Device protection circuit for X-band power amplifier

• Main Author: LIU CONGYING
• Format: Patent
• Language: Chinese; English
• Published: 26.05.2023
• Subjects: AMPLIFIERS; BASIC ELECTRONIC CIRCUITRY; ELECTRICITY

The utility model relates to the technical field of power supply protection circuit design of power amplifier devices, in particular to a device protection circuit for an X-band power amplifier. According to the device protection circuit for the X-band power amplifier provided by the utility model, a multi-stage detection circuit and a sequential circuit are adopted, and the device protection circuit comprises a first-stage voltage detection circuit, a comparator circuit, a second-stage voltage detection circuit, a monitor circuit, an AND gate circuit, a third-stage voltage detection circuit and a power-on circuit, so that the circuits are started in sequence; -5V grid voltage power supply is guaranteed, and then 28V leakage voltage power supply is guaranteed. The whole circuit is stable in state and rapid in switching, better safety of the power amplifier device can be guaranteed, meanwhile, the GaN power amplifier device can be well protected to be normal in the X wave band, and good stability is achieved.