**Part Number:**LOG114

**Other Parts Discussed in Thread:**OPA192, LOG200

Hello engineers, I have a question here to ask you, the input circuit of the logarithmic amplifier after the precision inverter 1:1 conversion, is it possible to truncate the input current, such as, the input 500nA after the current bias circuit becomes 0nA, and the back input is also based on this 500nA subtracted from the output, assuming that the input current range of 500nA - 100uA, after the precision current bias circuit (biased to 500nA), then the input to the logarithmic amplifier range of 0 - 99.5 Assuming the input current range is 500nA--100uA, after the precision current bias circuit (biased to 500nA), the input to the logarithmic amplifier range is 0-99.5uA, I don't know if you have any recommended circuit design!

I then precision reverse conversion circuit design, resistance modification, found that it will be scaled down, can not do the truncation effect, I wonder if you engineers have a relevant design recommendations,

thank you for your answers and help!

Looking forward to everyone's responses