Oscillator electronically tunable within a very wide frequency band
US4270097A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1979 |
| Grant date | May 26, 1981 |
| Priority date | — |
| Expiry date | Mar 6, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B2201/035
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An oscillator of the "three-terminal" type, comprising for example a field effect transistor, having a narrow spectrum and electronically tunable within a very wide frequency band in spite of its narrow spectrum due to a resonator of the yttrium garnet ball type. The field effect transistor has its source connected to a dipole comprising an electronically variable reactance and its gate connected to a similar dipole. A feedback loop is also established between input and output circuits of the oscillator. Under the action of a single command, acting for example on a magnetic field, the reactances vary simultaneously. In one embodiment, a single yttrium garnet ball resonator has two conductive half loops inserted in the tuning dipole and coupling dipole of the oscillator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.