Voltage to Current Converter using Op Amp

Hi friends, in this post we will see how to convert voltage into current using simple circuitry. In most of the cases we get the output of measuring devices in the form of voltage. It is not good to transmit this output voltage to the destination directly. Due to addition of noise and wire impedance the output voltage may get corrupted. So in such cases we have convert that voltage into current form. So let us see voltage to current converter.

Voltage to Current Converter using Op Amp

Following circuit shows the voltage to current converter using operational amplifier. It consist of simple resistance connected to the inverting and non inverting terminals of op amp.

[caption id="attachment_898" align="aligncenter" width="228"] Voltage to Current Converter[/caption]

In this circuit the load is grounded and the current through the load can be calculated as follows.





The current through the load is given by,



The gain of the amplifier is



So



Substituting this value in above equation we get,



Thus the current is directly proportional to the applied voltage and the resistance used in the circuit. it should be noted that all the resistances used in the circuit are equal to R.

See alos: Current to Voltage Converter

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