Synthesizer structures and alignment methods that facilitate quadrature demodulation
US6822519B1 · kind B1 · utility
4Cited by
8References
31Claims
0Family size
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Key dates
| Filing date | Feb 10, 2003 |
| Grant date | Nov 23, 2004 |
| Priority date | — |
| Expiry date | Jun 14, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J2200/03
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Synthesizer structures and alignment methods are provided that facilitate quadrature demodulation. The structures are realized with phase-locked loops that include half-rate frequency dividers to provide loop output signals with a wide range of output frequencies and with frequency dividers that provide quadrature signals in response to the output signals. The structures include controllers that direct alignment methods which lock a VCO to a reference signal from a reference frequency divider to thereby provide the output signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.