Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Periodic switch cut-out
Patent
1990-01-30
1990-12-25
Mis, David
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Periodic switch cut-out
315127, 315159, 315219, H05B 4100, H05B 4129
Patent
active
049806114
ABSTRACT:
An overvoltage shutdown circuit for use with high voltage excitation supplies for gas discharge tubes is described. In one embodiment, a spark gap is placed between the secondary output windings of a resonant conversion output transformer. In a second embodiment, a sense conductor is placed in proximity to the high voltage output windings of the resonant conversion transformer to receive a spark in the event of overvoltage on the output. A sensed spark causes a latching circuit to stop the resonant conversion thereby protecting the power supply from a potentially damaging overvoltage situation.
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Letter from Advanced Neon Systems (undated); "JB Transformer Instructions".
Data Sheet from National Semiconductor describing LM556 Dual Timer Circuit.
Mis David
Neon Dynamics Corporation
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