Electrical apparatus and method for providing a reference signal

Details Electrical apparatus and method for providing a reference signal Electrical apparatus and method for providing a reference signal

1996-02-29

1997-04-15

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

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

323313, G05F 316, G05F 320

Patent

active

056213085

ABSTRACT:
A band-gap voltage reference (39) has a regulator portion (70) providing a substantially constant current of predetermined magnitude Ic and a band-gap reference portion (72) receiving Ic. The reference portion (72) has a first branch including a first transistor (52) of a first type serially coupled to a second transistor (55) of a second type, a second branch including a third transistor (53) of the first type serially coupled to a fourth transistor (56) of the second type, the first and second branches forming a current mirror (73) carrying a total current of about Ic/2, and a third branch (57) in parallel with the first and second branches and carrying a current of substantially Ic-Ic/2. Base current (65) in the first two branches is compensated by base current (64) of the third branch.

REFERENCES:
patent: 5446368 (1995-08-01), Uscategui
patent: 5479092 (1995-12-01), Pigott et al.
patent: 5512816 (1996-04-01), Lambert
patent: 5530340 (1996-06-01), Hayakawa et al.

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