High frequency luminous tube power supply having neon-bubble and

Details High frequency luminous tube power supply having neon-bubble and High frequency luminous tube power supply having neon-bubble and

1992-04-28

1994-11-22

Pascal, Robert J.

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

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

315276, 315282, 315DIG5, 315DIG7, 315307, H05B 3702

Patent

active

053672240

ABSTRACT:
A low frequency parasitic oscillation suppressor for series, current-fed high frequency luminous tube power supplies. The suppressor incorporates a transformer, the primary of which serves as the conventional series input choke. A parasitic damping resistor and diode are connected in series with the transformer secondary and this series combination is, in turn, connected across the DC supply source for the oscillator. The transformer turns-ratio is selected such that no current flows through the series secondary under normal operating conditions. Upon the generation of a low frequency parasitic oscillation, a current is caused to flow through the secondary including the parasitic damping resistor thereby dampening the parasitic oscillation while maintaining normal high frequency operation.

REFERENCES:
patent: 5032767 (1991-07-01), Erhardt et al.

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