http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2010195757-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_05d3eed9dc3bf1d2fed7cb82d27174d2 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04B2001-0491 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03D7-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L25-03 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03C3-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04B1-408 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04B1-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03D3-006 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04L27-00 |
| filingDate | 2010-04-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_eaa1a75aa4f39986c199f16a73774667 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7255758f054b24b74f3d29ec3da46554 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_859a406080d2fe5f7770c4fcf5a20481 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2f498ed69c5416b0683e5471b5bc078d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_dba4e6aad7033eadb40f648729b1954a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_41eff793f75f41977d1ccbe1175c6c1a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b8f2a1b901c3e3fc55d2bd73d0a77068 |
| publicationDate | 2010-08-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-2010195757-A1 |
| titleOfInvention | Apparatus and method of differential IQ frequency up-conversion |
| abstract | A balanced transmitter up-converts I and Q baseband signals directly from baseband-to-RF. The up-conversion process is sufficiently linear that no IF processing is required, even in communications applications that have stringent requirements on spectral growth. In operation, the balanced modulator sub-harmonically samples the I and Q baseband signals in a balanced and differential manner, resulting in harmonically rich signal. The harmonically rich signal contains multiple harmonic images that repeat at multiples of the sampling frequency, where each harmonic contains the necessary information to reconstruct the I and Q baseband signals. The differential sampling is performed according to a first and second control signals that are phase shifted with respect to each other. In embodiments of the invention, the control signals have pulse widths (or apertures) that operate to improve energy transfer to a desired harmonic in the harmonically rich signal. A bandpass filter can then be utilized to select the desired harmonic of interest from the harmonically rich signal. |
| priorityDate | 1999-04-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 26.