Power amplification circuit and its initialization method and power amplification method
A technology of a power amplifier and an initialization method, applied in the directions of power amplifiers, improving amplifiers to improve efficiency, and improving amplifiers to reduce temperature/power supply voltage changes, etc. Excellent linearity, stable gain, and improved performance
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[0028] The structure of the power amplifier circuit of the present invention can be referred to image 3 and Figure 4 shown, including:
[0029] The power tube circuit amplifies the power of the input signal, in Figure 4 Among them, the power tube V1 and its peripheral circuits are responsible for amplifying the power, and then the amplified signal is output from the port RFout;
[0030] The voltage-controlled attenuator is connected to the power tube circuit to control and adjust the gain during power amplification. Figure 4 Among them, the voltage-controlled attenuator N1 is connected to the power tube V1 to control and adjust the gain of the entire power amplifier circuit;
[0031] The first bias circuit, connected to the bias end of the power tube circuit, controls the bias voltage of the power tube circuit; Figure 4 Among them, the first bias circuit is composed of the operational amplifier A1B and its surrounding circuits, and the bias circuit can adjust and cont...
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