Feedback circuit for push-pull inverters

Details Feedback circuit for push-pull inverters Feedback circuit for push-pull inverters

2007-11-13

2007-11-13

Vu, David H. (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

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

C315S220000, C315S224000, C315SDIG002

Reexamination Certificate

active

11181881

ABSTRACT:
A feedback circuit for push-pull inverters aims to improve the existing push-pull inverters that provide input electricity to a discharge lamp at a phase difference of 180 degrees without feedback electricity to regulate frequency signals and cannot effectively control uniform luminance of the discharge lamp. The invention includes a feedback device to get a detection electricity of the driving electricity of the discharge lamp through non-contact coupling induction. The detection electricity is transformed by the feedback device and output to a frequency control unit. The control unit can regulate and output the frequency signal in response to the luminance of the discharge lamp to timely adjust input electricity of a push-pull inverter.

REFERENCES:
patent: 4392087 (1983-07-01), Zansky
patent: 4523131 (1985-06-01), Zansky
patent: 6087757 (2000-07-01), Honbo et al.
patent: 6724126 (2004-04-01), Chou
patent: 2004/0239260 (2004-12-01), Nakano

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