Varactorless tunable oscillator
US8665033B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2011 |
| Grant date | Mar 4, 2014 |
| Priority date | — |
| Expiry date | Feb 18, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B5/1296
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A tunable oscillator circuit is disclosed. The tunable oscillator circuit includes an inductor/capacitor (LC) tank circuit comprising a primary inductor coupled in parallel with a first capacitor bank. The LC tank resonates to produce an oscillating voltage at a frequency. The tunable oscillator circuit also includes a 90 degree phase shift buffer coupled to the LC tank and a transconductor. The transconductor is coupled to the 90 degree phase shift buffer and a secondary inductor. The tunable oscillator circuit also includes a secondary inductor that is inductively coupled to the primary inductor and receives a gain-scaled oscillating current from the transconductor. By changing the transconductance, the gain-scaled oscillating current in the secondary inductor will change, thus the effective primary inductance and the oscillation frequency can be tuned.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.