LC oscillator with wide tuning range and low phase noise
US6876266B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 2003 |
| Grant date | Apr 5, 2005 |
| Priority date | — |
| Expiry date | May 23, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J2200/10
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A voltage-controlled oscillator including an active oscillator circuit, an inductor, and capacitive circuits is disclosed. The capacitive circuits are selectively turned on and off to control the frequency of the voltage-controlled oscillator. Particularly, the inductor and the capacitors in the capacitive circuits form LC circuits that provide feedback to the active oscillator circuit. To avoid damage to the switches in the capacitive circuits, the capacitive circuits further comprise resistors. The resistors can be configured in several different ways so that the voltage-controlled oscillator can have a high degree of reliability, and a wide tuning range with constant phase noise performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.