Time-adjustable positive and negative voltage power-on sequence control circuit for power amplifier

The invention discloses a time-adjustable positive and negative voltage power-on sequence control circuit for a power amplifier. The time-adjustable positive and negative voltage power-on sequence control circuit comprises four parts, namely a voltage conversion circuit, a time delay circuit, a drain electrode output driving circuit and a grid electrode output driving circuit. The whole circuit only needs a single power supply to supply power, the voltage conversion circuit is used for generating working voltage required by the 555 timer and the voltage polarity conversion chip, and in addition, the 555 timer can be protected and cannot be damaged due to too large input current; the delay circuit generates output delay time between the drain electrode and the grid electrode, and the delay time can be controlled by adjusting the slide rheostat; the drain electrode and grid electrode driving circuit is used for generating voltage and current required by the power amplifier so as to prevent the driving capabilit