http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7268594-B1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_70ca3ea7752cc2ae9b2687d93d702a99 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G06F1-025 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03B21-00 |
| filingDate | 2005-05-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2007-09-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9f8f264f44531ea5e5337ca94dd478e6 |
| publicationDate | 2007-09-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-7268594-B1 |
| titleOfInvention | Direct digital synthesis with low jitter |
| abstract | An FPGA having a programmable frequency output is provided that achieves a (theoretical) M-times reduction in output jitter from a conventional direct digital synthesis (DDS) circuit, by running M accumulator circuits in parallel and combining the outputs in a time-staggered way. I Initially the frequency number N added into the accumulators is varied slightly for each accumulator by multiplying by a number, such as X/16 where X varies from 1 to 16 for each of 16 accumulator circuits. The accumulator circuits are further reconfigured so that the output of a register from a first accumulator provides feedback to the adder input in all of the accumulator circuits. The number of overflowing accumulator registers in a clock cycle will then indicate granularity spatially. To translate spatial granularity to time, a programmable delay circuit is connected to the output of each accumulator register. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8352526-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10437946-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114995586-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7952516-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2022350600-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2021145925-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2008074311-A1 |
| priorityDate | 2005-05-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 30.