Current / voltage conversion circuit composed of LM301

Published:2011/7/6 8:09:00 Author:Lucas | Keyword: Current conversion , voltage conversion | From:SeekIC

This is a low-input impedance conversion circuit with reference resistor RS being connected to the amplifier's feedback loop and input impedance in approximately zero, and the input current flows into Al's output end through Rs. The maximum switching current is decided by the op amp output current, and the maximum switching current of circuit is lOmA. When it needs to increase the current conversion, the output end of Al can be added current amplifier. VTl and VT2 use 2N3954 FET with the gate leakage current in 5OpA. If gate - drain voltage is reduced, the leakage current can be reduced to lOpA in the normal temperature. VT3 and VT4 are the protection FET (2SKl4lA).



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