response to a varying power supply voltage provided to the first power supply voltage terminal.

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patent: 5339020 (1994-08-01), Siligoni et al.
patent: 5444358 (1995-08-01), Delepaut
patent: 6157180 (2000-12-01), Kuo

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