http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-100671525-B1
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03M7-3022 |
| classificationCPCInventive | 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/H03K11-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03F3-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03M1-82 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H02M7-48 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03H17-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03K7-08 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/H03F3-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H02M7-48 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03K11-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03M1-82 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03F3-217 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03H17-02 |
| filingDate | 2004-09-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2007-01-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2007-01-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | KR-100671525-B1 |
| titleOfInvention | Method and apparatus for converting PCM to PCM |
| abstract | Circuitry is provided for converting an input serial pulse code modulated (PCM) digital signal into an output pulse width modulated (PWM) digital signal to drive a switching audio amplifier requiring a pulse width modulated input signal. Receiving the input serial PCM digital signal at a first sampling frequency and then converting the input serial PCM digital signal to a second serial PCM digital signal at the second frequency when the first sampling frequency is lower than a second frequency; A sample rate converter; A digital filter stage for upsampling said second serial PCM digital signal to a third frequency and converting said second serial PCM digital signal into a parallel digital signal; A volume control stage which receives the parallel digital signal and generates a parallel digital signal whose volume is adjusted in accordance with a digital volume command control signal; A digital crossover estimator stage for calculating an intersection point between said volume adjusted parallel digital signal and a digital ramp signal and generating a parallel digital signal indicative of a desired pulse width modulation of said switching audio amplifier; A quantization stage for quantizing the parallel digital signal representing the desired pulse width modulation with a quantized parallel digital signal representing pulse width modulation to be applied to the switching audio amplifier; And a PWM generating stage for converting the quantized parallel digital signal into a PWM signal for driving the switching audio amplifier.n n n n PCM, PWM, Quantization, Feedback Control, Switching Circuits, Volume Control, Gain Control |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9942682-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2015081853-A1 |
| priorityDate | 2003-09-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 38.