Patent ID: 7317409
Filing Date: 2008-01-08
Classification: A61B,G01R,G16H

Abstract:
1. A circuit adapted for use with a digital pressure sensing apparatus and a monitoring device, and further adapted to generate an emulation of the output of an analog pressure sensing apparatus compatible with said monitoring device, said emulation being based at least on (i) digital inputs received from said digital sensing apparatus and (ii) an excitation signal produced by said monitoring device, the circuit comprising: a digital-to-analog converter (DAC) configured to receive digital inputs generated by said digital sensing apparatus, said DAC adapted to produce an analog output signal using at least said digital inputs; and at least one amplifier operatively coupled to the output of said DAC; wherein said at least one amplifier is configured to produce an output voltage which is substantially ratio-metric with said excitation voltage; and wherein said circuit is adapted to generate said emulation by using said excitation signal as a reference input to said DAC.