(19)

(11)

EP 3 956 981 A1

(12)

(43) Date of publication: 23.02.2022 Bulletin 2022/08 (21) Application number: 20791902.8 (22) Date of filing: 15.04.2020

(51) International Patent Classification (IPC):  H03D 7/16(2006.01) H03F 3/193(2006.01) H03D 7/18(2006.01) (52) Cooperative Patent Classification (CPC): H03D 7/18; H03F 3/195; H03F 1/223; H03F 2200/451; H03F 2200/294; H03F 2200/541; H03D 7/165; H03D 7/1458; H03D 7/1441; H03D 7/1483 (86) International application number: PCT/US2020/028361 (87) International publication number: WO 2020/214733 (22.10.2020 Gazette 2020/43)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 19.04.2019 US 201962836295 P 16.05.2019 US 201916414480 (71) Applicant: Swiftlink Technologies Co., Ltd. Suzhou Industrial Park Suzhou Jiangsu (CN)	(72) Inventors: HUANG, Min-Yu Cupertino, California 95014 (US) CHEN, Thomas Cupertino, California 95014 (US) (74) Representative: McKinnon, Alistair James  WP Thompson 138 Fetter Lane London EC4A 1BT London EC4A 1BT (GB)