Regulated current source circuits

Details Regulated current source circuits Regulated current source circuits

1979-04-06

1981-04-07

Shoop, William M.

Electricity: power supply or regulation systems

Self-regulating

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

307297, 330288, G05F 156

Patent

active

042609453

ABSTRACT:
Regulated current sources of a type comprising first and second transistors of complementary conductivity types having respective input and output electrodes, the output electrode of each direct coupled to the input electrode of the other to complete a regenerative feedback loop tending to increase conduction in both transistors. The increased conduction of the second transistor is sensed by the input circuit of an amplifier exhibiting increasing gain for increased signal sensed by its input circuit. The output circuit of this amplifier is connected to the input electrode of the second transistor to complete a degenerative feedback loop which counteracts the regenerative feedback loop at prescribed current levels to establish the level of current regulation.

REFERENCES:
patent: 3629692 (1971-12-01), Goyer
patent: 3754181 (1973-08-01), Kreitz et al.
patent: 3925718 (1975-12-01), Wittlinger
patent: 3952257 (1976-04-01), Schade, Jr.
patent: 4032839 (1977-06-01), Ahmed
R. J. Widlar, "Low Voltage Techniques", IEEE Journal of Solid-State Circuits, vol. SC-13, No. 6, Dec. 1978, pp. 838-846.

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