Bidirectional thermal trimming of electrical resistance

Details Bidirectional thermal trimming of electrical resistance Bidirectional thermal trimming of electrical resistance

2005-09-20

2010-02-23

Evans, Geoffrey S (Department: 3742)

Electric heating

Metal heating

Cutting or disintegrating

C029S610100, C029S612000, C338S195000

Reexamination Certificate

active

07667156

ABSTRACT:
There are described various methods and circuits for trimming the parameter value of a thermally mutable electrical component in two directions. A sequence of heat pulses is selected as a function of thermal history using an adaptive trimming algorithm, where parameters of the sequence of heat pulses are based on a resulting impact of previous heating pulses. Direction of trimming, trimming increment, and remaining trimming distance can all be used to determine the parameters of succeeding heat pulses, wherein the parameters of the pulses can be, for example, amplitude, duration, and time interval between pulses.

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