DigiTan
New Member
Previously in this circuit, I noticed the value R had a direct impact on the overall Vout/Vcc gain of the circuit. Problem is: the R resistance needs to be electronically adjustable and I can't find digital potentiometers with 2 Watt ratings.
I thought of adding a BJT in parallel with the resistor. The problem is there's an AC signal on the resistor (24Vpp) that's capable of destroying a bipolar transistor. I heard JFETs may be a better option for controlling a bi-directional signal. Would a parallel JFET help scale this bi-directional current through the resistor?
I thought of adding a BJT in parallel with the resistor. The problem is there's an AC signal on the resistor (24Vpp) that's capable of destroying a bipolar transistor. I heard JFETs may be a better option for controlling a bi-directional signal. Would a parallel JFET help scale this bi-directional current through the resistor?