Digital filter with state storage
US6820103B2 · kind B2 · utility
8Cited by
7References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2001 |
| Grant date | Nov 16, 2004 |
| Priority date | — |
| Expiry date | Aug 22, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/0607
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A system for digital filtering includes a set of logic gates, a state storage, and a multiplexer. The state storage includes two or more storage banks and may also include combinatorial logic and/or at least one lookup table. In one application, a filtering operation according to a finite-impulse-response filter coefficient vector is performed without runtime multiplications. Applications to symmetric and antisymmetric filter coefficient vectors are described, as well as applications to filter coefficient vectors of arbitrary odd or even length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.