公开(公告)号：US10348130B2

公开(公告)日：2019-07-09

申请号：US15221363

申请日：2016-07-27

Applicant: NXP B.V.

Inventor： Harald Helfried Robert

IPC: G05F5/00 ,  H01Q1/22 ,  H02J50/10 ,  H02M7/06 ,  H04B5/00 ,  H02J7/02

Abstract: Disclosed is a circuit apparatus including an input section configured to receive an electromagnetic (EM) transmission, a voltage divider section configured to divide the EM transmission into a plurality of voltage levels, a rectifier portion configured to rectify AC power received in the EM transmission, and a load configured to receive DC power from the rectifier portion, wherein one level of the voltage divider section is configured to supply power to a radio frequency identification integrated circuit (RFID-IC).

公开(公告)号：US10317504B1

公开(公告)日：2019-06-11

申请号：US15838570

申请日：2017-12-12

Applicant: NXP B.V.

Inventor： David Knabl ,  Harald Helfried Robert

IPC: G01S3/14 ,  H01Q1/22 ,  G01S13/75 ,  G01S13/76

Abstract: Embodiments of a radio frequency identification (RFID) reader are provided herein, which include an RFID interrogator; a detection surface for a game piece, the detection surface comprising a plurality of reader antennas in a geometric arrangement; and antenna switching circuitry coupled between the RFID interrogator and the plurality of reader antennas; wherein the antenna switching circuitry is configured to consecutively activate each one of the plurality of reader antennas for at least a detection time window, and wherein the RFID interrogator is configured to: for each reader antenna, detect whether a response signal is received by the reader antenna during the detection time window, and determine a geometric orientation of the game piece based on a subset of reader antennas that received the response signal.