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log114采用脉冲输入设计的问题

Other Parts Discussed in Thread: LOG114

目前用log114的典型电路设计了一套系统,采用的方法是让光源明暗交替,用光电池接收光源产生电流,光源亮时log114的Vlogout的电压减去暗时Vlogout的电压,用来消除外界光的影响,及温漂。

发现光源暗时,log114的输入电流I1和I2电流都很小,但输出电压不确定,有的芯片很高,有的芯片低。所以用脉冲的方式目前没想出好的办法。