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. 05, 2002
Filed:
May. 24, 2000
Nokia Mobile Phones Ltd., Espoo, FI;
Abstract
The invention relates to a method for forming an operating voltage (V ) for an electronic device ( ) from a supply voltage (V ) by means ( ) for forming the operating voltage. In the method, a minimum value (V ) and a maximum value (V ) are defined for the operating voltage (V ). The means ( ) for forming the operating voltage are provided with at least a first operating voltage supply block ( ) and a second operating voltage supply block ( ). In the first operating voltage supply block ( ), the output voltage is limited smaller than said maximum value (V ) for the operating voltage. Furthermore, at least a first limit value (V ) is determined, and the supply voltage (V ) is compared with said first limit value (V ), wherein if the supply voltage (V ) is greater than said first limit value (V ), the first operating voltage supply block ( ) is activated to form the operating voltage (V ) from the supply voltage (V ). If the supply voltage (V ) is substantially smaller than said first limit value (V ), the second operating voltage supply block ( ) is activated to form the operating voltage (V ) from the supply voltage (V ).