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. 13, 2016
Filed:
Apr. 21, 2015
Renesas Electronics Corporation, Kawasaki-shi, Kanagawa, JP;
Takefumi Endo, Kawasaki, JP;
Masanori Kayama, Kawasaki, JP;
Renesas Electronics Corporation, Kanagawa, JP;
Abstract
To satisfy the NFC communication standard in wireless charging with a shared antenna, used for NFC communication. A power supply unit includes a voltage step-down circuit, a charge control circuit, and a communication controller power supply circuit. The voltage step-down circuit includes a switching regulator, and a selection circuitandwhich can select an output path PTof the switching regulator and a bypass path PTof the switching regulator. The voltage step-down circuit includes a selection control circuit. The selection control circuit supplies voltage to the communication controller power supply circuit via the bypass path at the time of activating the communication controller. Since the output voltage of the series regulator stabilizes in a shorter time than the switching regulator, it becomes possible to keep the time from when RF power rises to when initial communication becomes possible, within standards.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile