Amplifiers – Hum or noise or distortion bucking introduced into signal...
Patent
1993-06-21
1994-11-01
Sikes, William L.
Amplifiers
Hum or noise or distortion bucking introduced into signal...
330144, 330150, 327317, 348710, 348707, 348170, H03F 1900, H03G 900
Patent
active
053610393
ABSTRACT:
The disclosure relates to the linear power amplification, in a single channel, of a composite signal formed by two independent signals. In a single channel formed by correction means followed by a linear preamplifier followed by a saturated amplifier, the filtering and symmetry effect produced, both in the correction means and in the saturated amplifier, is advantageously used to compensate for clipping of the composite signal due to the amplifier. This makes it possible to obtain an undistorted output signal whose amplitude exceeds the level of saturation of the saturated amplifier. The compensation makes it necessary for the transfer characteristic of the correction means to have a given slope between two points beyond which the saturation appears in the saturated amplifier and a slope that is substantially thrice the given slope on each side of these two points.
REFERENCES:
patent: 4682119 (1987-07-01), Michel
16th European Microwave Conference, Sep. 8-12, 1986, Dublin, Ireland, (Published by Microwave Exhibitions and Publishers Ltd., 1986, pp. 810-815, Tunbridge Wells (GB), Conference Proceedings, J. Czech, "A Linearized L-Band 100 Watt TWT Amplifier for Multicarrier Operation."
Abraham Fetsum
Sikes William L.
Thomson-LGT Laboratoire General des Telecommunications
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