Ideal-like band-pass filter and single-frequency filter
US7868687B2 · kind B2 · utility
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2References
10Claims
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Key dates
| Filing date | Aug 12, 2008 |
| Grant date | Jan 11, 2011 |
| Priority date | — |
| Expiry date | Apr 11, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/0219
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A near ideal single frequency and band pass filter comprises an input unit, a filter combination, and an output unit. The input unit accepts an input signal which can be expressed with a mathematical formula f(t). The filter combination comprises a plurality of filters, wherein each filter can generate a control signal and performs the signal filtering process based on the control signal. The control signal can be expressed with a mathematical formula hde(θ). The filter combination processes the input signal based on a set of a plurality of control signals by means of a formula.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.