Voltage regulator

Details Voltage regulator Voltage regulator

1986-10-06

1987-07-28

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

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

323907, 307310, G05F 316

Patent

active

046834168

ABSTRACT:
A voltage supply circuit for supplying a regulated output voltage the magnitude and temperature coefficient of which can be independently controlled. A pair of transistors and associated circuitry develop a voltage proportional to the .DELTA.V.sub.BE of the two transistors which are operated at different current densities and sets a first current through the collector of a third transistor which is proportional to .DELTA.V.sub.BE having a positive temperature coefficient (TC). A second current proportional to the negative temperature coefficient base-to-emitter voltage of the third transistor is generated and combined with the first current to produce a third current having a net negative, zero or positive TC. The third current is used to develop a voltage which is combined with the base-to-emitter voltage of the third transistor to produce the output voltage.

REFERENCES:
patent: 4350904 (1982-09-01), Cordell
patent: 4398160 (1983-08-01), Neidorff
patent: 4525682 (1985-06-01), Lai et al.
patent: 4607174 (1986-08-01), Shoji et al.

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