Takafumi YAMAJI

Person

Kanagawa, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Radio apparatus
- Patent number 9,281,830
- Issue date Mar 8, 2016
- Kabushiki Kaisha Toshiba
- Shoji Otaka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Fractional frequency dividing circuit and transmitter
- Patent number 9,099,959
- Issue date Aug 4, 2015
- Kabushiki Kaisha Toshiba
- Takafumi Yamaji
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Semiconductor device and receiver
- Patent number 8,994,436
- Issue date Mar 31, 2015
- Kabushiki Kaisha Toshiba
- Takafumi Yamaji
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Radio apparatus
- Patent number 8,958,767
- Issue date Feb 17, 2015
- Kabushiki Kaisha Toshiba
- Shoji Otaka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Time error estimating device, error correction device and A/D conve...
- Patent number 8,659,454
- Issue date Feb 25, 2014
- Kabushiki Kaisha Toshiba
- Tomohiko Sugimoto
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Analogue to digital converter and signal processing system
- Patent number 8,502,712
- Issue date Aug 6, 2013
- Kabushiki Kaisha Toshiba
- Naoya Waki
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
A/D converting apparatus
- Patent number 7,884,749
- Issue date Feb 8, 2011
- Kabushiki Kaisha Toshiba
- Masanori Furuta
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Digital/analog converter and transmitter for complex signals
- Patent number 7,710,301
- Issue date May 4, 2010
- Kabushiki Kaisha Toshiba
- Takeshi Ueno
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
AD converter and radio receiver
- Patent number 7,532,144
- Issue date May 12, 2009
- Kabushiki Kaisha Toshiba
- Takafumi Yamaji
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
A/D converter, signal processor, and receiving device
- Patent number 7,522,080
- Issue date Apr 21, 2009
- Kabushiki Kaisha Toshiba
- Takafumi Yamaji
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
D/A converter and communication apparatus
- Patent number 7,482,959
- Issue date Jan 27, 2009
- Kabushiki Kaisha Toshiba
- Akihide Sai
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Multiplier and radio communication apparatus using the same
- Patent number 7,471,939
- Issue date Dec 30, 2008
- Kabushiki Kaisha Toshiba
- Takafumi Yamaji
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Parallel controlled connections of the plurality of ring oscillator...
- Patent number 7,449,961
- Issue date Nov 11, 2008
- Kabushiki Kaisha Toshiba
- Akihide Sai
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Amplifier, filter using the same, and radio communication device
- Patent number 7,414,468
- Issue date Aug 19, 2008
- Kabushiki Kaisha Toshiba
- Takafumi Yamaji
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
AD converter and radio receiver
- Patent number 7,379,009
- Issue date May 27, 2008
- Kabushiki Kaisha Toshiba
- Takafumi Yamaji
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
A/D converter, signal processor, and receiving device
- Patent number 7,372,385
- Issue date May 13, 2008
- Kabushiki Kaisha Toshiba
- Takafumi Yamaji
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Variable resolution A/D converter
- Patent number 7,313,380
- Issue date Dec 25, 2007
- Kabushiki Kaisha Toshiba
- Takafumi Yamaji
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Multiple input analog-to-digital conversion apparatus and radio rec...
- Patent number 7,250,895
- Issue date Jul 31, 2007
- Kabushiki Kaisha Toshiba
- Daisuke Kurose
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Multiple input analog-to-digital conversion apparatus and radio rec...
- Patent number 7,236,118
- Issue date Jun 26, 2007
- Kabushiki Kaisha Toshiba
- Daisuke Kurose
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Multiple input analog-to-digital conversion apparatus and radio rec...
- Patent number 7,088,278
- Issue date Aug 8, 2006
- Kabushiki Kaisha Toshiba
- Daisuke Kurose
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Variable gain amplifier device
- Patent number 7,065,334
- Issue date Jun 20, 2006
- Kabushiki Kaisha Toshiba
- Shoji Otaka
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Frequency converter, orthogonal demodulator and orthogonal modulator
- Patent number 7,057,426
- Issue date Jun 6, 2006
- Kabushiki Kaisha Toshiba
- Takafumi Yamaji
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Operational amplifier circuit, sample/hold circuit and filter circu...
- Patent number 7,053,703
- Issue date May 30, 2006
- Kabushiki Kaisha Toshiba
- Tetsuro Itakura
- G11 - INFORMATION STORAGE
Information Patent Grant
Operational amplifier circuit, sample/hold circuit and filter circu...
- Patent number 7,038,537
- Issue date May 2, 2006
- Kabushiki Kaisha Toshiba
- Tetsuro Itakura
- G11 - INFORMATION STORAGE
Information Patent Grant
Variable gain amplifier device
- Patent number 7,031,684
- Issue date Apr 18, 2006
- Kabushiki Kaisha Toshiba
- Shoji Otaka
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Operational amplifier circuit, sample/hold circuit and filter circu...
- Patent number 7,009,448
- Issue date Mar 7, 2006
- Kabushiki Kaisha Toshiba
- Tetsuro Itakura
- G11 - INFORMATION STORAGE
Information Patent Grant
Exponential conversion circuit and variable gain circuit
- Patent number 6,930,532
- Issue date Aug 16, 2005
- Kabushiki Kaisha Toshiba
- Nobuo Kanou
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Exponential conversion circuit and variable gain circuit
- Patent number 6,777,999
- Issue date Aug 17, 2004
- Kabushiki Kaisha Toshiba
- Nobuo Kanou
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Frequency converter, orthogonal demodulator and orthogonal modulator
- Patent number 6,774,739
- Issue date Aug 10, 2004
- Kabushiki Kaisha Toshiba
- Takafumi Yamaji
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Variable gain amplifier
- Patent number 6,577,188
- Issue date Jun 10, 2003
- Kabushiki Kaisha Toshiba
- Takashi Ueno
- H03 - BASIC ELECTRONIC CIRCUITRY

Patents Applicationslast 30 patents

Information Patent Application
FRACTIONAL FREQUENCY DIVIDING CIRCUIT AND TRANSMITTER
- Publication number 20150055726
- Publication date Feb 26, 2015
- Kabushiki Kaisha Toshiba
- Takafumi Yamaji
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
SEMICONDUCTOR DEVICE AND RECEIVER
- Publication number 20140043088
- Publication date Feb 13, 2014
- Takafumi YAMAJI
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
TIME ERROR ESTIMATING DEVICE, ERROR CORRECTION DEVICE AND A/D CONVE...
- Publication number 20130076545
- Publication date Mar 28, 2013
- Kabushiki Kaisha Toshiba
- Tomohiko Sugimoto
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
ANALOGUE TO DIGITAL CONVERTER AND SIGNAL PROCESSING SYSTEM
- Publication number 20130076544
- Publication date Mar 28, 2013
- Kabushiki Kaisha Toshiba
- Naoya Waki
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
RADIO APPARATUS
- Publication number 20120214434
- Publication date Aug 23, 2012
- Kabushiki Kaisha Toshiba
- Shoji OTAKA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
RADIO APPARATUS
- Publication number 20120208483
- Publication date Aug 16, 2012
- Kabushiki Kaisha Toshiba
- Shoji OTAKA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
RECEIVER
- Publication number 20100233986
- Publication date Sep 16, 2010
- Kabushiki Kaisha Toshiba
- Takafumi Yamaji
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
COMMUNICATION DEVICE AND COMMUNICATION METHOD
- Publication number 20100151800
- Publication date Jun 17, 2010
- Kabushiki Kaisha Toshiba
- Ippei Akita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
SIGNAL PROCESSING CIRCUIT AND RECEIVER USING THE SAME
- Publication number 20100150270
- Publication date Jun 17, 2010
- Kabushiki Kaisha Toshiba
- Masanori Furuta
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
FREQUENCY CONVERTING CIRCUIT AND RECEIVER
- Publication number 20100112971
- Publication date May 6, 2010
- Kabushiki Kaisha Toshiba
- Junya Matsuno
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
SAMPLE RATE CONVERTER AND RCEIVER USING THE SAME
- Publication number 20090245437
- Publication date Oct 1, 2009
- Kabushiki Kaisha Toshiba
- Masanori Furuta
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
TRANSMITTER USING CARTESIAN LOOP
- Publication number 20090245418
- Publication date Oct 1, 2009
- Kabushiki Kaisha Toshiba
- Takafumi Yamaji
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
SAMPLE RATE CONVERTER AND RECEIVER USING THE SAME
- Publication number 20090245429
- Publication date Oct 1, 2009
- Kabushiki Kaisha Toshiba
- Masanori Furuta
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
A/D CONVERTING APPARATUS
- Publication number 20090184857
- Publication date Jul 23, 2009
- Kabushiki Kaisha Toshiba
- Masanori Furuta
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
SAMPLE RATE CONVERTER
- Publication number 20090079598
- Publication date Mar 26, 2009
- Kabushiki Kaisha Toshiba
- Masanori Furuta
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
OSCILLATOR, PLL OSCILLATOR, RADIO APPARATUS
- Publication number 20090033427
- Publication date Feb 5, 2009
- Kabushiki Kaisha Toshiba
- Akihide Sai
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
MULTI-INPUT MULTI-OUTPUT AMPLIFIER, AN ACTIVE INDUCTOR, A FILTER AN...
- Publication number 20080309436
- Publication date Dec 18, 2008
- Kabushiki Kaisha Toshiba
- Takafumi Yamaji
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
DIGITAL/ANALOG CONVERTER AND TRANSMITTER
- Publication number 20080291070
- Publication date Nov 27, 2008
- Kabushiki Kaisha Toshiba
- Takeshi Ueno
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
AMPLIFIER, FILTER USING THE SAME, AND RADIO COMMUNICATION DEVICE
- Publication number 20080274714
- Publication date Nov 6, 2008
- Kabushiki Kaisha Toshiba
- Takafumi Yamaji
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Frequency converter and radio receiver using the same
- Publication number 20080242253
- Publication date Oct 2, 2008
- Kabushiki Kaisha Toshiba
- Takafumi Yamaji
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
AD CONVERTER AND RADIO RECEIVER
- Publication number 20080204298
- Publication date Aug 28, 2008
- Kabushiki Kaisha Toshiba
- Takafumi Yamaji
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
A/D CONVERTER, SIGNAL PROCESSOR, AND RECEIVING DEVICE
- Publication number 20080180297
- Publication date Jul 31, 2008
- Kabushiki Kaisha Toshiba
- Takafumi Yamaji
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
AMPLIFIER, FILTER USING THE SAME, AND RADIO COMMUNICATION DEVICE
- Publication number 20080064359
- Publication date Mar 13, 2008
- Kabushiki Kaisha Toshiba
- Takafumi Yamaji
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
A/D CONVERTER, SIGNAL PROCESSOR, AND RECEIVING DEVICE
- Publication number 20080001803
- Publication date Jan 3, 2008
- Kabushiki Kaisha Toshiba
- Takafumi Yamaji
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
DIGITAL/ANALOG CONVERTER AND TRANSMITTER
- Publication number 20070279269
- Publication date Dec 6, 2007
- KABUSHIKI KAISHA TOSHIBA
- Takeshi Ueno
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Variable resolution A/D converter
- Publication number 20070210951
- Publication date Sep 13, 2007
- Kabushiki Kaisha Toshiba
- Takafumi Yamaji
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
AD CONVERTER AND RADIO RECEIVER
- Publication number 20070194971
- Publication date Aug 23, 2007
- Kabushiki Kaisha Toshiba
- Takafumi Yamaji
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
OSCILLATOR, PLL OSCILLATOR, RADIO APPARATUS
- Publication number 20070182493
- Publication date Aug 9, 2007
- Kabushiki Kaisha Toshiba
- Akihide Sai
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Multiplier and radio communication apparatus using the same
- Publication number 20070026835
- Publication date Feb 1, 2007
- KABUSHIKI KAISHA TOSHIBA
- Takafumi Yamaji
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Amplifier, filter using the same, and radio communication device
- Publication number 20070024359
- Publication date Feb 1, 2007
- KABUSHIKI KAISHA TOSHIBA
- Takafumi Yamaji
- H03 - BASIC ELECTRONIC CIRCUITRY

Takafumi YAMAJI

Person

Patents Grantslast 30 patents

Radio apparatus

Fractional frequency dividing circuit and transmitter

Semiconductor device and receiver

Radio apparatus

Time error estimating device, error correction device and A/D conve...

Analogue to digital converter and signal processing system

A/D converting apparatus

Digital/analog converter and transmitter for complex signals

AD converter and radio receiver

A/D converter, signal processor, and receiving device

D/A converter and communication apparatus

Multiplier and radio communication apparatus using the same

Parallel controlled connections of the plurality of ring oscillator...

Amplifier, filter using the same, and radio communication device

AD converter and radio receiver

A/D converter, signal processor, and receiving device

Variable resolution A/D converter

Multiple input analog-to-digital conversion apparatus and radio rec...

Multiple input analog-to-digital conversion apparatus and radio rec...

Multiple input analog-to-digital conversion apparatus and radio rec...

Variable gain amplifier device

Frequency converter, orthogonal demodulator and orthogonal modulator

Operational amplifier circuit, sample/hold circuit and filter circu...

Operational amplifier circuit, sample/hold circuit and filter circu...

Variable gain amplifier device

Operational amplifier circuit, sample/hold circuit and filter circu...

Exponential conversion circuit and variable gain circuit

Exponential conversion circuit and variable gain circuit

Frequency converter, orthogonal demodulator and orthogonal modulator

Variable gain amplifier

Patents Applicationslast 30 patents

FRACTIONAL FREQUENCY DIVIDING CIRCUIT AND TRANSMITTER

SEMICONDUCTOR DEVICE AND RECEIVER

TIME ERROR ESTIMATING DEVICE, ERROR CORRECTION DEVICE AND A/D CONVE...

ANALOGUE TO DIGITAL CONVERTER AND SIGNAL PROCESSING SYSTEM

RADIO APPARATUS

RADIO APPARATUS

RECEIVER

COMMUNICATION DEVICE AND COMMUNICATION METHOD

SIGNAL PROCESSING CIRCUIT AND RECEIVER USING THE SAME

FREQUENCY CONVERTING CIRCUIT AND RECEIVER

SAMPLE RATE CONVERTER AND RCEIVER USING THE SAME

TRANSMITTER USING CARTESIAN LOOP

SAMPLE RATE CONVERTER AND RECEIVER USING THE SAME

A/D CONVERTING APPARATUS

SAMPLE RATE CONVERTER

OSCILLATOR, PLL OSCILLATOR, RADIO APPARATUS

MULTI-INPUT MULTI-OUTPUT AMPLIFIER, AN ACTIVE INDUCTOR, A FILTER AN...

DIGITAL/ANALOG CONVERTER AND TRANSMITTER

AMPLIFIER, FILTER USING THE SAME, AND RADIO COMMUNICATION DEVICE

Frequency converter and radio receiver using the same

AD CONVERTER AND RADIO RECEIVER

A/D CONVERTER, SIGNAL PROCESSOR, AND RECEIVING DEVICE

AMPLIFIER, FILTER USING THE SAME, AND RADIO COMMUNICATION DEVICE

A/D CONVERTER, SIGNAL PROCESSOR, AND RECEIVING DEVICE

DIGITAL/ANALOG CONVERTER AND TRANSMITTER

Variable resolution A/D converter

AD CONVERTER AND RADIO RECEIVER

OSCILLATOR, PLL OSCILLATOR, RADIO APPARATUS

Multiplier and radio communication apparatus using the same

Amplifier, filter using the same, and radio communication device