Title:
WIRELESS POWER TRANSMISSION DEVICE COMPRISING IMPEDANCE MATCHING CIRCUIT, AND WIRELESS POWER TRANSMISSION METHOD
Document Type and Number:
WIPO Patent Application WO/2024/043475
Kind Code:
A1
Abstract:
According to embodiments, a wireless power transmission device may comprise: a power source; a first power amplifier configured to provide a first radio frequency (RF) signal on the basis of a driving voltage provided from the power source; a transmission coil used to transmit power to the outside on the basis of the first RF signal; a matching circuit for providing impedance matching between the transmission coil and the first power amplifier; and a bias circuit configured to provide a bias voltage to the matching circuit. An input terminal of the bias circuit may be connected to a first terminal of a first transistor included in the first power amplifier. An output terminal of the bias circuit may be connected to a second terminal of a second transistor included in the matching circuit. The bias circuit may be configured to provide the bias voltage to the second terminal of the second transistor on the basis of the first RF signal from the first terminal of the first transistor.
Inventors:
GU BEOMWOO (KR)
PARK JAESEOK (KR)
PARK JAEHYUN (KR)
BYUN KANGHO (KR)
YEO SUNGKU (KR)
PARK JAESEOK (KR)
PARK JAEHYUN (KR)
BYUN KANGHO (KR)
YEO SUNGKU (KR)
Application Number:
PCT/KR2023/008785
Publication Date:
February 29, 2024
Filing Date:
June 23, 2023
Export Citation:
Assignee:
SAMSUNG ELECTRONICS CO LTD (KR)
International Classes:
H02J50/12; G05F1/56; H02H9/04; H02M1/00; H02M3/07; H03H7/38
Foreign References:
| KR20150090222A | 2015-08-05 | |||
| KR20140106077A | 2014-09-03 | |||
| KR20120128099A | 2012-11-26 | |||
| US20150194811A1 | 2015-07-09 | |||
| US20150051750A1 | 2015-02-19 |
Attorney, Agent or Firm:
LEE, Keon-Joo et al. (KR)
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