The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 29, 1997
Filed:
Aug. 25, 1994
Stefan Groiss, Dornbirn, AT;
Tridonic Bauelemente GmbH, Dornbirn, AT;
Abstract
There is provided an electronic ballast for supplying a load, for example a lamp, in particular a gas discharge lamp, with an a.c. voltage (Un) the frequency of which is higher than the mains frequency. The ballast has a rectifier (GL) to be connected to the a.c. mains, an inverter connected downstream thereof, having two switches (S2, S1), which inverter generates the higher frequency a.c. voltage for the load (Z), and an electronic harmonics filter arranged between the rectifier (GL) and the inverter, in the form of a clocked switching controller. The control switch (S1) of the clocked switching controller at the same time forms one of the two switches (S1) of the inverter.