Voltage regulation for access cards

Details Voltage regulation for access cards Voltage regulation for access cards

1996-02-13

1998-01-27

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

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

323274, G05F 140, G05F 144

Patent

active

057125554

ABSTRACT:
The present invention relates to an apparatus and method for voltage regulation. The apparatus includes an error amplifier circuit in communication with an external reference voltage input. The error amplifier circuit produces an error voltage that is proportional to the difference between an external reference input voltage and an output voltage. A series pass circuit is in communication with the error amplifier circuit and is responsive to the error voltage. The method comprises the steps of comparing an external reference voltage to an output voltage, generating an error voltage proportional to the difference between the external reference voltage and the output voltage, and regulating the output voltage based upon the error voltage.

REFERENCES:
patent: 4006400 (1977-02-01), Fett et al.
patent: 4538102 (1985-08-01), Takagi et al.
patent: 4574232 (1986-03-01), Petty
patent: 4593338 (1986-06-01), Takeda et al.
patent: 4605891 (1986-08-01), Wrathall
patent: 4650981 (1987-03-01), Foletta
patent: 4743833 (1988-05-01), Johnson

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