Waveform signal processor with selective sampling
US5545988A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 13, 1994 |
| Grant date | Aug 13, 1996 |
| Priority date | — |
| Expiry date | Sep 13, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/22
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To perform digital processing of cyclical waveform signals that include random noise with high accuracy and high reliability without being practically affected by the noise. This is a waveform signal processor into which cyclical waveform signals are input and which outputs corresponding signals. It samples a cyclical waveform signal a plurality of times and then, based upon the obtained sampling values, it performs a Fourier Transform for all the various cycles. Next, the phase angle of a pre-selected frequency component in the Fourier series is determined based upon the Fourier Transform. Then a sampling point at the same phase for all cycles is specified by using the phase angle as a reference. The average of the sampling values at the same phase is calculated and output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.