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:
Mar. 06, 2001
Filed:
Jan. 02, 1998
Håkan Andersson, Malmö, SE;
Johan Uggmark, Lund, SE;
Telefonaktiebolaget LM Ericsson, Stockholm, SE;
Abstract
A driver circuit,for driving functional devices, such as an LED,, a buzzer,, a voltage converter or an EL-lamp, and a method of operating the driver circuit are provided. The circuit includes an inductor,, first and second connection points for connection of a voltage source,, switching means,which when in a first state allows an electrical current to flow from the first connection point and through the inductor to thereby charge the inductor with energy and when in a second state substantially prevents an electrical current from flowing from the first connection point to the inductor and at least two functional devices, the function of which are activated when energy is discharged from the inductor to the at least two functional devices.