## How do i connect this V-I converter up

Hi all,

I need to have an AC current source for testing but i do not have any equipment that can generate an AC current source. I have a function generator to produce an AC sine voltage and thinking to convert V to I using the transconductance op amp.

The first stage of my test circuit consists of an tranimpedance amplifier with other stages at the back and how can i connect V to I and I to V up? (Ciruit as attached)

Is there any other suggestion for the conversion of the AC voltage source to AC current souce from function generator?
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Mentor
 Quote by riie Hi all, I need to have an AC current source for testing but i do not have any equipment that can generate an AC current source. I have a function generator to produce an AC sine voltage and thinking to convert V to I using the transconductance op amp. The first stage of my test circuit consists of an tranimpedance amplifier with other stages at the back and how can i connect V to I and I to V up? (Ciruit as attached) Is there any other suggestion for the conversion of the AC voltage source to AC current souce from function generator?
You could just use a resistor to convert your voltage source to a current. What is the load impedance of your circuit?

Or else just use the left-hand circuit in your attachment...
 If I use a resistor to convert to current, wouldn't the transimpedance amplifier become an inverting amplifier as the resistor will be in series at the input? Is there a way to connect up the left hand side current output the the input at the right hand side?

## How do i connect this V-I converter up

Any suggestions?

Mentor
 Quote by riie If I use a resistor to convert to current, wouldn't the transimpedance amplifier become an inverting amplifier as the resistor will be in series at the input? Is there a way to connect up the left hand side current output the the input at the right hand side?
Does this thread from early February help?