Constant current semiconductor circuit arrangement

Details Constant current semiconductor circuit arrangement Constant current semiconductor circuit arrangement

1977-03-28

1978-08-01

Goldberg, Gerald

Electricity: power supply or regulation systems

Remote sensing

307297, 307304, 323 22R, G05F 308, H02J 104

Patent

active

041045750

ABSTRACT:
A constant current source is provided by a circuit of two metal oxide semiconductor field effect transistors (MOSFET) of the enhancement type having opposite conductivities. One transistor constitutes an input transistor. The other transistor is the output transistor. The drain terminals are connected to the respective polarities of an operating voltage source. The gate terminal of the input transistor is connected to a control voltage source. The source terminals are interconnected and grounded through a resistor. The constant current is available at the drain electrode of the output transistor. If it is desired to produce constant output currents of alternating directions, two such circuits may be interconnected in mirror symmetrical fashion.

REFERENCES:
patent: 3832644 (1974-08-01), Nagata et al.
patent: 4020367 (1977-04-01), Yamashiro et al.
patent: 4031456 (1977-06-01), Shimada et al.
IBM Tech. Disc. Bulletin, vol. 13, No. 9, Feb. 1971; p. 2516, "Constant-Current Source Network" by Baitinger et al.
Electronic Design 12, Jun. 7, 1976, pp. 160-161, "Fets Provide Current Limiting . . . . " by Graveff et al.

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