| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1c2d1b17808513c2549c0ab26f24078d |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03F2200-336
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03F2200-504 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03F1-3258
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03F3-19
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03F3-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L27-361
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03F1-3288
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03F1-0222
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L25-03343 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04L25-03 |
| filingDate |
2004-06-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2007-09-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_92990134bedf7042d8d4a0f9338be731 |
| publicationDate |
2007-09-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-7274748-B1 |
| titleOfInvention |
AM to FM correction system for a polar modulator |
| abstract |
A transmitter for a mobile terminal including a polar modulator that compensates for amplitude to frequency distortion (AM to FM distortion) of a power amplifier in the transmit chain is provided. In general, the modulator includes a polar converter that converts an input signal into an amplitude signal and a phase signal. A phase to frequency converter converts the phase signal into a frequency signal. Based on the amplitude signal, compensation circuitry generates a frequency compensation signal that essentially cancels that AM to FM distortion of the power amplifier. A combiner combines the frequency signal and the frequency compensation signal, and the pre-distorted signal is converted into an analog frequency signal and amplified by the power amplifier. Accordingly, when the pre-distorted signal is amplified by the power amplifier, the frequency compensation signal essentially cancels the AM to FM distortion of the power amplifier. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8340602-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/TW-I740497-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10735229-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011188489-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2008026706-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009108952-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8565343-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7915969-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8064545-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2008159446-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9699014-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8391384-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7535310-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7978773-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2007229180-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2012170673-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8326239-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7715808-B2 |
| priorityDate |
2004-06-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |