| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_fe950d708c7cd3395969c85dcbe67c67 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03M7-3022 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03M1-82
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03M5-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03M3-506
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03F3-38
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H02M7-48
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03K11-00 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03K7-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03M1-82
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03K11-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03F3-68
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03M3-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03F3-217
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03H17-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03H17-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03F3-38 |
| filingDate |
2004-09-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c5bf3e08a2786d02eacac9944d7018f8 |
| publicationDate |
2005-06-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
JP-2005143090-A |
| titleOfInvention |
Method and apparatus for converting PCM to PWM |
| abstract |
PROBLEM TO BE SOLVED: To provide a circuit for driving a switching voice amplifier that converts an input serial pulse code modulation (PCM) digital signal into an output pulse width modulation (PWM) digital signal and requires a pulse width modulation input signal. When a first sampling frequency is lower than a second frequency, an input serial PCM digital signal is converted to a second serial PCM digital signal at the second frequency, up-sampled to a third frequency, and parallel. Convert to digital signal. Generate a volume-adjusted parallel digital signal according to the digital volume command control signal, calculate a crosspoint between this and the digital ramp signal, and generate a parallel digital signal representing the desired pulse width modulation of the switching audio amplifier . The parallel digital signal representing the desired pulse width modulation is quantized into a quantized parallel digital signal representing the pulse width modulation applied to the switching audio amplifier and converted to a PWM signal. [Selection] Figure 1 |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10886883-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-WO2007010742-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2007150833-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-4688175-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2008141447-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110754040-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110754040-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-4587222-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110034729-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110034729-A |
| priorityDate |
2003-09-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |