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:
Apr. 07, 1992
Filed:
May. 13, 1991
Wolfgang Daub, Lippstadt, DE;
Hella KG Hueck & Co., , DE;
Abstract
In a circuit arrangement for ignition and operation of a high pressure gas discharge lamp (GEL) for motor vehicles include: a desired power value determining device (LS) coupled to a first input of an integrating comparator (K) whose second input is coupled to an output of a multiplier; a switching device (S) which couples either a phase comparator or the integrating comparator (K) with a voltage control oscillator; and a status recognition device (ST), coupled with a current measuring device, for controlling the switching device which when the high pressure gas discharge lamp is not ignited couples the oscillator with the phase comparator and which when the high pressure gas discharge lamp is ignited couples the oscillator with the integrating comparator.