Inventor · disambiguated record
Eric J. Swanson
Also filed as: SWANSON ERIC · SWANSON ERIC J · SWANSON ERIC JOHN
79 granted patents·1 pending application·3,164 citations·filing 1982–2018
99Inventor score
Files withCIRRUS LOGIC INC33CRYSTAL SEMICONDUCTOR CORP17AT & T BELL LAB6CRYSTAL SEMICONDUCTOR4DROPBOX INC3
Top patents by PatentIndex Score
80 records- 0198US9479578B1Randomized peer-to-peer synchronization of shared content itemsDROPBOX INC·Filed 2015·Granted Oct 25, 2016·68 cites·20 claims
- 0298US7808324B1Operating environment and process position selected charge-pump operating mode in an audio power amplifier integrated circuitCIRRUS LOGIC INC·Filed 2009·Granted Oct 5, 2010·80 cites·21 claims
- 0398US6590517B1Analog to digital conversion circuitry including backup conversion circuitryFiled 2002·Granted Jul 8, 2003·104 cites·44 claims
- 0498US4518926AGate-coupled field-effect transistor pair amplifierAT & T BELL LAB·Filed 1982·Granted May 21, 1985·126 cites·6 claims
- 0597US8093951B1Pulse-width modulated (PWM) audio power amplifier having output signal magnitude controlled pulse voltage and switching frequencyZHANG LINGLI·Filed 2009·Granted Jan 10, 2012·105 cites·10 claims
- 0696US5319370AAnalog-to-digital converter with a continuously calibrated voltage referenceCRYSTAL SEMICONDUCTOR INC·Filed 1992·Granted Jun 7, 1994·216 cites·14 claims
- 0795US5440305AMethod and apparatus for calibration of a monolithic voltage referenceCRYSTAL SEMICONDUCTOR CORP·Filed 1992·Granted Aug 8, 1995·190 cites·30 claims
- 0895US5157395AVariable decimation architecture for a delta-sigma analog-to-digital converterCRYSTAL SEMICONDUCTOR CORP·Filed 1991·Granted Oct 20, 1992·137 cites·38 claims
- 0995US5012244ADelta-sigma modulator with oscillation detect and reset circuitCRYSTAL SEMICONDUCTOR CORP·Filed 1989·Granted Apr 30, 1991·159 cites·28 claims
- 1094US5594439ADiagnosing problems in an electrical system by monitoring changes in nonlinear characteristicsCRYSTAL SEMICONDUCTOR CORP·Filed 1994·Granted Jan 14, 1997·104 cites·26 claims
- 1193US8525710B1Audio amplifier offset reduction using digital input/output comparisonsTSANG ROBIN MATTHEW·Filed 2010·Granted Sep 3, 2013·24 cites·21 claims
- 1293US6414619B1Autoranging analog to digital conversion circuitryFiled 2001·Granted Jul 2, 2002·55 cites·86 claims
- 1393US5777912ALinear phase finite impulse response filter with pre-additionCRYSTAL SEMICONDUCTOR CORP·Filed 1996·Granted Jul 7, 1998·85 cites·32 claims
- 1493US5079550ACombining continuous time and discrete time signal processing in a delta-sigma modulatorCRYSTAL SEMICONDUCTOR CORP·Filed 1989·Granted Jan 7, 1992·68 cites·14 claims
- 1593US4746899AMethod for reducing effects of electrical noise in an analog-to-digital converterCRYSTAL SEMICONDUCTOR CORP·Filed 1986·Granted May 24, 1988·83 cites·4 claims
- 1691US9210493B2Wireless earpiece with local audio cacheCIRRUS LOGIC INC·Filed 2013·Granted Dec 8, 2015·11 cites·23 claims
- 1791US6486806B1Systems and methods for adaptive auto-calibration of Radix<2 A/D SAR converters with internally generated stimuliCIRRUS LOGIC INC·Filed 1999·Granted Nov 26, 2002·88 cites·24 claims
- 1890US9407991B2Systems and methods for using a speaker as a microphone in a mobile deviceCIRRUS LOGIC INC·Filed 2015·Granted Aug 2, 2016·6 cites·22 claims
- 1990US6288664B1Autoranging analog to digital conversion circuitryFiled 1999·Granted Sep 11, 2001·62 cites·96 claims
- 2090US5121080AAmplifier with controlled output impedanceCRYSTAL SEMICONDUCTOR CORP·Filed 1990·Granted Jun 9, 1992·51 cites·24 claims
- 2189US5257026AMethod and apparatus for calibrating a multi-bit delta-sigma modularCRYSTAL SEMICONDUCTOR INC·Filed 1992·Granted Oct 26, 1993·83 cites·33 claims
- 2288US8008975B1Gate-boosted, variable voltage supply rail amplifierCIRRUS LOGIC INC·Filed 2009·Granted Aug 30, 2011·17 cites·29 claims
- 2387US9329614B1Bandgap with thermal drift correctionCIRRUS LOGIC INC·Filed 2013·Granted May 3, 2016·11 cites·23 claims
- 2487US6271780B1Gain ranging analog-to-digital converter with error correctionCIRRUS LOGIC INC·Filed 1998·Granted Aug 7, 2001·97 cites·36 claims
- 2586US9008344B2Systems and methods for using a speaker as a microphone in a mobile deviceCIRRUS LOGIC INC·Filed 2013·Granted Apr 14, 2015·6 cites·26 claims
- 2686US4849662ASwitched-capacitor filter having digitally-programmable capacitive elementCRYSTAL SEMICONDUCTOR CORP·Filed 1986·Granted Jul 18, 1989·36 cites·3 claims
- 2786US4618815AMixed threshold current mirrorAT & T BELL LAB·Filed 1985·Granted Oct 21, 1986·38 cites·6 claims
- 2886US4611130AFloating input comparator with precharging of input parasitic capacitorsAT & T BELL LAB·Filed 1984·Granted Sep 9, 1986·29 cites·11 claims
- 2985US6424276B1Successive approximation algorithm-based architectures and systemsCIRRUS LOGIC INC·Filed 1999·Granted Jul 23, 2002·57 cites·19 claims
- 3085US5608676ACurrent limited current reference for non-volatile memory sensingCRYSTAL SEMICONDUCTOR CORP·Filed 1993·Granted Mar 4, 1997·65 cites·5 claims
- 3185US5068660ACombining fully-differential and single-ended signal processing in a delta-sigma modulatorCRYSTAL SEMICONDUCTOR CORP·Filed 1989·Granted Nov 26, 1991·39 cites·9 claims
- 3285US4477782ACompound current mirrorAT & T BELL LAB·Filed 1983·Granted Oct 16, 1984·26 cites·15 claims
- 3384US9788094B2Wireless earpiece with local audio cacheCIRRUS LOGIC INC·Filed 2016·Granted Oct 10, 2017·3 cites·20 claims
- 3481US6452519B1Analog to digital converter utilizing a highly stable resistor stringFiled 1999·Granted Sep 17, 2002·36 cites·52 claims
- 3581US6252454B1Calibrated quasi-autozeroed comparator systems and methodsCIRRUS LOGIC INC·Filed 1999·Granted Jun 26, 2001·46 cites·15 claims
- 3681US5351050ADetent switching of summing node capacitors of a delta-sigma modulatorCRYSTAL SEMICONDUCTOR CORP·Filed 1992·Granted Sep 27, 1994·46 cites·12 claims
- 3780US10412479B2Headset management by microphone terminal characteristic detectionCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2016·Granted Sep 10, 2019·4 cites·20 claims
- 3880US6331785B1Polling to determine optimal impedanceCIRRUS LOGIC INC·Filed 2000·Granted Dec 18, 2001·23 cites·20 claims
- 3980US5644257ASampling circuit charge managementCRYSTAL SEMICONDUCTOR CORP·Filed 1996·Granted Jul 1, 1997·48 cites·12 claims
- 4080US5061925APhase equalization system for a digital-to-analog converter utilizing separate digital and analog sectionsCRYSTAL SEMICONDUCTOR CORP·Filed 1990·Granted Oct 29, 1991·45 cites·12 claims
- 4179US9510078B2Wireless earpiece with local audio cacheCIRRUS LOGIC INC·Filed 2015·Granted Nov 29, 2016·2 cites·31 claims
- 4279US6310518B1Programmable gain preamplifierFiled 1999·Granted Oct 30, 2001·43 cites·70 claims
- 4379US5719573AAnalog modulator for A/D converter utilizing leap-frog filterCIRRUS LOGIC INC·Filed 1995·Granted Feb 17, 1998·45 cites·18 claims
- 4477US10225653B2Systems and methods for using a piezoelectric speaker as a microphone in a mobile deviceCIRRUS LOGIC INC·Filed 2017·Granted Mar 5, 2019·2 cites·37 claims
- 4576US7746257B2Delta-sigma analog-to-digital converter circuit having reduced sampled reference noiseCIRRUS LOGIC INC·Filed 2009·Granted Jun 29, 2010·9 cites·20 claims
- 4674US10116215B2Buck-boost converter for an audio amplifier with multiple operations modesCIRRUS LOGIC INC·Filed 2015·Granted Oct 30, 2018·2 cites·34 claims
- 4774US6417794B1System and apparatus for digitally calibrating capacitors in an analog-to-digital converter using successive approximationCIRRUS LOGIC INC·Filed 1999·Granted Jul 9, 2002·36 cites·13 claims
- 4874US5247210AMethod and circuitry for decreasing the recovery time of an MOS differential voltage comparatorCRYSTAL SEMICONDUCTOR·Filed 1991·Granted Sep 21, 1993·27 cites·13 claims
- 4973US6977607B2SAR with partial capacitor sampling to reduce parasitic capacitanceSILICON LABS CP INC·Filed 2004·Granted Dec 20, 2005·19 cites·24 claims
- 5072US6255975B1Circuits and methods for noise filtering in 1-bit audio applications and systems using the sameCIRRUS LOGIC INC·Filed 1999·Granted Jul 3, 2001·31 cites·23 claims
Showing the top 50 of 80 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →