Constant current source circuit

Details Constant current source circuit Constant current source circuit

1984-08-31

1986-03-25

Beha, Jr., William H.

Electricity: power supply or regulation systems

Self-regulating

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

323273, 323303, G05F 326

Patent

active

045786330

ABSTRACT:
A circuit produces a stable constant current during power source voltage fluctuations which includes resistance means and first, second, third, fourth, fifth and sixth transistor devices. The first and second transistor devices are of a first conductivity type and are connected to form a first current mirror circuit, the first transistor device being connected as a diode. The third and fourth transistor devices are of a second conductivity type and are connected to each other to form a second current mirror circuit, the third transistor device being connected in series with the second transistor device, and the fourth transistor device being connected as a diode. The fifth transistor device is connected at its collector-emitter path in series with the first transistor device and at its base to the connection point between the second and third transistor devices. The resistance means is connected between the first and fifth transistor devices. The sixth transistor device is connected at its collector-emitter path in series with the fourth transistor device and at its base electrode to the connection point between the fifth transistor device and the resistance means.

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Carsalade et al, "Automatic DC Current Regulator Circuit", IBM Tech. Discl. Bul., vol. 23, No. 7A, pp. 2850, 2851, Dec. '80.
Patent Abstracts of Japan, vol. 7, No. 156 (P-209) [1301], 8th Jul. 1983.
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Electronics; Apr. 28, 1969; pp. 139-141.

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