Published:2012/8/23 21:36:00 Author:Ecco | Keyword: Precision , current inverter, current source , op amp | From:SeekIC
LOG101/104 's input current can only be positive current, that is, input current only flows into pin 1 and pin 8, which can be fine tuned as 10nA to 1mA. In some applications, the signal current is a negative current, such as: photomultiplier, tube, photodiode. The circuit shown in diagram can resolve this problem, which utilizes the circuit switch the negative signal current generated by photodiodes to a forward current flowing into LOG101.
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