The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 15, 2025
Filed:
Nov. 07, 2023
Richtek Technology Corporation, Hsinchu, TW;
Wei-Shuo Wu, Kaohsiung, TW;
Fu-Chi Lin, Hsinchu, TW;
Richtek Technology Corporation, Hsinchu, TW;
Abstract
A wireless power transmitter circuit includes: an inverter circuit including plural switches coupled to a resonant transmitter circuit; and a transmitter controller circuit for generating a PWM control signal, to control the plural switches, thus generating a wireless transmission power via the resonant transmitter circuit in a power supply procedure, so that a wireless power supply is accordingly provided to a wireless power receiver circuit. In a groping procedure, transmitter controller circuit controls the plural switches to generate a wireless test power via the resonant transmitter circuit based on an operation frequency. The groping procedure includes: measuring a peak of a transmission signal corresponding to the wireless test power; determining, according to the peak of the transmission signal, whether a foreign object exists and/or whether the wireless power receiver circuit is present. When it is determined that the wireless power receiver circuit is present, the power supply procedure is performed.