Constant-current circuit

Details Constant-current circuit Constant-current circuit

1994-09-14

1995-10-03

Kincaid, Kristine L.

Electricity: power supply or regulation systems

Self-regulating

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

323907, G05F 328

Patent

active

054555043

ABSTRACT:
A constant-current circuit is disclosed which is arranged such that the magnitude and temperature characteristic of a current flowing through a load can be set independently. Output side of a temperature characteristic setting circuit (15A) connected to a band-gap reference circuit (14), and output side of voltage-follower circuit (16) are connected to a control resistor (R12). The temperature characteristic of the current I0 flowing through the load (13) is set by the band-gap reference circuit (14) and temperature characteristic setting circuit (15A), and the magnitude of the current I0 is set by the control resistor (R12). The arrangement is made such that the magnitude and temperature characteristic of the current I0 can be set independently; thus, the circuit design can be simplified and the the magnitude and temperature characteristic of the current can be set with a high accuracy.

REFERENCES:
patent: 4477737 (1984-10-01), Ulmer et al.
patent: 4651083 (1987-03-01), Lachmann et al.
patent: 4665356 (1987-05-01), Pease
patent: 4853610 (1989-08-01), Schade, Jr.
patent: 4887181 (1989-12-01), Lenz
patent: 4985820 (1991-01-01), Vorel
patent: 5223743 (1993-06-01), Nakagawara
patent: 5241261 (1993-08-01), Edwards et al.

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