Assignee
D2AUDIO CORP
US·29 granted patents·689 citations·filing 2004–2009
Top patents by PatentIndex Score
29 records- 0199US7649410B2Systems and methods for improving performance in a digital amplifier by adding an ultrasonic signal to an input audio signalD2AUDIO CORP·Filed 2007·Granted Jan 19, 2010·112 cites·33 claims
- 0297US7286009B2Digital PWM amplifier with simulation-based feedbackD2AUDIO CORP·Filed 2005·Granted Oct 23, 2007·62 cites·20 claims
- 0397US7167112B2Systems and methods for implementing a sample rate converter using hardware and software to maximize speed and flexibilityD2AUDIO CORP·Filed 2004·Granted Jan 23, 2007·121 cites·12 claims
- 0495US7078963B1Integrated PULSHI mode with shutdownD2AUDIO CORP·Filed 2004·Granted Jul 18, 2006·87 cites·14 claims
- 0592US7259618B2Systems and methods for load detection and correction in a digital amplifierD2AUDIO CORP·Filed 2005·Granted Aug 21, 2007·21 cites·20 claims
- 0690US7286010B2Systems and methods for over-current protectionD2AUDIO CORP·Filed 2006·Granted Oct 23, 2007·17 cites·20 claims
- 0789US7728658B2Low-noise, low-distortion digital PWM amplifierD2AUDIO CORP·Filed 2007·Granted Jun 1, 2010·19 cites·22 claims
- 0889US7576606B2Digital PWM amplifier having a low delay correctorD2AUDIO CORP·Filed 2007·Granted Aug 18, 2009·16 cites·7 claims
- 0988US7023268B1Systems and methods for automatically adjusting channel timingD2AUDIO CORP·Filed 2004·Granted Apr 4, 2006·48 cites·2 claims
- 1084US7061312B2Systems and methods for providing multi channel pulse width modulated audio with staggered outputsD2AUDIO CORP·Filed 2004·Granted Jun 13, 2006·39 cites·13 claims
- 1183US7482865B2Systems and methods for correcting errors resulting from component mismatch in a feedback pathD2AUDIO CORP·Filed 2007·Granted Jan 27, 2009·13 cites·20 claims
- 1282US7362254B2Systems and methods for minimizing delay in a control pathD2AUDIO CORP·Filed 2007·Granted Apr 22, 2008·13 cites·20 claims
- 1378US7929718B1Systems and methods for switching and mixing signals in a multi-channel amplifierD2AUDIO CORP·Filed 2004·Granted Apr 19, 2011·23 cites·36 claims
- 1478US7812666B2Low delay correctorD2AUDIO CORP·Filed 2009·Granted Oct 12, 2010·8 cites·21 claims
- 1575US7791427B2Systems and methods to minimize startup transients in class D amplifiersD2AUDIO CORP·Filed 2007·Granted Sep 7, 2010·6 cites·20 claims
- 1672US7518444B2PWM feedback/feed-forward protectionD2AUDIO CORP·Filed 2007·Granted Apr 14, 2009·7 cites·22 claims
- 1770US7738613B1Streaming multi-channel audio as packetized data or parallel data with a separate input frame syncD2AUDIO CORP·Filed 2004·Granted Jun 15, 2010·13 cites·20 claims
- 1870US7474722B1Systems and methods for sample rate conversion using multiple rate estimate countersD2AUDIO CORP·Filed 2004·Granted Jan 6, 2009·11 cites·18 claims
- 1968US7908306B1SRC with multiple sets of filter coefficients in memory and a high order coefficient interpolatorD2AUDIO CORP·Filed 2004·Granted Mar 15, 2011·12 cites·18 claims
- 2066US7590251B2Clip detection in PWM amplifierD2AUDIO CORP·Filed 2004·Granted Sep 15, 2009·10 cites·29 claims
- 2163US7706545B2Systems and methods for protection of audio amplifier circuitsD2AUDIO CORP·Filed 2004·Granted Apr 27, 2010·12 cites·21 claims
- 2260US7425853B2Systems and methods for pulse width modulating asymmetric signal levelsD2AUDIO CORP·Filed 2007·Granted Sep 16, 2008·4 cites·20 claims
- 2356US7315264B2Systems and methods for controlling transient response in the output of a noise shaperD2AUDIO CORP·Filed 2006·Granted Jan 1, 2008·3 cites·20 claims
- 2453US7436255B2Power supply feed forward analog input filter component mismatch correctionD2AUDIO CORP·Filed 2007·Granted Oct 14, 2008·2 cites·19 claims
- 2551US7584009B2Multi-chip PWM synchronization and communicationD2AUDIO CORP·Filed 2004·Granted Sep 1, 2009·4 cites·22 claims
- 2649US8028101B2Systems and methods for controlling HDA system capabilitiesD2AUDIO CORP·Filed 2008·Granted Sep 27, 2011·0 cites·23 claims
- 2749US7729790B1Phase alignment of audio output data in a multi-channel configurationD2AUDIO CORP·Filed 2004·Granted Jun 1, 2010·5 cites·26 claims
- 2839US7436256B2Systems and methods for maintaining minimum pulse width during shutdownD2AUDIO CORP·Filed 2007·Granted Oct 14, 2008·0 cites·17 claims
- 2938US7436918B2Output stage synchronizationD2AUDIO CORP·Filed 2004·Granted Oct 14, 2008·1 cites·9 claims
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