RF amplifier principle circuit composed of RF2103P

Published:2011/10/26 21:11:00 Author:May | Keyword: RF amplifier | From:SeekIC

RF signal (RF) isinput by pin 1, enlarged by preamplifier and final power amplifier ( FPA), thenoutput by pin 14. There is a blocking coupling capacitor between pin 1 and preamplifier, so it does not need to add coupling capacitor. Output ends pin 8, 9, 13, 14 are connected inside of the chip. Normally, pin 13, 14 are connected outside to be uses the as signal output, which connects to the matching network to make the amplifier output resistance match with it, then it gets themaximum output power and efficiency; and pin 8, 9 are connectedoutsideto beas power supply end, when it works at 915MHz, it adds a filter capacitor C2(=2pF) to ground tomake up filter circuitwith second harmonic, which can shortconnect second harmonic effectively.



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