Strobe flash lamp power supply with afterglow prevention circuit
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United States of America Patent
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-
Jul 5, 1988
Issued Date -
N/A
app pub date -
Apr 24, 1987
filing date -
Nov 4, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A variable frequency DC to DC converter generates a pulsed, variable magnitude output voltage where the frequency of the pulsed output voltage varies with changes in the magnitude of the output voltage. An energy storage capacitor is coupled between the converter coupled inductor and strobe flash lamp or other gaseous discharge tube and is periodically discharged through the flash lamp. A variable impedance device in the form of a capacitor is coupled in series with the flow of current from the coupled inductor into the energy storage capacitor to provide a low impedance current flow path when energy is transferred from the coupled inductor into the capacitor and to provide a high impedance current flow path between the converter DC voltage input terminals and the energy storage capacitor when energy is transferred from the capacitor into the strobe flash lamp.
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