Band pass filter
US4453145A · kind A · utility
17Cited by
2References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 21, 1982 |
| Grant date | Jun 5, 1984 |
| Priority date | — |
| Expiry date | Sep 21, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J5/24
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A band-pass filter circuit has series elements, comprising a parallel resonant circuit and a first inductance, and shunt elements comprising a series resonant circuit and a second inductance, the resonant circuits comprising variable capacitances to permit variation of the frequency over a frequency band. The second inductance may be a transformer. The variable capacitances may be constituted by a plurality of switchable component capacitances, having switches connected between the capacitances and ground.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.