Calibration circuit for resistance component

Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Calibration

Reexamination Certificate

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C326S030000, C702S085000, C702S090000

Reexamination Certificate

active

07741855

ABSTRACT:
A calibration circuit including a plurality of first resistance components, a plurality of second resistance components, and a first feedback system is provided. The first feedback system selects M1first resistance components and N1second resistance components so that a first combination of the M1first resistance components and the N1second resistance components has a first predetermined relationship with the impedance of a first resistor. The first feedback system selects M2first resistance components and N2second resistance components so that a second combination of the M2first resistance components and the N2second resistance components has a second predetermined relationship with the impedance of the first resistor. Based on the values of M1, N1, M2, N2, and a target impedance, the first feedback system generates a first set of calibration signals for a plurality of third resistance components and generates a second set of calibration signals for a plurality of fourth resistance components.

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patent: 2003/0201790 (2003-10-01), Rajan et al.

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