Saw stabilized oscillator with controlled pull-range
US4581592A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 3, 1983 |
| Grant date | Apr 8, 1986 |
| Priority date | — |
| Expiry date | May 3, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B5/326
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An oscillator including an active device (38), a surface acoustic wave resonator (40) connected in a feedback relationship to the active device and an impedance matching circuit is disclosed. The impedance matching circuit in one arrangement is an output impedance matching circuit including an inductor (46) connected in the feedback loop to the output of the active device. In another arrangement, the impedance matching network is an input impedance matching network including an inductor (42) connected in the feedback loop to the input of the active device. In another arrangement of the invention, a varactor diode (60) is connected in the feedback loop and is controlled by a reverse voltage which changes the capacitance of the diode, adjusting the frequency of the oscillator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.