Feedback oscillator circuit using a saw resonator filter
US5789990A · kind A · utility
4Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1996 |
| Grant date | Aug 4, 1998 |
| Priority date | — |
| Expiry date | Feb 14, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B5/326
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A crystal-controlled oscillator circuit is modified by the present invention by replacing the crystal with the first signal port of a two-port SAW resonator filter that has a low-loss primarily inductive characteristic and taking the oscillation output from the other port of the filter to provide an oscillator frequency with harmonics that are reduced significantly when compared to the output of a crystal-controlled oscillator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.