Voltage controlled oscillator
US7312670B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2005 |
| Grant date | Dec 25, 2007 |
| Priority date | — |
| Expiry date | Sep 2, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B5/1293
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The voltage controlled oscillator comprises an oscillating system wherein two variable capacitors are alternately connected. The capacitances of these two capacitors vary respectively in the same direction as the voltage that is applied thereto and in the opposite direction. Replacing one variable capacitor by the other is performed automatically when the output frequency of the oscillator reaches a predetermined switching value. It is thus possible to divide an operating frequency band of the oscillator into at least two parts in which the frequency varies alternately in the same direction as the control voltage of the oscillator and in the opposite direction. Switchable fixed capacitors can be connected in the oscillating system, either when one variable capacitor is replaced by the other or by means of a command, to make the oscillator switch from one frequency band to a lower band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.