(19)

(11)

EP 1 371 136 A1

(12)

(43) Date of publication: 17.12.2003 Bulletin 2003/51 (21) Application number: 01914121.7 (22) Date of filing: 13.03.2001

(51) International Patent Classification (IPC)7: H03K 3/0231 (86) International application number: PCT/IB0100/472 (87) International publication number: WO 0207/3802 (19.09.2002 Gazette 2002/38)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (71) Applicant: The National University of Singapore Singapore 119260 (SG)	(72) Inventors: LIU, Jonathan Tun Nan Singapore 570261 (SG) JOE, Jurianto,Singapore Science Park II Singapore 1176 74 (SG) YONG, Sion, Siew Singapore 310214 (SG) LYE, Kin, Mun Singapore 118667 (SG) (74) Representative: Kazi, Ilya et al Mathys & Squire,100 Gray's Inn Road London WC1X 8AL London WC1X 8AL (GB)