Transducer assembly with digitally created signals

摘要

Techniques for coupling with devices that convert displacements into differential voltages and improve the sensitivity of such devices. A transducer operates based on changes of inductances between primary and secondary of a transformer to produce a differential signal that includes a noninverted signal and an inverted signal. A switch receives the noninverted signal and the inverted signal. A processor creates a square wave signal for driving the transducer input, and also digitally creates an inverted transducer output. A filter operates to filter the square wave output from the processor to produce a substantially single frequency signal at a specified timing having a specified phase relationship relative to the first phase inversion signal based on instructions that are executed by the processor.

主权项

1. A method of sensing position based on information from a position sensor, comprising:
receiving said information from the position sensor, as the position sensor moves, as an electronically-sensed signal, said electronically-sensed signal being a differential signal that includes a noninverted signal part and an inverted signal part; using a processor for creating an inversion signal for the differential signal, by using said processor to produce a square wave output having a specified phase relationship relative to said differential signal, based on instructions that are executed by the processor; filtering said square wave output to produce a filtered signal at a specified timing as said inversion signal; using said filtered signal as a trigger to cause inversion of the differential signal to produce an output indicative of said position sensor.