Hello guys,I want to design voltage-controlled current source for my current project. The currents should be in a range from 0 to 2.5mA. Load resistance should be up to 5Kohm. My idea was to use unity gain amplifier together with the buffer in the configuration like this: Voltage-dependent generated current can be expressed as
I = Vsine/R8;
You could check this article to help you in your design.
AD8276, a unity gain difference amplifier, is a good candidate for your design.
It costs a dollar on A grade, here is the product page on this link.