2011年全国大学生电子设计竞赛LC谐振放大器（D题）【本科组】吴诚志王慎波郑雷鸣2011年9月3日摘要本文主要论述了基于2N2222A三极管的LC谐振放大器的具体设计与实现，信号通过T型电阻网络实现阻抗匹配，并进行衰减以便于检测。然后将输出信号送给选频网络进行选频， LC谐振放大电路对信号进行高增益放大并输出信号。该放大器能够对高频小信号进行1000倍以上的放大，中心频率为15MHz。通频带内增益平坦，功耗低，稳定性好。关键词：2N2222ALC谐振放大中心频率增益AbstractThis paper mainly discusses the design and implementation of a LC resonant amplifier based on the 2N2222A transistor . The signal goes through the model T resistance network to realize impedance matching and decays in order to be convenient for detection. Then the output signal is transported to the frequency-selective network to choose frequency. The LC resonance amplifier circuit make a High-gain amplification and the output signal. The amplifier can expand signal with high frequency more than 1000 times, with center frequency of 15MHz. The signal increase flatly in the passband, the power loss is very low, and the system is very stability.Keywords: 2N2222Alc resonance amplifiercenter frequencygain