Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1997-11-26
2000-07-11
Pascal, Robert
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330254, 359180, H03F 345, H04B 1004
Patent
active
060878991
ABSTRACT:
A semiconductor integrated circuit has a first load device and a first switching device connected in series between a first power supply line and a second power supply line, and an input signal is supplied to the control terminal of the first switching device. The semiconductor integrated circuit has a first switch unit and a first load unit. The first switch unit is connected between the first load device and the first power supply line, and is supplied with a first control signal at its control terminal. The first load unit is connected to the control terminal of the first switch unit, and its impedance is set at or varied to an arbitrary value. The band, gain, and output voltage of the circuit are controlled by the first control signal and the impedance of the first load unit. With this configuration, the gain and band (operating frequency band) of an amplifier constructed from an FET can be increased.
REFERENCES:
patent: 5586146 (1996-12-01), Fang et al.
patent: 5630228 (1997-05-01), Mittel
patent: 5877643 (1999-05-01), Drogi
patent: 6023192 (2000-02-01), Didier
Fujitsu Limited
Nguyen Patricia T.
Pascal Robert
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