Dynamic filter
US4011466A · kind A · utility
3Cited by
2References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 10, 1976 |
| Grant date | Mar 8, 1977 |
| Priority date | — |
| Expiry date | May 10, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H11/1217
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A low noise resonant filter of wide dynamic range and low distortion is formed from a number of series-connected filter stages, each comprising a current integrating amplifier driven from transconductance formed from a bipolar differential pair with feedback to one member of the transconductance pair to maintain its transconductance substantially constant. A further bipolar differential pair transconductance at the input stage operates with a widely variable transconductance and provides soft limiting and wide dynamic range, especially when the filter is operated in the resonant mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.