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:
Jun. 22, 2021
Filed:
May. 16, 2018
Apple Inc., Cupertino, CA (US);
Liang Chen, Auckland, NZ;
Andrew Gray, Auckland, NZ;
Arunim Kumar, Auckland, NZ;
Zachary Strachan Harris, Auckland, NZ;
Antoin J. Russell, Cupertino, CA (US);
Bharat K. Patel, San Jose, CA (US);
Saining Ren, Auckland, NZ;
Jerald Polestico Guillermo, Auckland, NZ;
Ron Rafer Floresca, Auckland, NZ;
Apple Inc., Cupertino, CA (US);
Abstract
A wireless power transmitting device transmits wireless power signals to a wireless power receiving device using an output circuit that includes a wireless power transmitting coil. Measurement circuitry is coupled to the output circuit to help determine whether the wireless power receiving device is present and ready to accept transmission of wireless power. Oscillator circuitry for supplying signals to the output circuitry while making measurements with the measurement circuitry is coupled to the output circuit using an impedance injection network. The impedance injection network includes an inductor and a resistor coupled in series. Control circuitry opens a transistor in the output circuit when making measurements with the measurement circuitry and closes the transistor when transmitting the wireless power signals.