Tuning circuitry and method for active filters
US8836416B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2013 |
| Grant date | Sep 16, 2014 |
| Priority date | — |
| Expiry date | Jan 31, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/249
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Embodiments of the present invention may include a filter with programmable components, a tuning signal generator, a comparator, and a feedback system. The tuning signal generator may input first and second test signals into the filter and the comparator may sample the output of the filter in response to each respective signal. The comparator may then compare the sampled outputs to predetermined values. In response to the comparator's output, the feedback system may vary the programmable components of the filter until the search of the programmable components is exhausted, yielding first and second tuning results. Finally, the feedback system may determine a final tuning result based on the first and second tuning results. Consequently, the filter's actual corner frequency may be within an acceptable range of a desired corner frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.