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:
Dec. 22, 2020
Filed:
Jan. 09, 2018
Apple Inc., Cupertino, CA (US);
Brandon Pierquet, San Francisco, CA (US);
Hunter H. Wu, San Jose, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
Wireless power transmitting equipment has a wireless power transmitter that includes a power converter and a radio-frequency inverter. The radio-frequency inverter may have an output coupled to a transmitting coil circuit formed from a capacitor coupled in series with a wireless power transmitting coil. Feedback information such as information on an output voltage from a rectifier in wireless power receiving equipment is wirelessly transmitted to the wireless power transmitting equipment. Signal phase and amplitude information such as the rectifier output voltage, current measurements in the wireless power receiver, and current and voltage phase and amplitude measurements made using a voltage sensor across the radio-frequency inverter output and a current sensor in series with the transmitting coil circuit may be used by the wireless power transmitting equipment to control the wireless power transmitter and thereby adjust wireless power transmission levels.