IIR filter for reducing the complexity of multiplying elements
US8645444B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2008 |
| Grant date | Feb 4, 2014 |
| Priority date | — |
| Expiry date | Jul 2, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/0227
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An infinite impulse response (IIR) filter is provided for receiving an input signal and outputting a filtered signal. The filter comprises feedback circuitry for feeding back said filtered signal, the feedback circuitry comprising a first delay element for delaying said filtered signal; and a sub-unit, for receiving said delayed filtered signal, for outputting a summed signal which is the difference between said delayed filtered signal and a further-delayed filtered signal, and for outputting a multiplied signal which is an inverted further-delayed filtered signal multiplied by a first filter coefficient. At least said input signal, said delayed filtered signal, said multiplied signal, and said summed signal are employed to generate said filtered signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.