Coupling for LC-based VCO
US6650188B1 · kind B1 · utility
1Cited by
11References
14Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 2, 2002 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Dec 2, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B2200/0078
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A two-stage coupling loop system that provides in-phase and quadrature signals in the two stages. Each stage includes a signal coupler, an LC-based voltage controlled oscillator (VCO) and an in-loop signal buffer that provides an additional controllable phase shift. Inclusion of the buffers in the loop decreases the capacitance load of each VCO.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.