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:
Nov. 17, 2020
Filed:
Nov. 21, 2018
Apple Inc., Cupertino, CA (US);
Bo Zhou, Santa Clara, CA (US);
Atul A. Salvekar, Oakland, CA (US);
Andrew H. Jones, Redwood City, CA (US);
Brian D. Mariner, San Francisco, CA (US);
Michael F. Jean, San Francisco, CA (US);
Moshe H. Malkin, Menlo Park, CA (US);
Benjamin M. Oztalay, San Francisco, CA (US);
Arash Mehrabi, Cupertino, CA (US);
Jose Santos Martinez, San Jose, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
A wireless power transmitting device transmits wireless power signals to a wireless power receiving device using a wireless power transmitting coil. The wireless power receiving device may transmit data packets to the wireless power transmitting device. The wireless power transmitting device may include a data receiver that is coupled to the wireless power transmitting coil and that receives the transmitted data packets. The data receiver may be configured to demodulate the received data packets. The data packets may include at least preamble bits, start bits, and data bits encoded as biphase half-bit signals in accordance with a predefined wireless power transfer protocol. During demodulation, the receiver may perform preamble detection, start bit detection, and data bit detection by comparing the input signals to corresponding reference patterns using a maximum likelihood sequence detection scheme. Phase recovery may be employed throughout to help provide immunity to phase change.