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EP 4 487 468 A1

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(43) Date of publication: 08.01.2025 Bulletin 2025/02 (21) Application number: 23714880.4 (22) Date of filing: 28.02.2023

(51) International Patent Classification (IPC):  H03F 1/14(2006.01) H03F 3/24(2006.01) H03F 1/56(2006.01) H03F 3/193(2006.01) H03F 3/45(2006.01) (52) Cooperative Patent Classification (CPC): H03F 1/14; H03F 3/193; H03F 3/245; H03F 3/45183; H03F 3/45475; H03F 2200/222; H03F 2200/387; H03F 2200/318; H03F 2200/451; H03F 1/56; H03F 2200/498; H03F 2200/87 (86) International application number: PCT/US2023/014135 (87) International publication number: WO 2023/167864 (07.09.2023 Gazette 2023/36)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 01.03.2022 US 202217683607 15.09.2022 US 202217945520 (71) Applicant: Apple Inc. Cupertino CA 95014 (US)	(72) Inventors: ADNAN, Muhammad Cupertino, California 95014 (US) GUAN, Xiang Cupertino, California 95014 (US) (74) Representative: Lang, Johannes  Bardehle Pagenberg Partnerschaft mbB Patentanwälte, Rechtsanwälte Prinzregentenplatz 7 81675 München 81675 München (DE)