Voltage regulator circuit having short-circuit protection...

Details Voltage regulator circuit having short-circuit protection... Voltage regulator circuit having short-circuit protection...

2006-09-05

2006-09-05

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S284000, C361S093100

Reexamination Certificate

active

07102336

ABSTRACT:
A voltage regulator circuit includes a regulator circuit and a short-circuit protection circuit. The regulator circuit includes a first transistor and a first amplifier. The first amplifier outputs a gate voltage to a gate of the first transistor in response to a reference potential and a feedback potential such that the feedback potential coincides with the reference potential. The feedback potential is a fed back potential from the first transistor. The short-circuit protection circuit includes a second transistor, a first resistance, a second resistance and a second amplifier. The gate voltage is supplied to a gate of the second transistor. The first resistance connects a first terminal of the second transistor with a ground. The second resistance connects a second terminal of the second transistor with a power source. The second amplifier outputs a control voltage to the first amplifier in response to a bias potential and a potential of the first terminal to control the gate voltage.

REFERENCES:
patent: 5596465 (1997-01-01), Honda et al.
patent: 6603292 (2003-08-01), Schouten et al.
patent: 2003-173211 (2003-06-01), None

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