Results: the linear amplification range of PCR and the best cycle number and template of RT-PCR were obtained.

结果：获取了P CR线性扩增范围，确定了RT - P CR的最佳循环次数和模板量。

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And the power amplifier can realize accurately tracking and amplification for ac signals with frequency range up to 1000hz.

功率放大器可以实现交流信号的准确跟踪和放大，输出频率范围可达1000赫兹。

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By changing the amplification multiple through DAC signals, the measurement range of the system is improved.

用DAC芯片程控信号调理电路的放大倍数，提高了系统的测量范围。

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