Amplifiers – Hum or noise or distortion bucking introduced into signal...
Patent
1998-06-30
2000-04-25
Pascal, Robert
Amplifiers
Hum or noise or distortion bucking introduced into signal...
330284, 333 14, H03F 126, H03G 310, H03G 700
Patent
active
060548959
ABSTRACT:
In an amplifier circuit having an amplifier path, a new pre-distortion arrangement is provided. The amplifier circuit includes a signal source, an intermediate amplifier stage, and a power amplifier stage connected sequentially, in series along the amplifier path. The power amplifier stage includes one or more amplifiers operationally connected in parallel, and one or more pre-correction circuits. Each of the amplifiers subjecting an inputted signal to shifts away from their intended values. Each of the pre-correction circuits is associated with one of the amplifiers and connected between an output of the intermediate amplifier stage and the associated amplifier. Each of the pre-correction circuits pre-distorts the signal input to the associated amplifier to compensate for the distortion caused by the associated amplifier. Also, preferably, pre-correction circuits are associated with, and in series with, each of the amplifier stages for pre-distorting the signal input to the associated amplifier stage to compensate for the distortion shifts of the associated amplifier stage.
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H. Igarashi M. Niwa H. Ashida: "GaAs Fet Power Amplifier for 6 GHz SSB Radio" IEEE Global Telecommunications Conference, vol. 3/3, Nov. 26-29, 1984, pp. 1246-1252, XP002085728, Atlanta, Georgia *p. 1246-1247; figures 1-5*.
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Danielsons David Christopher
Meredith Bruce Russell
Harris Corporation
Nguyen Patricia T.
Pascal Robert
LandOfFree
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