MOS Circuit for generating a square wave form

Details MOS Circuit for generating a square wave form MOS Circuit for generating a square wave form

1978-05-15

1980-04-29

Smith, Alfred E.

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

340805, 340811, H04B 3700, H05B 3900, H05B 4100

Patent

active

042008220

ABSTRACT:
A circuit for generating a square wave form which circuit comprises two MOSFETs and is driven by only one control logic signal. A first MOSFET is connected between a ground potential power supply and the circuit output line while a second MOSFET is connected between the circuit output line and a positive potential power supply. The gate of the second MOSFET is connected to the source of the first MOSFET which has a gate connected to receive the control logic signal. When the logic signal is at a high level, the first MOSFET is turned on and the gate of the second MOSFET is pulled down to ground potential such that the second MOSFET is turned off. Thus, the circuit output line will be near the ground potential. When the logic signal switches to a low level, the first MOSFET is turned off and the voltage across a capacitor which has been charged by a power supply causes the second MOSFET to turn on such that the circuit output line will be near the positive potential. This circuit is typically used to drive capacitive type loads such as those found in gas discharge display devices.

REFERENCES:
patent: 3821596 (1974-06-01), Leuck
patent: 4070600 (1978-01-01), Butler et al.
patent: 4072937 (1978-02-01), Chu

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