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Linear power amplifier circuit composed of RF2132

2017-03-16 19:03  
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Linear power amplifier circuit composed of RF2132
The diagram is linear power amplifier circuit composed of RF2132. Radio-frequency signal (RF) isinput by pin 3, enlarged by preamplifier and final power amplifier, then output by pin 10, 11. Pin 3 is directly coupling with internal amplifier, and it is added a blocking coupling capacitor, and the input resistance of pin 3 is 50Ω, but the precise resistance is determined by interstage matching network connected to pin 1. L1 is output center frequency level adjusting inductance; R1 can improve linearity, add first level ampliifer current bias; L2 is amplifier output stage bypass inductor. Output ends pin 10, 11, 14, 15 are connected to the chip. Pin 8 is connected topower control foot (PC) to control this pin voltage and power. At room temperature, when voltage is inlow level ( when it is 0.5V or lower) , amplifier power is on the shutoff state. Vcc=4.8V, Vpc=4.0V.