A design I am working on requires a ±20v differential line driver, but I can't seem to find such a component. The highest voltage line drivers seem to be RS-485, which aren't high enough. Fully differential op-amps seem to top out at about ±18v.
Do high voltage differential line drivers or op-amps exist?
If not, what's the best way to make one from discrete components?
The bandwidth is pretty low, a rise time of several tens of micro seconds is fine. The ±20v output voltage swing implies 40v between the output pins.
Transmission line length is just a few inches.
The impedance is unknown, but I'm going to assume it's reasonably high impedance and low capacitance.