Abstract: In a circuit for use with a multi-character alphanumeric gas discharge display tube in multiplex operation, each of the character locations is provided with a resistor between its keep-alive cathode and ground and an anode driver transistor connected in series circuit relation with each of the anodes. A switching transistor is connected to each of the resistors to shunt the resistors sequentially in response to receipt of multiplexed logic pulses. The shunting of a given resistor renders the anode driver transistor of an adjacent character conductive in response thereto.