Analog transducer circuit with digital control

Details Analog transducer circuit with digital control Analog transducer circuit with digital control

G - Physics

08

C

73/69

G08C 19/00 (2006.01) G08C 19/02 (2006.01)

Patent

CA 1300924

ABSTRACT OF THE DISCLOSURE A two wire transmitter controls loop current as a function of a sensed parameter such as pressure or temperature using analog sensing and signal processing circuitry. Corrections, such as for zero, span, and linearity are provided in the form of analog correction signals by a digital circuit which includes a nonvolatile memory , a microcomputer , and a digitial-to-analog (D/A) converter . The microprocessor controls the D/A converter as a function of stored digital correction values to produce the analog correction signals used by the analog signal processing circuitry to control the magnitude of the loop current flowing through the two wire transmitter

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