Amplifiers – With semiconductor amplifying device – Including gain control means
Patent
1995-03-20
1996-10-29
Mottola, Steven
Amplifiers
With semiconductor amplifying device
Including gain control means
330283, H03G 312
Patent
active
055700640
ABSTRACT:
An AGC amplifier used in a radio transmitter-receiver such as an portable telephone, in which a transistor for amplification is connected in series to a transistor for buffer as in direct current, and a third transistor is connected to the transistor for amplification, or to the transistor for amplification and the transistor for buffer to vary a feed-back quantity by varying a bias at a base or gate of the third transistor so as to vary a gain, thereby preventing a saturation characteristics of the circuit current from changing even In a change of the gain of the amplifier.
REFERENCES:
patent: 5319318 (1994-06-01), Kunihisa et al.
Fujitsu Limited
Mottola Steven
LandOfFree
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