Calibration circuit

Details Calibration circuit Calibration circuit

2005-04-26

2005-04-26

Pascal, Robert (Department: 2829)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Analysis of complex waves

C324S1540PB, C324S601000

Reexamination Certificate

active

06885181

ABSTRACT:
An apparatus is provided to calibrate a target electrical circuit. The target electrical circuit includes at least a first variable capacitor and a first resistive element. The apparatus includes a second variable capacitor proportionally matched to the first variable capacitor. The apparatus also includes a measurement branch having at least a second resistive element proportionally matched to the first resistive element, and a current generator to generate a current proportionally matched to a predicted current of the target circuit. The apparatus also includesa digital loop to generate a digital code based on at least a comparison between a first voltage signal of the measurement branch and a predetermined voltage.

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U.S. Appl. No. 09/629092, Pierte Roo, filed Jul. 31, 2000.

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