Amplifier system with controlled reactance

Amplifiers – With semiconductor amplifying device – Including gain control means

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330 95, H03G 312

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active

059297077

ABSTRACT:
An amplifier system for a radio receiver, comprising: an amplifier for amplifying a signal applied to an amplifier input to generate an amplifier output signal; a variable reactance means coupled between the emitter or source of the amplifier and a ground voltage; and a feedback loop for sensing the amplifier output signal and, in response to a relatively high level of the output signal, controlling the reactance of the variable reactance means to maintain the amplifier in a substantially linear mode of operation.

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"Mobile P-System Satellite System Comparison", International Journal of Satellite Communications, vol. 13, pp. 453-417 (1995), Klaus G. Johannsen.
"Adaptive Compensation For Microwave Linearizer", Buoli C et al., European Microwave Conference Management Committee, Sep. 06, 1993, pp. 439-442, XP000629958.

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