Amplifiers – With amplifier condition indicating or testing means
Patent
1998-02-05
1999-11-02
Pascal, Robert
Amplifiers
With amplifier condition indicating or testing means
330277, 327325, G01R 1900, H03F 316, H03K 508
Patent
active
059778237
ABSTRACT:
A semiconductor amplifier circuit receiving a high frequency signal and amplifying and outputting the signal includes a transistor for receiving the high frequency signal; and a waveform control connected to an input terminal of the transistor and controlling a negative value of the high frequency signal to be less than the gate breakdown voltage of the transistor and not below a negative threshold voltage. Therefore, a low distortion characteristic is available even when a transistor with a large magnitude of the gate breakdown voltage is manufactured. As a result, accuracy in controlling the value of the gate breakdown voltage during manufacturing is not required to be as high as in conventional manufacturing, resulting in a lower processing cost as well as improved yield.
REFERENCES:
patent: 3911293 (1975-10-01), Shafer
patent: 4683443 (1987-07-01), Young et al.
patent: 4990973 (1991-02-01), Ishikawa et al.
patent: 5050235 (1991-09-01), Kojima
patent: 5430409 (1995-07-01), Buck et al.
Gotou Seiki
Inoue Akira
Mitsubishi Denki & Kabushiki Kaisha
Nguyen Patricia T.
Pascal Robert
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