System and method for high accuracy calibration of a sensor for

Details System and method for high accuracy calibration of a sensor for System and method for high accuracy calibration of a sensor for

1996-07-01

1999-05-11

Williams, Hezron E.

Measuring and testing

Instrument proving or calibrating

Span or set point adjustment

73 161, 73 162, 73 159, 324601, G01L27/00

Patent

active

059029250

ABSTRACT:
A digital compensation circuit for calibrating a sensor is described. The compensator circuit includes a serial communication circuit for receiving data relating to a plurality of parameters and a compensation circuit coupled to serial communication circuit for providing piece-wise linear compensation of a temperature coefficient (TC). In one embodiment, the compensation circuit further includes a detector for detecting a threshold for a digital temperature and providing an output and a plurality of registers coupled to the detector and the serial communication circuit, a first plurality of registers for providing a first value if the digital temperature is above the threshold, a second of the plurality of registers for providing a second value if the digital temperature is below the threshold. The compensation circuit further includes a selector coupled to the detector and the plurality of registers for selecting one of the first and second of the plurality of registers dependent upon the output of the detector for providing piece-wise linear compensation of a temperature coefficient.

REFERENCES:
patent: 4355537 (1982-10-01), vander Have
patent: 4437164 (1984-03-01), Branch, III
patent: 4933535 (1990-06-01), Zabinski
patent: 5027015 (1991-06-01), Czarnocki

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