Amplifiers – With semiconductor amplifying device – Including push-pull amplifier
Patent
1996-11-20
1998-06-02
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including push-pull amplifier
330265, H03F 330
Patent
active
057606498
ABSTRACT:
According to the preferred embodiment, a buffer amplifier is provided that provides improved linearity while providing increased control over the gain without unduly limiting the amplifier frequency response. The amplifier preferably includes a series pair of transistors with their gates connected to the amplifier input and their drains connected to the amplifier output. The amplifier further includes a pair of feedback transistors connected in series with the series pair. The gates of the feedback transistors are connected to the amplifier output through a pair of feedback networks. Each network includes at least one impedance element. The impedance elements are preferably selected to maximize the linearity of the amplifier response. Furthermore, the impedance elements can be selected to modify the gain of the amplifier, increasing the amplifier gain if needed.
REFERENCES:
patent: 3914702 (1975-10-01), Gehweiler
patent: 4021747 (1977-05-01), Todokoro
patent: 5113150 (1992-05-01), Waizman
patent: 5341046 (1994-08-01), Crafts
patent: 5343166 (1994-08-01), Pass
Michail Michel Salib
Pricer Wilbur David
International Business Machines - Corporation
Mullins James B.
Shkurko Eugene I.
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