Abstract: Driver circuits for plasma panels and similar matrix display devices are disclosed. Each driver circuit includes a single MOS transistor for coupling sustain signals to an associated row or column conductor of the panel. The drain of the transistor is connected to the associated conductor. For a first polarity of sustain signal, the transistor is operated in a conventional manner. For the second polarity of sustain signal, the transistor is operated in an unconventional manner in which the junction between the drain and the semiconductor layer in which the transistor is disposed is forward-biased. The second polarity of sustain signal is thereby extended through the transistor by way of a forward-biased diode path rather than by way of its channel. Write and erase signal waveforms are continuously applied to each driver circuit. Additional MOS circuitry in each driver circuit is responsive to an applied address signal to couple the write and erase signals through to the associated conductor.