Fractional-N synthesizer with improved noise performance
US6693468B2 · kind B2 · utility
32Cited by
68References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2001 |
| Grant date | Feb 17, 2004 |
| Priority date | — |
| Expiry date | Jun 12, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/1976
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A fractional sequence generator having a plurality of cascaded accumulators whose carry-outs-upon-overflow are provided over a plurality of recombination paths and selective delays to an adder, the pattern of selective delays being modified by the addition of delay elements in all recombination paths except the last to reduce the number of quantization error terms in the transfer function of the sequence generator. Illustrative embodiments may have any number (greater than one) of accumulators and recombination paths, while continuing to exhibit desired simplified frequency response characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.