I have a sensor that output signal values 5-15V. I wish to translate the given signal using op amp to 30-50V. Can u help me with the values of resistors and circuit diagram which shows sensor as well. Is it necessary to use buffer circuit?

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    \$\begingroup\$ Welcome to EE.SE. Read a similar post and its answers. \$\endgroup\$
    – nidhin
    Apr 4, 2015 at 7:52
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    \$\begingroup\$ What frequency spectrum is the sensor output? Why do you need such a large DC offset on the output? \$\endgroup\$
    – Andy aka
    Apr 4, 2015 at 9:19

1 Answer 1


You are looking to step up the input voltage ranging from 5-15 to 30-50Volts. This calls non inverting amplifier where the you need to choose Rf and Rin resisters such that the ratio of (Rin+Rf)/Rin is 6. This will help acheive 30 V when the input is 5 V.

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    \$\begingroup\$ Then for an input of 15V, output will be 90V !!! Which is not what OP wants. \$\endgroup\$
    – nidhin
    Apr 4, 2015 at 9:22
  • \$\begingroup\$ I agree to your point when it is 15 Volts it will be 90. This gain will help to achieve the 5 Volts to 30 volts. Is it possible for us variable resistor at the input so that it possible for us to adjust the gain. You input here will be of help to me . \$\endgroup\$
    – shri
    Apr 4, 2015 at 10:58
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    \$\begingroup\$ @shri - An op amp cannot (directly) provide an output greater than its power supply. So please provide the manufacturer and part number of an op amp which uses a 100 volt power supply. \$\endgroup\$ Apr 4, 2015 at 11:26

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