Inventor · disambiguated record
Heiji Ikoma
Also filed as: IKOMA HEIJI
25 granted patents·3 pending applications·458 citations·filing 1996–2021
96Inventor score
Files withMATSUSHITA ELECTRIC INDUSTRIAL CO LTD11PANASONIC CORP11IKOMA HEIJI3OGAWA TOMOHIRO1SOCIONEXT INC1
Top patents by PatentIndex Score
28 records- 0190US6479930B1Dispersion-type electroluminescence elementMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1999·Granted Nov 12, 2002·92 cites·22 claims
- 0289US7796073B2Current switch circuit and D/A converter, semiconductor integrated circuit, and communication device using the samePANASONIC CORP·Filed 2007·Granted Sep 14, 2010·15 cites·15 claims
- 0386US6734817B2A/D converter, method of A/D conversion, and signal processing deviceMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2002·Granted May 11, 2004·46 cites·6 claims
- 0483US8081099B2D/A converter, differential switch, semiconductor integrated circuit, video apparatus, and communication apparatusIKOMA HEIJI·Filed 2008·Granted Dec 20, 2011·16 cites·30 claims
- 0581US6310492B1CMOS semiconductor integrated circuitMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Oct 30, 2001·25 cites·20 claims
- 0680US7019676B2D/A converterMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2004·Granted Mar 28, 2006·25 cites·19 claims
- 0779US8217817B2Current switch circuit and D/A converter, semiconductor integrated circuit, and communication device using the sameOGAWA TOMOHIRO·Filed 2010·Granted Jul 10, 2012·5 cites·12 claims
- 0877US6590516B2Current steering type D/A converterMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2002·Granted Jul 8, 2003·25 cites·6 claims
- 0976US5841230AElectroluminescent lighting element with a light-permeable reflection layer and manufacturing method for the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1997·Granted Nov 24, 1998·39 cites·12 claims
- 1073US7764211B2Current steering DACPANASONIC CORP·Filed 2007·Granted Jul 27, 2010·8 cites·20 claims
- 1171US6791391B2Level shifting circuitMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2002·Granted Sep 14, 2004·16 cites·2 claims
- 1265US6010742AElectroluminescent lighting element, manufacturing method of the same, and an illuminated switch unit using the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1997·Granted Jan 4, 2000·72 cites·3 claims
- 1364US7701373B2Current steering DACPANASONIC CORP·Filed 2006·Granted Apr 20, 2010·6 cites·10 claims
- 1463US7825843B2D/A converter and semiconductor integrated circuit including the samePANASONIC CORP·Filed 2005·Granted Nov 2, 2010·4 cites·17 claims
- 1561US6492849B2Supply voltage detection circuitMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted Dec 10, 2002·12 cites·9 claims
- 1659US7924199B2Current steering DACPANASONIC CORP·Filed 2010·Granted Apr 12, 2011·2 cites·20 claims
- 1754US5844362AElectroluminescent light element having a transparent electrode formed by a paste material which provides uniform illuminationMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1996·Granted Dec 1, 1998·43 cites·6 claims
- 1849US8564362B2Filter circuit, semiconductor integrated circuit, communication apparatus, semiconductor device, and systemPANASONIC CORP·Filed 2013·Granted Oct 22, 2013·0 cites·18 claims
- 1947US7973687B2Differential switch, D/A converter, semiconductor integrated circuit and communication apparatusPANASONIC CORP·Filed 2009·Granted Jul 5, 2011·1 cites·7 claims
- 2047US7924188B2Rapid recovery circuitPANASONIC CORP·Filed 2008·Granted Apr 12, 2011·1 cites·31 claims
- 2147US7042278B2Voltage reference circuit with reduced power consumptionMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2004·Granted May 9, 2006·5 cites·6 claims
- 2242US7982644B2D/A converter and semiconductor integrated circuit including the samePANASONIC CORP·Filed 2010·Granted Jul 19, 2011·0 cites·6 claims
- 2340US8395442B2Filter circuit, transmission filter circuit, semiconductor integrated circuit, communication apparatus, and timing adjustment method for filter circuitTOKUMARU MICHIKO·Filed 2011·Granted Mar 12, 2013·0 cites·22 claims
- 2437US8476973B2Switch device and layout design method for switch deviceIKOMA HEIJI·Filed 2012·Granted Jul 2, 2013·0 cites·17 claims
- 2534US2014104088A1Differential switch drive circuit and current steering digital-to-analog converterPANASONIC CORP·Filed 2013·Application pending·0 cites
- 2632US2009208179A1Analog video signal generation circuit, analog composite video signal generation method, analog signal synthesizing circuit, analog signal synthesizing method, semiconductor integrated circuit, and video equipmentIKOMA HEIJI·Filed 2007·Application pending·0 cites
- 2732US2011037511A1Multiple signal switching circuit, current switching cell circuit, latch circuit, current steering type dac, semiconductor integrated circuit, video device, and communication devicePANASONIC CORP·Filed 2010·Application pending·0 cites
- 2831US11206028B2Voltage-controlled oscillator and PLL circuit in which same is usedSOCIONEXT INC·Filed 2021·Granted Dec 21, 2021·0 cites·15 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →