Shigeru Kagawa

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Gain-variable amplifier with wide control range
- Patent number 5,914,637
- Issue date Jun 22, 1999
- NEC Corporation
- Shigeru Kagawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Quadrature demodulator having active filters formed with emitter fo...
- Patent number 5,734,295
- Issue date Mar 31, 1998
- NEC Corporation
- Shigeru Kagawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Amplifier circuit having nagative feedback loop for self-bias
- Patent number 5,594,387
- Issue date Jan 14, 1997
- NEC Corporation
- Shigeru Kagawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Stereo demodulation device
- Patent number 4,751,735
- Issue date Jun 14, 1988
- NEC Corporation
- Shigeru Kagawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE