Gas discharge tube driver and level shifter circuit

Details Gas discharge tube driver and level shifter circuit Gas discharge tube driver and level shifter circuit

1979-02-14

1980-12-30

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

3151692, 315323, 340758, 340802, H05B 4116, G09G 310

Patent

active

042426154

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.

REFERENCES:
patent: 3813575 (1974-05-01), Webb
patent: 3815120 (1974-06-01), Kanda
patent: 3842314 (1974-10-01), Iwakawa et al.

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