Piezoelectric filter stage selectably connectable in series with another piezoelectric filter stage
US5162759A · kind A · utility
17Cited by
6References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 29, 1991 |
| Grant date | Nov 10, 1992 |
| Priority date | — |
| Expiry date | Mar 29, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/545
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A band-pass filter includes a first filter, a second filter, and switching elements. The first filter is constituted by a plurality of filter elements. The second filter is constituted by a plurality of filter means and connected in series with the first filter. The switching elements can short-circuit either one of the first and second filters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.