Acoustic surface wave filters
US4030050A · kind A · utility
6Cited by
9References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1975 |
| Grant date | Jun 14, 1977 |
| Priority date | — |
| Expiry date | Sep 25, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/02637
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An acoustic surface wave filter for use as an intermediate frequency filter in a P.A.L. color television receiver comprising input and output transducers each having fingers of conductive material supported on a piezoelectric substrate the fingers of each transducer being electrically connected to a pair of terminal pads so that the fingers connected to one pad interleave with the fingers connected to the other pad, the transducers being mutually offset in a direction orthogonal to the direction of acoustic surface wave propagation and coupled by means of a multistrip coupler.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.