Inventor · disambiguated record
Takafumi Yamaji
Also filed as: YAMAJI TAKAFUMI
49 granted patents·16 pending applications·1,280 citations·filing 1992–2014
98Inventor score
Top patents by PatentIndex Score
65 records- 0195US6562474B1Coated steel sheet having excellent corrosion resistance and method for producing the sameNIPPON KOKAN KK·Filed 2000·Granted May 13, 2003·97 cites·12 claims
- 0294US6498929B1Receiver having DC offset decreasing function and communication system using the sameTOSHIBA KK·Filed 1997·Granted Dec 24, 2002·149 cites·55 claims
- 0393US7065334B1Variable gain amplifier deviceTOSHIBA KK·Filed 2006·Granted Jun 20, 2006·24 cites·1 claims
- 0492US7088278B2Multiple input analog-to-digital conversion apparatus and radio receiver using the sameTOSHIBA KK·Filed 2005·Granted Aug 8, 2006·24 cites·10 claims
- 0591US6057723APhase shifterTOSHIBA KK·Filed 1998·Granted May 2, 2000·69 cites·1 claims
- 0691US5634207AFrequency converter capable of reducing noise components in local oscillation signalsTOSHIBA KK·Filed 1996·Granted May 27, 1997·130 cites·12 claims
- 0790US7449961B2Parallel controlled connections of the plurality of ring oscillator units, PLL, radio apparatusTOSHIBA KK·Filed 2006·Granted Nov 11, 2008·18 cites·13 claims
- 0889US6610422B1Coated steel sheet and method for manufacturing the sameNIPPON KOKAN KK·Filed 2002·Granted Aug 26, 2003·52 cites·32 claims
- 0988US6777999B2Exponential conversion circuit and variable gain circuitTOSHIBA KK·Filed 2001·Granted Aug 17, 2004·36 cites·9 claims
- 1088US5995819AFrequency converter and radio receiver using sameTOSHIBA KK·Filed 1996·Granted Nov 30, 1999·85 cites·18 claims
- 1187US5767750AModulatorTOSHIBA KK·Filed 1995·Granted Jun 16, 1998·91 cites·22 claims
- 1286US7250895B2Multiple input analog-to-digital conversion apparatus and radio receiver using the sameTOSHIBA KK·Filed 2006·Granted Jul 31, 2007·14 cites·8 claims
- 1386US5867777AVariable-gain amplifier circuit, offset control method in variable-gain amplifier circuit, radio receiver with variable-gain amplifier circuit, and radio receiving method in radio receiver with variable-gain amplifierTOSHIBA KK·Filed 1996·Granted Feb 2, 1999·59 cites·10 claims
- 1485US7313380B2Variable resolution A/D converterTOSHIBA KK·Filed 2003·Granted Dec 25, 2007·28 cites·14 claims
- 1584US5841388AA/D converter apparatus with frequency conversion function and radio apparatus using the sameTOSHIBA KK·Filed 1995·Granted Nov 24, 1998·65 cites·12 claims
- 1683US6249249B1Active array antenna systemTOSHIBA KK·Filed 1999·Granted Jun 19, 2001·70 cites·18 claims
- 1782US7236118B2Multiple input analog-to-digital conversion apparatus and radio receiver using the sameTOSHIBA KK·Filed 2006·Granted Jun 26, 2007·10 cites·4 claims
- 1881US6577188B2Variable gain amplifierTOSHIBA KK·Filed 2002·Granted Jun 10, 2003·17 cites·20 claims
- 1980US7414468B2Amplifier, filter using the same, and radio communication deviceTOSHIBA KK·Filed 2007·Granted Aug 19, 2008·8 cites·18 claims
- 2079US8659454B2Time error estimating device, error correction device and A/D converterSUGIMOTO TOMOHIKO·Filed 2012·Granted Feb 25, 2014·9 cites·19 claims
- 2179US6677053B2Surface-treated steel sheet and production method thereforNIPPON KOKAN KK·Filed 2001·Granted Jan 13, 2004·22 cites·44 claims
- 2276US6477360B1Frequency converterTOSHIBA KK·Filed 2000·Granted Nov 5, 2002·15 cites·20 claims
- 2376US6437643B1Variable gain amplifierTOSHIBA KK·Filed 2001·Granted Aug 20, 2002·14 cites·18 claims
- 2475US9099959B2Fractional frequency dividing circuit and transmitterTOSHIBA KK·Filed 2014·Granted Aug 4, 2015·3 cites·19 claims
- 2574US7884749B2A/D converting apparatusTOSHIBA KK·Filed 2009·Granted Feb 8, 2011·8 cites·7 claims
- 2674US7532144B2AD converter and radio receiverTOSHIBA KK·Filed 2008·Granted May 12, 2009·7 cites·17 claims
- 2773US5534827AModulatorTOSHIBA KK·Filed 1993·Granted Jul 9, 1996·53 cites·9 claims
- 2866US6381449B1Frequency converterTOSHIBA KK·Filed 1999·Granted Apr 30, 2002·25 cites·6 claims
- 2965US7710301B2Digital/analog converter and transmitter for complex signalsTOSHIBA KK·Filed 2007·Granted May 4, 2010·2 cites·12 claims
- 3065US7372385B2A/D converter, signal processor, and receiving deviceTOSHIBA KK·Filed 2006·Granted May 13, 2008·4 cites·20 claims
- 3164US7057426B2Frequency converter, orthogonal demodulator and orthogonal modulatorTOSHIBA KK·Filed 2003·Granted Jun 6, 2006·7 cites·6 claims
- 3263US7471939B2Multiplier and radio communication apparatus using the sameTOSHIBA KK·Filed 2006·Granted Dec 30, 2008·2 cites·17 claims
- 3361US7009448B2Operational amplifier circuit, sample/hold circuit and filter circuit using the operational amplifier circuitTOSHIBA KK·Filed 2005·Granted Mar 7, 2006·3 cites·3 claims
- 3459US7842400B2Surface-treated steel sheet and method for manufacturing the sameJFE STEEL CORP·Filed 2004·Granted Nov 30, 2010·3 cites·16 claims
- 3556US5221490ARust-preventive lubricant composition for zinc-plated steel materialNIPPON KOKAN KK·Filed 1992·Granted Jun 22, 1993·14 cites·8 claims
- 3654US7379009B2AD converter and radio receiverTOSHIBA KK·Filed 2007·Granted May 27, 2008·2 cites·19 claims
- 3754US5311086AMultiplying circuit with improved linearity and reduced leakageTOSHIBA KK·Filed 1992·Granted May 10, 1994·21 cites·21 claims
- 3853US6930532B2Exponential conversion circuit and variable gain circuitTOSHIBA KK·Filed 2004·Granted Aug 16, 2005·4 cites·6 claims
- 3952US8994436B2Semiconductor device and receiverTOSHIBA KK·Filed 2013·Granted Mar 31, 2015·0 cites·20 claims
- 4052US7031684B2Variable gain amplifier deviceTOSHIBA KK·Filed 2001·Granted Apr 18, 2006·3 cites·19 claims
- 4151US6774739B2Frequency converter, orthogonal demodulator and orthogonal modulatorTOSHIBA KK·Filed 2002·Granted Aug 10, 2004·2 cites·18 claims
- 4249US7522080B2A/D converter, signal processor, and receiving deviceTOSHIBA KK·Filed 2008·Granted Apr 21, 2009·1 cites·12 claims
- 4349US2010150270A1Signal processing circuit and receiver using the sameTOSHIBA KK·Filed 2009·Application pending·0 cites
- 4448US2009245418A1Transmitter using cartesian loopTOSHIBA KK·Filed 2009·Application pending·0 cites
- 4546US2010151800A1Communication device and communication methodTOSHIBA KK·Filed 2009·Application pending·0 cites
- 4646US2010112971A1Frequency converting circuit and receiverTOSHIBA KK·Filed 2009·Application pending·0 cites
- 4746US2008309436A1Multi-input multi-output amplifier, an active inductor, a filter and a radio communication deviceTOSHIBA KK·Filed 2008·Application pending·0 cites
- 4844US8502712B2Analogue to digital converter and signal processing systemWAKI NAOYA·Filed 2012·Granted Aug 6, 2013·1 cites·20 claims
- 4943US2009033427A1Oscillator, pll oscillator, radio apparatusTOSHIBA KK·Filed 2008·Application pending·0 cites
- 5042US2008274714A1Amplifier, filter using the same, and radio communication deviceTOSHIBA KK·Filed 2008·Application pending·0 cites
Showing the top 50 of 65 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →