POWER AMPLIFIER WITH PROTECTION Russian patent published in 2006 - IPC H03F3/26 H03F1/52 

FIELD: radio engineering for use in transistor amplifying devices.

SUBSTANCE: amplifier contains two identical amplifier channels 1,2, each consisting of input 3, intermediate 4, pre-end 5 and end 6 cascades, check connection circuits 7, circuit for protection from overload during enabling 8. introduced into end cascades 6 are "volt adding" circuits 16, connected through bidirectional electronic key 15, controlling input of which through serially connected threshold device 14 and rectifier 13 is connected to output of adder 12 of signals, inputs of which through filters of upper frequencies 10,11 are connected to outputs of amplification channels.

EFFECT: increased efficiency and protection from penetration of through current in end cascade in mode of limiting output signal.

1 dwg