Apparatus for providing a demodulated synchro output signal.

摘要

A synchro resolver angular position sensor provides the sine and cosine of angular position by applying a square wave excitation from an amplifier 27 to the rotor winding 19 of a resolver 18. The corresponding square wave outputs of the sine and cosine windings of the resolver stator 20 are sampled in time synchronism with the excitation at a predetermined time phase of the square wave excitation cycle. The sampled sine and cosine amplitudes are converted into digital format via an analog-to-digital converter 33, 34, for application to a digital processor. The upper corners of the positively-going leading edges and the lower corners of the negatively-going leading edges of the square wave excitation waveform are rounded to minimise ringing of the sine and cosine square wave outputs from the resolver 18.