With the measurement principle of spectrophotometry, the analyzer calculates absorbency by software . avoiding the mathematical formulas of logarithmic ratio amplifiers.

仪器采用吸光光度法测量原理，在测量方法上避免了模拟对数放大与运算；

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Two kinds of logarithmic ratio amplifiers used for biochemical analyzers were designed and the mathematical formulas of the amplifiers were derived through experiments.

设计了两种用于生化分析仪器的对数放大电路，通过实验得出了对数放大电路的数学表达式。

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