Programmable phase coded surface wave device
US3961290A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 7, 1975 |
| Grant date | Jun 1, 1976 |
| Priority date | — |
| Expiry date | Feb 7, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/6416
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A surface wave device (SWD) programmable to produce any one of a plurality of phase coded SWD digital delay line configurations from a single transducer pattern characterized by parallel transducer electrode arrays to provide for each of two opposite phase alternatives of acoustic surface waves being propagated. Each transducer comprises pairs of interdigital taps, each tap characterizing a single binary bit. Transducer phase coding is accomplished by severing in selected taps all metalized fingers of like polarity from their common conductor bar. Critical configuration tolerances prohibitive to programmed operations are thus obviated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.