Inventor
YAMAJI TAKAFUMI
JP49 patents
⚠️ This page may combine multiple inventors who share the name “YAMAJI TAKAFUMI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
TOSHIBA KK
40 patentsUS6498929B1Dec 24, 2002
Receiver having DC offset decreasing function and communication system using the same
TOSHIBA KK149 citations98
US5634207AMay 27, 1997
Frequency converter capable of reducing noise components in local oscillation signals
TOSHIBA KK130 citations98
US6249249B1Jun 19, 2001
Active array antenna system
TOSHIBA KK70 citations96
US6057723AMay 2, 2000
Phase shifter
TOSHIBA KK69 citations96
US5995819ANov 30, 1999
Frequency converter and radio receiver using same
TOSHIBA KK85 citations96
US5867777AFeb 2, 1999
Variable-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 amplifier
TOSHIBA KK59 citations96
US5841388ANov 24, 1998
A/D converter apparatus with frequency conversion function and radio apparatus using the same
TOSHIBA KK65 citations96
US5767750AJun 16, 1998
Modulator
TOSHIBA KK91 citations96
US5534827AJul 9, 1996
Modulator
TOSHIBA KK53 citations96
US7313380B2Dec 25, 2007
Variable resolution A/D converter
TOSHIBA KK28 citations93
US7065334B1Jun 20, 2006
Variable gain amplifier device
TOSHIBA KK24 citations93
US6577188B2Jun 10, 2003
Variable gain amplifier
TOSHIBA KK17 citations93
US6381449B1Apr 30, 2002
Frequency converter
TOSHIBA KK25 citations93
US7250895B2Jul 31, 2007
Multiple input analog-to-digital conversion apparatus and radio receiver using the same
TOSHIBA KK14 citations92
US7088278B2Aug 8, 2006
Multiple input analog-to-digital conversion apparatus and radio receiver using the same
TOSHIBA KK24 citations92
US6777999B2Aug 17, 2004
Exponential conversion circuit and variable gain circuit
TOSHIBA KK36 citations91
US5311086AMay 10, 1994
Multiplying circuit with improved linearity and reduced leakage
TOSHIBA KK21 citations88
US7884749B2Feb 8, 2011
A/D converting apparatus
TOSHIBA KK8 citations84
US7449961B2Nov 11, 2008
Parallel controlled connections of the plurality of ring oscillator units, PLL, radio apparatus
TOSHIBA KK18 citations84
US7236118B2Jun 26, 2007
Multiple input analog-to-digital conversion apparatus and radio receiver using the same
TOSHIBA KK10 citations84
US6477360B1Nov 5, 2002
Frequency converter
TOSHIBA KK15 citations84
US6437643B1Aug 20, 2002
Variable gain amplifier
TOSHIBA KK14 citations84
US7532144B2May 12, 2009
AD converter and radio receiver
TOSHIBA KK7 citations74
US7057426B2Jun 6, 2006
Frequency converter, orthogonal demodulator and orthogonal modulator
TOSHIBA KK7 citations74
US5714916AFeb 3, 1998
Modulator
TOSHIBA KK9 citations74
US7414468B2Aug 19, 2008
Amplifier, filter using the same, and radio communication device
TOSHIBA KK8 citations73
US9099959B2Aug 4, 2015
Fractional frequency dividing circuit and transmitter
TOSHIBA KK3 citations63
US7710301B2May 4, 2010
Digital/analog converter and transmitter for complex signals
TOSHIBA KK2 citations63
US7379009B2May 27, 2008
AD converter and radio receiver
TOSHIBA KK2 citations63
US7372385B2May 13, 2008
A/D converter, signal processor, and receiving device
TOSHIBA KK4 citations63
US7031684B2Apr 18, 2006
Variable gain amplifier device
TOSHIBA KK3 citations63
US7009448B2Mar 7, 2006
Operational amplifier circuit, sample/hold circuit and filter circuit using the operational amplifier circuit
TOSHIBA KK3 citations63
US6774739B2Aug 10, 2004
Frequency converter, orthogonal demodulator and orthogonal modulator
TOSHIBA KK2 citations63
US7471939B2Dec 30, 2008
Multiplier and radio communication apparatus using the same
TOSHIBA KK2 citations62
US6930532B2Aug 16, 2005
Exponential conversion circuit and variable gain circuit
TOSHIBA KK4 citations61
US7522080B2Apr 21, 2009
A/D converter, signal processor, and receiving device
TOSHIBA KK1 citations52
US7482959B2Jan 27, 2009
D/A converter and communication apparatus
TOSHIBA KK0 citations52
US7053703B2May 30, 2006
Operational amplifier circuit, sample/hold circuit and filter circuit using the operational amplifier circuit
TOSHIBA KK0 citations52
US7038537B2May 2, 2006
Operational amplifier circuit, sample/hold circuit and filter circuit using the operational amplifier circuit
TOSHIBA KK0 citations52
US8994436B2Mar 31, 2015
Semiconductor device and receiver
TOSHIBA KK0 citations51
NIPPON KOKAN KK
4 patentsUS6562474B1May 13, 2003
Coated steel sheet having excellent corrosion resistance and method for producing the same
NIPPON KOKAN KK97 citations97
US6677053B2Jan 13, 2004
Surface-treated steel sheet and production method therefor
NIPPON KOKAN KK22 citations92
US6610422B1Aug 26, 2003
Coated steel sheet and method for manufacturing the same
NIPPON KOKAN KK52 citations91
US5221490AJun 22, 1993
Rust-preventive lubricant composition for zinc-plated steel material
NIPPON KOKAN KK14 citations70