Power supply circuit

Details Power supply circuit Power supply circuit

2005-05-17

2005-05-17

Laxton, Gary L. (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S280000, C323S281000

Reexamination Certificate

active

06894469

ABSTRACT:
The power supply circuit of this invention includes a constant voltage element which generates an output voltage insensitive to change in ambient temperature, a power supply transistor, to a base of which the output voltage of the constant voltage element is applied and from an emitter of which a power supply voltage is provided, a load connected to an emitter of the power supply transistor and a differential amplifier to one input terminal of which an emitter voltage of the power supply transistor is applied and to the other input terminal of which a voltage corresponding to the output voltage of the constant voltage element is applied, and a voltage corresponding to an output voltage of which is applied to the base of the power supply transistor.

REFERENCES:
patent: 5625278 (1997-04-01), Thiel et al.
patent: 5828204 (1998-10-01), Jansen

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