Constant current source having band-gap reference voltage source

Details Constant current source having band-gap reference voltage source Constant current source having band-gap reference voltage source

1994-12-20

1996-03-05

Nguyen, Matthew V.

Electricity: power supply or regulation systems

Self-regulating

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

323313, G05F 304, G05F 316

Patent

active

054970733

ABSTRACT:
A constant current source that has a band-gap reference voltage source with three transistors, where the third transistor is connected with the input of a current balancing circuit whose output controls current sources for the first and second transistors of the band-gap reference voltage source as well as a current source for generating a constant output current and which can be connected via a resistor both with the operating voltage source and with the reference potential by the use of a switch. This circuit results in a low power consumption because it is switched on by the use of a switch only when required and in the switched-off state draws a minimum amount of leakage current.

REFERENCES:
patent: 4644257 (1987-02-01), Bohme et al.
patent: 4733161 (1988-03-01), Kuwahara
patent: 4785231 (1988-11-01), Bohme et al.
patent: 5180967 (1993-01-01), Yamazaki
patent: 5293112 (1994-03-01), Takahashi
patent: 5391979 (1995-02-01), Kajimoto et al.
patent: 5430361 (1995-07-01), Whitlock et al.

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