Method and apparatus for adjusting a reference

Details Method and apparatus for adjusting a reference Method and apparatus for adjusting a reference

2008-07-08

2008-07-08

Laxton, Gary L (Department: 2838)

Electricity: power supply or regulation systems

Self-regulating

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

C323S314000

Reexamination Certificate

active

07397231

ABSTRACT:
Examples of a method and apparatus for adjusting a reference. One circuit includes a current divider to divide a current from a current source into a first current and a reference current. The circuit also includes a current mirror coupled to the current divider to receive the first current from the current divider and to receive an adjustment current. The adjustment current is to set the reference current such that the reference current is adjustable between a full value and a fraction of the full value in response to the adjustment current. A change in the reference current and a change in the adjustment current are proportional when the adjustment current is between an upper and a lower threshold value.

REFERENCES:
patent: 5187387 (1993-02-01), Kawauchi
patent: 5675243 (1997-10-01), Kamata
patent: 7129683 (2006-10-01), Haider et al.
patent: 4119917 (1992-01-01), None
European Search Report, EP Application No. 07252901.9, Oct. 8, 2007.

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