Multiple co-surface acoustic wave filters
US4315228A · kind A · utility
9Cited by
7References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 3, 1980 |
| Grant date | Feb 9, 1982 |
| Priority date | — |
| Expiry date | Jul 3, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/14508
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Apparatus for providing a plurality of filtered outputs is described incorporating a substrate suitable for propagating surface acoustic waves having an input transducer, a first plurality of spaced-apart taps coupled together, a second plurality of spaced-apart taps coupled together where at least two of the second plurality of taps are positioned in spaces between the first plurality of taps. The invention overcomes the problem of providing separate substrate surface area for each plurality of taps coupled together.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.