A drive-sense circuit coupled to a variable voltage load. The drive-sense circuit includes a current reference circuit operable to generate a current reference signal. The drive-sense circuit further includes a regulated impedance source circuit operable to generate a regulated impedance signal based on an analog regulation signal, where the regulated impedance signal is provided on a line to the variable voltage load to keep a load current on the line substantially matching the current reference signal, and where a voltage of the variable voltage load effects the regulated impedance signal. The drive-sense circuit further includes a impedance loop correction circuit operable to generate a comparison signal based on the current reference signal and the load current, where the comparison signal represents the voltage, and where the analog regulation signal is representative of the comparison signal.