Electricity: power supply or regulation systems – Self-regulating – Using a three or more terminal semiconductive device as the...
Patent
1994-02-08
1995-07-11
Dougherty, Thomas M.
Electricity: power supply or regulation systems
Self-regulating
Using a three or more terminal semiconductive device as the...
330288, G05F 316
Patent
active
054324335
ABSTRACT:
A current source including a first transistor and a second transistor with their bases connected together, a resistor connected to the emitter of the first transistor, a third transistor with its base connected to the collector of the second transistor, and an amplifying unit. The amplifying unit has its input end connected to the collector of the third transistor and is further provided with a plurality of output portions with output resistors. The plurality of output portions of the amplifying unit are connected to the collectors of the first transistor, second transistor and third transistor, respectively. The base current of the third transistor is set to make the collector currents of the first transistor and second transistor substantially equal.
REFERENCES:
patent: 4292597 (1981-09-01), Niimura et al.
patent: 4612496 (1986-09-01), Hines
patent: 5179357 (1993-01-01), Perraud
patent: 5293112 (1994-03-01), Takahashi
patent: 5323124 (1994-06-01), Ikeda
Dougherty Thomas M.
Matsushita Electric - Industrial Co., Ltd.
Nguyen Matthew V.
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