CONSERVATION OF THE LINE EQUIPMENT OF AN ISOLATOR-FREE AIR STRENGTHER BY DYNAMIC CHALLENGED ACTIVE BUILDINGS

摘要

An amplifier circuit ( 100 ) includes a driver stage ( 120 ) with active devices ( 140 ) for pre-amplification and output of a pre-amplified signal; and an output stage ( 160 ) with active devices ( 180 ) for further amplification of the pre-amplified signal and output of an amplified signal. A detector ( 190 ) measures levels of forward and reflected parts of the amplified signal, and a control circuit ( 145 ) independently and selectively controls turning on and off of the active devices ( 140, 180 ) of the driver and output stages ( 120, 160 ) as a function of the levels of the forward and reflected signals to substantially maintain linearity of the amplifier circuit ( 100 ) with load variations.