Super harmonic filter and method of filtering frequency components from a signal
US7558351B2 · kind B2 · utility
1Cited by
19References
8Claims
0Family size
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Inventor
Key dates
| Filing date | Nov 11, 2004 |
| Grant date | Jul 7, 2009 |
| Priority date | — |
| Expiry date | Jun 19, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2007/0192
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A harmonic filter for filtering a plurality of frequency components from an input signal comprises a phase shifter for generating an in-phase signal and a quadrature-phase signal according to the input signal; and a plurality of polyphase filter networks coupled in series. The first polyphase filter network in the series is coupled to the phase shifter for receiving the in-phase and quadrature-phase signals. Each polyphase filter network is for filtering a corresponding one of the frequency components from the input signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.