Electronic lighting controller

Details Electronic lighting controller Electronic lighting controller

1993-07-12

1997-02-18

Pascal, Robert

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Periodic switch in the primary circuit of the supply...

315324, 315231, 315 97, 315209R, 315224, 363134, H05B 3900, H05B 3702

Patent

active

056044097

ABSTRACT:
An electronic circuit for converting AC or DC input current to pulsating DC, then to high frequency AC. The DC input is used for aircraft applications, or in emergency situations. The circuit operates over a wide range of input voltages and frequencies, including aircraft 115 volts, 400 Hertz. The circuit has a multivibrator that receives a smooth DC operating potential. The multivibrator is operably connected to a differentiator that produces substantially square waveform outputs. Dual wave shape filters are operably connected to the differentiator to shape the square wave outputs into a sine wave and a cosine wave respectively. A transistor switch is operably connected to each wave shape filter. The circuit has a transformer operably connected between the transistor switches and a load. In a specific embodiment the loads are either hot or cold fluorescent lamps, or the like.

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patent: 5063331 (1991-11-01), Nostwick

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