(19)

(11)

EP 1 145 415 A1

(12)

(43) Date of publication: 17.10.2001 Bulletin 2001/42 (21) Application number: 99964889.2 (22) Date of filing: 16.12.1999

(51) International Patent Classification (IPC)7: H02M 3/335 (86) International application number: PCT/SE9902/390 (87) International publication number: WO 0038/305 (29.06.2000 Gazette 2000/26)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 21.12.1998 SE 9804454 (71) Applicant: Telefonaktiebolaget L M Ericsson (Publ) 126 25 Stockholm (SE)	(72) Inventors: HEDENSKOG, Bo S-175 67 Järfälla (SE) SVÄRDSJÖ, Claes S-131 46 Nacka (SE) (74) Representative: Rosenquist, Per Olof  Bergenstrahle & Lindvall AB,P.O. Box 17704 118 93 Stockholm 118 93 Stockholm (SE)