Reference source for producing a current which is independent of

Details Reference source for producing a current which is independent of Reference source for producing a current which is independent of

1976-11-18

1978-06-06

Goldberg, Gerald

Electricity: power supply or regulation systems

Remote sensing

307297, 323 19, 323 22Z, G05F 158

Patent

active

040939073

ABSTRACT:
A reference source for producing a current independent of temperature comprises a constant current source which feeds two parallel connected current branches each including a Zener diode of a different Zener voltage, one or more diodes driven in the forward direction in the branches, a transistor forming part of a current mirror circuit and having an output voltage across its collector-emitter path substantially determined by the difference in the Zener voltages, and a transistor circuit to which the output voltage of the above transistor is fed. The transistors of the transistor circuit and the diodes are selected so as to render the output current of the reference source independent of temperature with the assistance of the current mirror circuit.

REFERENCES:
patent: 3428897 (1969-02-01), Rew et al.
patent: 3648153 (1972-03-01), Graf
patent: 3908162 (1975-09-01), Marley et al.
patent: 3916508 (1975-11-01), Conzelmann et al.
patent: 3956661 (1976-05-01), Sakamoto et al.
patent: 4008418 (1977-02-01), Murphy
patent: 4030023 (1977-06-01), Keith
"A New Dimension to Monolithic Voltage regulators" by Chu and Oswald; IEEE Trans. Broadcast & Tele. Receivers vol. B7R-18, No. 2 May 1972 pp. 73-76.
"On-Chip Heater Helps to Stabilize Monolithic Zener" by Dobkin Electronics Sep. 16, 1976, pp. 106-112.

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