Inventor · disambiguated record
Richard Alexander Erhart
Also filed as: ERHART RICHARD · ERHART RICHARD A · ERHART RICHARD ALEXANDER
56 granted patents·2 pending applications·1,865 citations·filing 1988–2017
99Inventor score
Files withSYNAPTICS INC13NAT SEMICONDUCTOR CORP11VIVID SEMICONDUCTOR INC10DEAN GREGORY LEWIS4EGIS TECH INC4
Top patents by PatentIndex Score
58 records- 0197US8520913B2Apparatus and method for reducing noise in fingerprint sensing circuitsDEAN GREGORY LEWIS·Filed 2012·Granted Aug 27, 2013·51 cites·32 claims
- 0296US8116540B2Apparatus and method for reducing noise in fingerprint sensing circuitsDEAN GREGORY LEWIS·Filed 2008·Granted Feb 14, 2012·119 cites·16 claims
- 0396US8005276B2Apparatus and method for reducing parasitic capacitive coupling and noise in fingerprint sensing circuitsVALIDITY SENSORS INC·Filed 2008·Granted Aug 23, 2011·78 cites·20 claims
- 0496US7953258B2Fingerprint sensing circuit having programmable sensing patternsVALIDITY SENSORS INC·Filed 2008·Granted May 31, 2011·77 cites·20 claims
- 0596US7643950B1System and method for minimizing power consumption for an object sensorNAT SEMICONDUCTOR CORP·Filed 2005·Granted Jan 5, 2010·121 cites·20 claims
- 0696US7460697B2Electronic fingerprint sensor with differential noise cancellationVALIDITY SENSORS INC·Filed 2005·Granted Dec 2, 2008·90 cites·21 claims
- 0795US10203816B2Apparatus and method for TFT fingerprint sensorEGIS TECH INC·Filed 2014·Granted Feb 12, 2019·23 cites·19 claims
- 0895US9406580B2Packaging for fingerprint sensors and methods of manufactureERHART RICHARD ALEXANDER·Filed 2012·Granted Aug 2, 2016·19 cites·12 claims
- 0994US10203826B2Apparatus and method for TFT fingerprint sensorEGIS TECH INC·Filed 2017·Granted Feb 12, 2019·10 cites·22 claims
- 1094US10203827B2Apparatus and method for TFT fingerprint sensorEGIS TECH INC·Filed 2017·Granted Feb 12, 2019·11 cites·14 claims
- 1194US10203828B2Apparatus and method for TFT fingerprint sensorEGIS TECH INC·Filed 2017·Granted Feb 12, 2019·10 cites·17 claims
- 1294US9665762B2Tiered wakeup strategySYNAPTICS INC·Filed 2013·Granted May 30, 2017·46 cites·24 claims
- 1393US10043053B2Systems and methods for authenticating a user of a biometric sensorSYNAPTICS INC·Filed 2017·Granted Aug 7, 2018·9 cites·20 claims
- 1493US9274553B2Fingerprint sensor and integratable electronic displayERHART RICHARD ALEXANDER·Filed 2012·Granted Mar 1, 2016·21 cites·38 claims
- 1593US6970152B1Stacked amplifier arrangement for graphics displaysNAT SEMICONDUCTOR CORP·Filed 2002·Granted Nov 29, 2005·61 cites·22 claims
- 1693US5510748AIntegrated circuit having different power supplies for increased output voltage range while retaining small device geometriesVIVID SEMICONDUCTOR INC·Filed 1994·Granted Apr 23, 1996·121 cites·3 claims
- 1793US5465054AHigh voltage CMOS logic using low voltage CMOS processVIVID SEMICONDUCTOR INC·Filed 1994·Granted Nov 7, 1995·80 cites·25 claims
- 1892US9400911B2Fingerprint sensor and integratable electronic displayERHART RICHARD ALEXANDER·Filed 2011·Granted Jul 26, 2016·18 cites·31 claims
- 1992US9001040B2Integrated fingerprint sensor and navigation deviceDEAN GREGORY LEWIS·Filed 2010·Granted Apr 7, 2015·18 cites·5 claims
- 2092US8107212B2Apparatus and method for protecting fingerprint sensing circuitry from electrostatic dischargeNELSON RICHARD BRIAN·Filed 2007·Granted Jan 31, 2012·87 cites·25 claims
- 2191US5528256APower-saving circuit and method for driving liquid crystal displayVIVID SEMICONDUCTOR INC·Filed 1994·Granted Jun 18, 1996·94 cites·6 claims
- 2290US9152838B2Fingerprint sensor packagings and methodsSYNAPTICS INC·Filed 2013·Granted Oct 6, 2015·10 cites·20 claims
- 2390US8278946B2Apparatus and method for detecting finger activity on a fingerprint sensorTHOMPSON ERIK JONATHON·Filed 2009·Granted Oct 2, 2012·34 cites·30 claims
- 2489US9760757B2Systems and methods for authenticating a user of a biometric sensorSYNAPTICS INC·Filed 2016·Granted Sep 12, 2017·6 cites·20 claims
- 2588US6861886B1Clock deskew protocol using a delay-locked loopNAT SEMICONDUCTOR CORP·Filed 2003·Granted Mar 1, 2005·61 cites·20 claims
- 2687US5572211AIntegrated circuit for driving liquid crystal display using multi-level D/A converterVIVID SEMICONDUCTOR INC·Filed 1994·Granted Nov 5, 1996·85 cites·36 claims
- 2785US9594498B2Integrated fingerprint sensor and navigation deviceSYNAPTICS INC·Filed 2015·Granted Mar 14, 2017·4 cites·29 claims
- 2885USRE45601EFingerprint sensing circuit having programmable sensing patternsSYNAPTICS INC·Filed 2013·Granted Jul 7, 2015·9 cites·21 claims
- 2985US5578957AIntegrated circuit having different power supplies for increased output voltage range while retaining small device geometriesVIVID SEMICONDUCTOR INC·Filed 1995·Granted Nov 26, 1996·43 cites·7 claims
- 3083US8593160B2Apparatus and method for finger activity on a fingerprint sensorTHOMPSON ERIK JONATHON·Filed 2012·Granted Nov 26, 2013·10 cites·20 claims
- 3183US5604449ADual I/O logic for high voltage CMOS circuit using low voltage CMOS processesVIVID SEMICONDUCTOR INC·Filed 1996·Granted Feb 18, 1997·49 cites·7 claims
- 3282US9137438B2Biometric object sensor and methodSYNAPTICS INC·Filed 2013·Granted Sep 15, 2015·5 cites·28 claims
- 3382US6954201B1Data bus system and protocol for graphics displaysNAT SEMICONDUCTOR CORP·Filed 2002·Granted Oct 11, 2005·24 cites·19 claims
- 3482US5852426APower-saving circuit and method for driving liquid crystal displayVIVID SEMICONDUCTOR INC·Filed 1996·Granted Dec 22, 1998·56 cites·29 claims
- 3579USRE44440ESystem and method for minimizing power consumption for an object sensorGETZIN LAWRENCE·Filed 2012·Granted Aug 13, 2013·8 cites·40 claims
- 3679US6529049B2Pre-charged sample and holdNAT SEMICONDUCTOR CORP·Filed 2001·Granted Mar 4, 2003·29 cites·9 claims
- 3778US9195877B2Methods and devices for capacitive image sensingSYNAPTICS INC·Filed 2012·Granted Nov 24, 2015·4 cites·16 claims
- 3876US8787632B2Apparatus and method for reducing noise in fingerprint sensing circuitsSYNAPTICS INC·Filed 2013·Granted Jul 22, 2014·4 cites·27 claims
- 3976US7317775B1Switched deskew on arbitrary dataNAT SEMICONDUCTOR CORP·Filed 2004·Granted Jan 8, 2008·22 cites·21 claims
- 4075US5754156ALCD driver IC with pixel inversion operationVIVID SEMICONDUCTOR INC·Filed 1996·Granted May 19, 1998·46 cites·8 claims
- 4174US8600122B2Apparatus and method for culling substantially redundant data in fingerprint sensing circuitsDEAN GREGORY LEWIS·Filed 2009·Granted Dec 3, 2013·10 cites·20 claims
- 4274US5818252AReduced output test configuration for tape automated bondingVIVID SEMICONDUCTOR INC·Filed 1996·Granted Oct 6, 1998·43 cites·1 claims
- 4372US6201522B1Power-saving circuit and method for driving liquid crystal displayNAT SEMICONDUCTOR CORP·Filed 1998·Granted Mar 13, 2001·34 cites·29 claims
- 4470US10048787B2Fingerprint sensor and integratable electronic displaySYNAPTICS INC·Filed 2016·Granted Aug 14, 2018·1 cites·34 claims
- 4563US6040815ALCD drive IC with pixel inversion operationVIVID SEMICONDUCTOR INC·Filed 1998·Granted Mar 21, 2000·26 cites·1 claims
- 4658US2014328522A1Apparatus and method for reducing noise in fingerprint sensing circuitsSYNAPTICS INC·Filed 2014·Application pending·0 cites
- 4757US5389872ASignal processing system and method of reducing switch error attributable to switch impedancesMEDTRONIC INC·Filed 1993·Granted Feb 14, 1995·21 cites·9 claims
- 4855US4912730AHigh speed reception of encoded data utilizing dual phase resynchronizing clock recoveryHARRIS CORP·Filed 1988·Granted Mar 27, 1990·19 cites·10 claims
- 4954US7095407B1Method and apparatus for reducing noise in a graphics display systemNAT SEMICONDUCTOR CORP·Filed 2003·Granted Aug 22, 2006·4 cites·31 claims
- 5051USRE45650EApparatus and method for reducing parasitic capacitive coupling and noise in fingerprint sensing circuitsSYNAPTICS INC·Filed 2013·Granted Aug 11, 2015·0 cites·29 claims
Showing the top 50 of 58 patent records by PatentIndex Score.
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