Precision current inverter/current source circuit composed of LOG101/LOG104 and op amp OPA2335
Source: InternetPublisher:清宁时光 Keywords: Current inverter current source circuit Updated: 2024/09/10
As shown in the figure, it is a precision current inverter/current source circuit composed of LOG101/104 and op amp OPA2335. The input current of LOG101/104 can only be positive current, that is, the input current can only flow into pin 1 and pin 8, which is 10nA~1mA. In some applications, the signal current is negative current, such as photomultiplier tube, photodiode, etc. The circuit in the figure can solve this problem. It uses the circuit in the additional figure to convert the negative signal current generated by the photodiode into a positive current flowing into LOG101.
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