(19)
(11) EP 4 559 080 A1

(12)

(43) Date of publication:
28.05.2025 Bulletin 2025/22

(21) Application number: 22951425.2

(22) Date of filing: 19.07.2022
(51) International Patent Classification (IPC): 
H02M 3/155(2006.01)
H04R 17/00(2006.01)
 H02M 1/08(2006.01)
(52) Cooperative Patent Classification (CPC):
H04R 17/00; H02M 3/158; H02M 1/14; H02M 3/156; H04R 2201/003; H04R 3/00
(86) International application number:
PCT/CN2022/106403
(87) International publication number:
WO 2024/016146 (25.01.2024 Gazette 2024/04)
(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

(71) Applicant: Huawei Technologies Co., Ltd.
Shenzhen, Guangdong 518129 (CN)

(72) Inventors:
  • HARADA, Yosuke
    Tokyo 108-0075 (JP)
  • OURA, Takao
    Tokyo 108-0075 (JP)
  • TSUNODA, Naotaka
    Tokyo 108-0075 (JP)
  • LI, Xiansheng
    Shenzhen, Guangdong 518129 (CN)

(74) Representative: Eisenführ Speiser 
Patentanwälte Rechtsanwälte PartGmbB Gollierstraße 4
80339 München
80339 München (DE)

   


(54) DRIVING CIRCUIT AND METHOD FOR DRIVING CAPACITIVE LOAD, AND SPEAKER DEVICE AND ELECTRONIC DEVICE INCLUDING DRIVING CIRCUIT