Akinobu Kawamura

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Kyoto, JP

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Patents Grantslast 30 patents

Information Patent Grant
Audio signal amplifier circuit
- Patent number 8,654,991
- Issue date Feb 18, 2014
- Rohm Co., Ltd.
- Katsuyuki Ono
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Variable-order delta sigma modulator and DA converter
- Patent number 7,129,873
- Issue date Oct 31, 2006
- Rohm Co., Ltd.
- Akinobu Kawamura
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Variable-order delta sigma modulator and DA converter
- Patent number 6,839,012
- Issue date Jan 4, 2005
- Rohm Co., Ltd.
- Akinobu Kawamura
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Semiconductor integrated circuit device having an output voltage se...
- Patent number 6,359,428
- Issue date Mar 19, 2002
- Rohm Co. Ltd.
- Akinobu Kawamura
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Magnetic recording and reproducing apparatus having a high-speed ch...
- Patent number 5,650,884
- Issue date Jul 22, 1997
- Rohm Co., Ltd.
- Hiroyuki Sasaki
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
AUDIO SIGNAL AMPLIFIER CIRCUIT
- Publication number 20110158435
- Publication date Jun 30, 2011
- Rohm Co., Ltd.
- Katsuyuki ONO
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
APPARATUS AND METHOD FOR CONTROLLING VOLUME
- Publication number 20080253585
- Publication date Oct 16, 2008
- Rohm Co., Ltd.
- Akinobu Kawamura
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Variable-order delta sigma modulator and DA converter
- Publication number 20050088328
- Publication date Apr 28, 2005
- ROHM CO., LTD.
- Akinobu Kawamura
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Variable-order delta sigma modulator and DA converter
- Publication number 20040036640
- Publication date Feb 26, 2004
- ROHM CO., LTD.
- Akinobu Kawamura
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Audio amplifier circuit with digital audio interface and codec devi...
- Publication number 20020177915
- Publication date Nov 28, 2002
- Akinobu Kawamura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE