Voltage controllable current source

Details Voltage controllable current source Voltage controllable current source

1989-04-26

1989-12-05

Salce, Patrick R.

Electricity: power supply or regulation systems

Self-regulating

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

323312, G05F 316

Patent

active

048855251

ABSTRACT:
In the voltage controlled current source disclosed herein, temperature compensation is provided by offsetting base emitter voltage drops in a pair of bipolar transistors of complementary conductivity types. The control voltage is applied through a resistor to the emitter of a first transistor connected in common base mode. The base voltage of the first transistor is obtained from the emitter of a transistor of complementary conductivity type, the base of which is connected to a stable voltage source. The collector current of the first transistor is then applied to a current mirror to obtain an output current which is highly proportional to the control voltage.

REFERENCES:
patent: 4268789 (1981-05-01), Nagano
patent: 4716356 (1987-12-01), Vyne et al.
patent: 4808907 (1989-02-01), Main

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