Multiple-feedback path filter
US4382233A · kind A · utility
3Cited by
1References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 12, 1980 |
| Grant date | May 3, 1983 |
| Priority date | — |
| Expiry date | Nov 12, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H11/1291
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A multiple-feedback path bandpass/bandreject filter which exhibits a nearly constant Q over a predetermined frequency range, and which is tunable by means of a single variable impedance element is provided. A Thevenin equivalent voltage source is placed in series with the tuning element, wherein the Thevenin voltage is a predetermined constant fractional amplitude of the bandreject output voltage, or its equivalent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.