Frequency agile switched resonator oscillator with noise degeneration
US5150080A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 1991 |
| Grant date | Sep 22, 1992 |
| Priority date | — |
| Expiry date | Dec 12, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B2202/076
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An oscillator includes an amplifier having an input and an output and a feedback circuit disposed between the input and the output of the amplifier. The feedback circuit includes a plurality of resonators and a pair of switches. Each switch includes a first port and multiple connectable ports, the multiple connectable ports of each switch connected to a corresponding one of the plurality of resonators. The feedback circuit further includes a voltage-controlled phase shifter disposed in series with the switches. The oscillator further includes a discriminator circuit, responsive to signals from the feedback circuit, for providing a control signal to the voltage-controlled phase shifter for degenerating low frequency noise within the oscillator. With such an arrangement, high Q low noise resonators can be switched in and out of the circuit thus providing improved phase noise performance at high power levels with the desirable frequency agility required for a microwave oscillator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.