Surface acoustic wave apparatus
US3969590A · kind A · utility
5Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 1975 |
| Grant date | Jul 13, 1976 |
| Priority date | — |
| Expiry date | Apr 4, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2014
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A modulating system using a surface acoustic wave device for receiving impulses and providing, as an output, shaped carrier signals for transmitting data. The preferred embodiment uses impulses of positive and negative polarities to provide minimum shift keyed modulated output signals wherein the carrier frequency is an odd one-quarter multiple of the repetition rate of the impulses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.