Takeshi Doi

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Kokubunji, JP

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Patents Grantslast 30 patents

Information Patent Grant
Variable gain amplifier circuit and gain control method thereof
- Patent number 7,005,922
- Issue date Feb 28, 2006
- Hitachi, Ltd.
- Takashi Oshima
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Variable gain amplifier
- Patent number 6,734,730
- Issue date May 11, 2004
- Hitachi, Ltd.
- Takeshi Doi
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Automatic gain adjustment circuit and amplifier using the same
- Patent number 6,717,471
- Issue date Apr 6, 2004
- Hitachi, Ltd.
- Satoshi Arayashiki
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Photo semiconductor integrated circuit device and optical recording...
- Patent number 6,573,578
- Issue date Jun 3, 2003
- Hitachi, Ltd.
- Shigeharu Kimura
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Variable gain amplifier circuit and gain control method thereof
- Publication number 20040229586
- Publication date Nov 18, 2004
- Takashi Oshima
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Variable gain amplifier
- Publication number 20030155973
- Publication date Aug 21, 2003
- Hitachi, Ltd.
- Takeshi Doi
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Automatic gain adjustment circuit and amplifier using the same
- Publication number 20030151461
- Publication date Aug 14, 2003
- Hitachi, Ltd.
- Satoshi Arayashiki
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Photo semiconductor integrated circuit device and optical recording...
- Publication number 20020070417
- Publication date Jun 13, 2002
- Shigeharu Kimura
- H01 - BASIC ELECTRIC ELEMENTS