Inventors:
Jackson Szczyrbak - Newport News VA
Karmjit Sidhu - Yorktown VA
Oleg Boyarsky - Cherry Hill NJ
Assignee:
Lucas Industries, Inc. - Reston VA
International Classification:
G01R 1500
G06F 1130
Abstract:
Disclosed is a digital correction system for application to an analog parameter measurement transducer. A temperature sensor, either separate from or incorporated into a parameter measurement transducer provides a temperature signal which is converted by an A-to-D converter to address temperature gain and offset corrections. These corrections are applied to a preamplifier amplifying the output of the transducer. The preamplifier output which has been temperature gain and offset corrected, is applied as an input to a final stage amplifier and also to a further A-to-D converter which addresses a storage device including transducer gain and offset corrections. The transducer gain and offset corrections are applied to the final stage amplifier so that the analog sensor output is corrected for temperature effects and for transducer nonlinearities. Various preferred embodiments can utilize two amplifiers or a single amplifier and can be driven by constant voltage or constant current power supplies for supplying power to the transducer.