Current mode trimming apparatus

Details Current mode trimming apparatus Current mode trimming apparatus

2007-09-04

2007-09-04

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S538000, C323S313000

Reexamination Certificate

active

11403002

ABSTRACT:
A current mode trimming apparatus for trimming a desired current is provided. The trimming apparatus includes a first transistor, a first resistor, an operational amplifier, a first controlled current source, and a second controlled current source. The first and second controlled current sources adjust the output current thereof respectively in accordance with the trimming data. The desired current passing through the first transistor is trimmed in a manner of increasing or decreasing current. Therefore, the invention can linearly increase or decrease the desired current by controlling the controlled current sources with the trimming data to achieve the goal of trimming.

REFERENCES:
patent: 4349777 (1982-09-01), Mitamura
patent: 5446407 (1995-08-01), Yamamoto
patent: 5493205 (1996-02-01), Gorecki
patent: 6608472 (2003-08-01), Kutz et al.
patent: 7218168 (2007-05-01), Rahman

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