Low-pass filtering system having phase-locked loop
US11469763B1 · kind B1 · utility
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3Claims
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Key dates
| Filing date | Dec 21, 2021 |
| Grant date | Oct 11, 2022 |
| Priority date | — |
| Expiry date | Dec 21, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E40/40
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Disclosed is a low-pass filtering system having a phase-lock loop comprising a Park transform circuit, a first low-pass filter, a second low-pass filter, an inverse Park transform circuit, a phase-locked loop filter, and a voltage-controlled oscillator. The Park transform circuit, the first low-pass filter, the second low-pass filter, and the inverse Park transform circuit form a phase detector of a phase-locked loop, since the low-pass filter system of the present invention has the phase-locked loop mechanism, the phase and amplitude of a output signal remain the same with those of the original AC input signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.