I want a voltage controlled resistor for high voltages for a project I'm working on and using a common emitter/source transistor to shunt current into ground in order to get a desired voltage is not working well in my circuits because it is generating its own current. I need a true, end to end voltage controlled variable resistor with input voltage through the top and load on the bottom.
I've heard Jfets can act as resistors but in my simulations the source voltage just seems to copy whatever the voltage is on the gate. What am I doing wrong? Can you not use a jfet as a end to end resistor?
It should be noted that I plan on using a digital feedback loop to negate any non-linearity and that I will use a SIC Jfet for the high voltages.
To clarify, I effectively need a drop in resistor replacement that I can control with voltage