Faculty Information - Yamaji Takafumi

Yamaji Takafumi

Department / Course FACULTY OF COMPUTER AND INFORMATIONSCIENCES Department of Computer and Information Sciences

Job

Acquisition patent
1.	2016/03/08	Radio apparatus （USP 9,281,830）
2.	2015/08/04	Fractional frequency dividing circuit and transmitter （USP 9,099,959）
3.	2015/03/31	Semiconductor device and receiver （USP 8,994,436）
4.	2015/02/15	Radio apparatus （USP 8,958,767）
5.	2014/02/25	Time error estimating device, error correction device and A/D converter （USP 8,659,454）
6.	2013/08/06	Analogue to digital converter and signal processing system （USP 8,502,712）
7.	2011/02/08	A/D converting apparatus （USP 7,884,749）
8.	2010/05/04	Digital/analog converter and transmitter for complex signals （USP 7,710,301）
9.	2009/05/12	AD converter and radio receiver （USP 7,532,144）
10.	2009/04/21	A/D converter, signal processor, and receiving device （USP 7,522,080）
11.	2009/01/27	D/A converter and communication apparatus （USP 7,482,959）
12.	2008/12/30	Multiplier and radio communication apparatus using the same （USP 7,471,939）
13.	2008/11/11	Parallel controlled connections of the plurality of ring oscillator units, PLL, radio apparatus （USP 7,449,961）
14.	2008/08/19	Amplifier, filter using the same, and radio communication device （USP 7,414,468）
15.	2008/05/27	AD converter and radio receiver （USP 7,379,009）
16.	2008/05/13	A/D converter, signal processor, and receiving device （USP 7,372,385）
17.	2007/12/25	Variable resolution A/D converter （USP 7,313,380）
18.	2007/07/31	Multiple input analog-to-digital conversion apparatus and radio receiver using the same （USP 7,250,895）
19.	2007/01/26	Multiple input analog-to-digital conversion apparatus and radio receiver using the same （USP 7,236,118）
20.	2006/08/08	Multiple input analog-to-digital conversion apparatus and radio receiver using the same （USP 7,088,278）
21.	2006/06/20	Variable gain amplifier device （USP 7,065,334）
22.	2006/06/06	Frequency converter, orthogonal demodulator and orthogonal modulator （USP 7,057,426）
23.	2006/05/30	Operational amplifier circuit, sample/hold circuit and filter circuit using the operational amplifier circuit （USP 7,053,703）
24.	2006/05/02	Operational amplifier circuit, sample/hold circuit and filter circuit using the operational amplifier circuit （USP 7,038,537）
25.	2006/04/18	Variable gain amplifier device （USP 7,031,684）
26.	2006/03/07	Operational amplifier circuit, sample/hold circuit and filter circuit using the operational amplifier circuit （USP 7,009,448）
27.	2005/08/16	Exponential conversion circuit and variable gain circuit （USP 6,930,532）
28.	2004/08/17	Exponential conversion circuit and variable gain circuit （USP 6,777,999）
29.	2004/08/10	Frequency converter, orthogonal demodulator and orthogonal modulator （USP 6,774,739）
30.	2003/06/10	Variable gain amplifier （USP 6,577,188）
31.	2002/12/24	Receiver having DC offset decreasing function and communication system using the same （USP 6,498,929）
32.	2002/11/05	Frequency converter （USP 6,477,360）
33.	2002/08/20	Variable gain amplifier （USP 6,437,643）
34.	2002/04/30	Frequency converter （USP 6,381,449）
35.	2001/06/19	Active array antenna system （USP 6,249,249）
36.	2000/05/02	Phase shifter （USP 6,057,723）
37.	1999/11/30	Frequency converter and radio receiver using same （USP 5,995,819）
38.	1999/02/02	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 （USP 5,867,777）
39.	1998/11/24	A/D converter apparatus with frequency conversion function and radio apparatus using the same （USP 5,841,388）