CAJ | 학술논문

为了放大微弱的高频信号，需要使用LC谐振放大器。以三极管等分立元件构建的单调谐放大器，具有功耗小，噪声低等优点。三级谐振放大器级联实现较大的增益，级间通过高频变压器互感耦合，便于调整谐振频率，并减少损耗。经测试，本LC谐振放大器放大中心谐振频率15．1MHz，偏差100kHz，-3dB带宽300kHz，实现80dB的放大倍数，功耗324mW。输入50μV微弱信号时，输出无明显失真。结果表明，该LC谐振放大器具有低噪声、低功耗、高增益等优点。
위료방대미약적고빈신호，수요사용LC해진방대기。이삼겁관등분립원건구건적단조해방대기，구유공모소，조성저등우점。삼급해진방대기급련실현교대적증익，급간통과고빈변압기호감우합，편우조정해진빈솔，병감소손모。경측시，본LC해진방대기방대중심해진빈솔15．1MHz，편차100kHz，-3dB대관300kHz，실현80dB적방대배수，공모324mW。수입50μV미약신호시，수출무명현실진。결과표명，해LC해진방대기구유저조성、저공모、고증익등우점。
This LC resonance transistor amplifier, is the construction of high frequency division components,using single tuned amplifier as the main body, 3 stages amplification achieve 80 dB amplification. Center the resonant frequency 15.1 MHz, deviation 100 kHz, -3 dB bandwidth 300 kHz, power consumption of 324 mW. In order to facilitate the measurements, add a fixed 40 dB attenuation device. Resonance amplifier 50 μV input, output no significant distortion. This system has low noise, low power consumption, high power gain, AGC, etc.