Drain electrode feed circuit of power amplifier tube

The invention relates to a drain electrode feed circuit of a power amplifier tube, and belongs to the technical field of communication countermeasure, and solves the problem that a power amplifier cannot meet the requirement of fast response. The circuit comprises a first switch connected in a power amplifier tube drain electrode power supply loop, a second switch connected in a power amplifier tube drain electrode discharge loop, and a switch control circuit. The first output end of the switch control circuit is connected with the control end of the first switch; the second output end of theswitch control circuit is connected with the control end of the second switch. When the first output end outputs a driving signal, the first switch is switched on to switch on a drain electrode powersupply loop of the power amplifier tube. When the second output end outputs a driving signal, the second switch is switched on to switch on a discharge loop of the drain electrode of the power amplifier tube. The conduction of