Overvoltage protection and gain bootstrap circuit of power amplifier

An overvoltage protection and gain bootstrap circuit of a power amplifier, comprising:

• a power amplification transistor and a diode, and the diode is reversely connected with a gate of the power amplification transistor;
• wherein
• a negative electrode of the diode is connected with the gate of the power transistor;
• a positive electrode of the diode is connected with a constant voltage source, such that a function of overvoltage protection and gain bootstrap of the circuit is realized by controlling a turn-on state of the diode;
• the gate of the power amplification transistor is connected with an input end of a radio frequency signal, a drain of the power amplification transistor is connected with an output end of the radio frequency signal, and a source of the power amplification transistor is grounded, so as to realize power amplification of the radio frequency signal;
• the overvoltage protection and gain bootstrap circuit further comprising a first capacitor and a second capacitor;
• wherein
• the first capacitor is provided between the gate of the power amplification transistor and the input end of the radio frequency signal, and the second capacitor is provided between the drain of the power amplification transistor and the output end of the radio frequency signal.

An overvoltage protection and gain bootstrap circuit of a power amplifier, comprising:

• a power amplification transistor and a diode, and the diode is reversely connected with a gate of the power amplification transistor;
• wherein
• a negative electrode of the diode is connected with the gate of the power transistor;
• a positive electrode of the diode is connected with a constant voltage source, such that a function of overvoltage protection and gain bootstrap of the circuit is realized by controlling a turn-on state of the diode;
• the gate of the power amplification transistor is connected with an input end of a radio frequency signal, a drain of the power amplification transistor is connected with an output end of the radio frequency signal, and a source of the power amplification transistor is grounded, so as to realize power amplification of the radio frequency signal;
• the overvoltage protection and gain bootstrap circuit further comprising a radio frequency choke, and the radio frequency choke is connected with the drain of the power amplification transistor.