Description: The system consists of pre-broadband amplifier module, gain control module, passive attenuation module, power amplifier module and DC power supply modules, with manual within the range of 0 ~ 60dB continuously adjustable, 0.3M ~ 100MHz bandwidth capabilities. The first amplification stage, using two wideband low-noise amplifier chip ADA4895 cascade amplification of the input signal, and the bandwidth of 800MHz for the variable gain amplifier AD8368 magnification adjustment, the final amplifier THS3001 feedback current through the low-noise power amplifier to achieve 1V RMS output. In the system design, the use of a reasonable impedance matching circuit layout and specifications of the high frequency effective heat setting, and considering the decoupling, filtering, and the use of shielded coaxial cable interference and reduce high-frequency noise from the signal and excited, and comprehensively improve the stability of the system.
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2013 the national electricity - rf amplifier design\2013全国电赛---射频放大器设计---.pdf
2013 the national electricity - rf amplifier design
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