Compensation of resistance drift

Details Compensation of resistance drift Compensation of resistance drift

2007-06-22

2008-11-04

Nguyen, Linh V (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S144000, C341S118000, C341S120000

Reexamination Certificate

active

07446689

ABSTRACT:
A system, apparatus and method for providing a digital variable resistor with high resolution and efficient use of substrate area is described. In one embodiment of the invention, a digital variable resistor string comprises a serial array of resistors that is connected to a parallel array of resistors through a switching network. A compensation network is coupled in parallel to the parallel array of resistors in order to compensate for resistance drift caused by non-linear responses of components within the variable resistor. For example, the compensation network may interpolate the digital variable resistor to a preferred resistance value that is within an error margin tolerance.

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