Amplifiers – Hum or noise or distortion bucking introduced into signal...
Patent
1992-10-29
1993-11-30
Millins, James B.
Amplifiers
Hum or noise or distortion bucking introduced into signal...
328162, 330 52, H03F 132
Patent
active
052669068
ABSTRACT:
A linear amplifier performing a continuous distortion compensation control without no line cut to prevent deterioration of intermodulation distortion and ensure talking quality including a power amplifier for amplifying a plurality of carriers and a distorter for generating an intermodulation distortion with an equal amplitude of an antiphase for negating an intermodulation distortion generated by the power amplifier. A processing unit outputs an attenuation value control voltage and a phase control voltage to the distorter depending on an ambient temperature information detected by a temperature sensor and control voltage data corresponding thereto, read out of a memory.
REFERENCES:
patent: 4329655 (1982-05-01), Nojima et al.
Toshio Nojima et al., "TWT Amplifier Linearization by Synthesizing Complex Predistortion", Bulletin MW77-100, The Institute of Electronics and Communication Engineers of Japan, pp. 87-94, Dec. 1978.
Toshio Nojima et al., "Predistortion Nonlinear Compensator for Microwave SSB-AM System", Bulletin '84/1 vol. J67-B No. 1, The Institute of Electronics and Communication Engineers of Japan, pp. 78-85, Jan. 1984.
Millins James B.
NEC Corporation
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