Brief description of the synchronous demodulation and recording medium for this, demodulator synchronous and sensor incorporating this demodulator

摘要

The method involves delivering a sample at each instant with the help of a synchronization signal. Products of two samples are calculated from the sample delivered at same instant, where one of the samples is proportional to result of multiplication of a signal value at an instant by a value of an impulse response of a finite impulse response filter. One of the products is added with another produce from the calculated products during observation period, resulting from an addition corresponding to a value estimated from a derivative. Independent claims are also included for the following: (1) an information recording medium comprising instructions to perform a synchronous demodulation method (2) a synchronous demodulator comprising a sample generator (3) a magnetic field sensor comprising a synchronous demodulator.