H - Electricity – 03 – F
Patent
H - Electricity
03
F
H03F 1/00 (2006.01) H03F 1/32 (2006.01)
Patent
CA 2145918
A first pilot signal is superimposed onto an input signal to thereby distribute the signal as a first signal and a second signal to two destinations. The first signal is fed via an equalizer to a main amplifier for amplification thereof such that a second pilot signal is mixed with the amplified signal to attain a main amplification signal. Subtraction is conducted between the second signal and the main amplification signal to extract a distortion signal to be fed via an equalizer to an auxiliary amplifier so as to produce an auxiliary amplification signal. Between the main and auxiliary amplification signals, there is effected subtraction to attain a differential signal. The pilot signals are detected according to the differential and output signals. The equalizers are controlled to set the pilot signals to a minimum value. Consequently, there is achieved a linear amplifier obtaining a stable amplification signal with reduced distortion in a wide band.
Un premier signal pilote est superposé à un signal d'entrée en vue de la transmission de ce signal à deux destinations sous la forme d'un premier signal et d'un second signal. Le premier signal est transmis à un amplificateur principal via un égaliseur et un second signal pilote est mélangé au signal amplifié pour donner un signal d'amplification principal. Une soustraction est effectuée entre le second signal et le signal d'amplification principal pour obtenir un signal de distorsion qui est appliqué à un amplificateur auxiliaire via un égaliseur pour produire un signal d'amplification auxiliaire. Une soustraction est effectuée entre les signaux d'amplification principal et auxiliaire pour produire un signal de différence. Les signaux pilotes sont détectés d'après les signaux de différence et de sortie. Les égaliseurs sont réglés de façon à minimiser les signaux pilotes. On obtient ainsi un amplificateur linéaire produisant un signal amplifié stable à distorsion réduite dans une large bande de fréquences.
Corporation Nec
G. Ronald Bell & Associates
LandOfFree
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