Voltage reference for transistor constant-current source

Details Voltage reference for transistor constant-current source Voltage reference for transistor constant-current source

1986-07-10

1987-12-22

Salce, Patrick R.

Electricity: power supply or regulation systems

Self-regulating

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

323907, 323315, G05F 320

Patent

active

047148721

ABSTRACT:
A voltage reference circuit (10) for a constant-current source transistor (16) of the bipolar type provides an output voltage in two components. The first voltage component varies in accordance with the negative temperature coefficient (C.sub.1) of the base (58)-emitter (78) junction of a bipolar transistor (60) to compensate for temperature-related changes in the base (18)-to-emitter (22) voltage of the constant current source transistor. The second voltage component is of fixed magnitude and develops collector current (I.sub.0) flow through the transistor and thereby actuates constant-current source operation. The result is a transistor constant-current source that provides a constant output current independent of temperature.

REFERENCES:
patent: 4446419 (1984-05-01), van de Plassche et al.

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