Amplifiers – With amplifier bypass means
Patent
1997-12-02
1999-11-02
Pascal, Robert
Amplifiers
With amplifier bypass means
330149, H03F 100
Patent
active
059778253
ABSTRACT:
In order to provide a feed-forward amplifier with an error signal amplifier (V3) which only requires a reduced linear modulation range and thus is more economical, a pre-distortion device (VVZ) is connected electrically to the amplifier (V1) and a control unit (ST1) is provided which adjusts the pre-distortion device (VVZ) during operation of the amplifier (V1) in a nonlinear modulation range according to an error signal (f1) so that the error signal (f1) which is fed to the error signal amplifier (V3) is minimized.
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"Reduction of Noise and Distortion in Amplifiers Using Adaptive Cancellation", Ashok, K. Talwar, IEEE Transactions on Microwave Theory and Techniques, vol. 42, No. 6, Jun. 1994, pp. 1086-1087.
"Multilevel QAM Digital Radio", Yoshiaki Suzuki, et al, 2311 Fujitsu Scientific & Technical Journal 22 (1986) Autumn, No. 4, Kawasaki, Japan, pp. 294-306.
"A Highly-Efficient Linear Ampliflier for Satellite and Cellular Application", K.J. Parsons, et al, 1995 IEEE, pp. 203-207.
Patent Abstract of Japan, 57037909, Mar. 2, 1982, Sato Gunkicki: "Wiper Blade Electric Power Amplifier".
Choe Henry
Pascal Robert
Robert & Bosch GmbH
Striker Michael J.
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