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公开(公告)号：US20170098966A1
公开(公告)日：2017-04-06
申请号：US15279323
申请日：2016-09-28
Applicant: Broadcom Corporation
Inventor： John Stuart WALLEY , Ryan Michael DESROSIERS , Vadim BISHTEIN
CPC classification number: H02J50/10 , H01F38/14 , H02M3/155 , H02M7/219 , H02M2001/007
Abstract: A wireless power transfer (WPT) receiver circuit includes a receive coil to couple to a transmit coil of a WPT transmitter circuit. A rectifier is coupled to the receive coil to generate a rectified voltage. The rectifier comprises a bridge rectifier circuit including a first set of switching elements. A load modulation circuit facilitates communication between the WPT receiver circuit and the WPT transmitter circuit. The load modulation circuit includes a single modulation capacitor and one or more modulation switching elements. At least one node of one of the modulation switching elements is connected to an input node of the rectifier.
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公开(公告)号：US20170098962A1
公开(公告)日：2017-04-06
申请号：US15233859
申请日：2016-08-10
Applicant: Broadcom Corporation
Inventor： Ryan Michael DESROSIERS
CPC classification number: H02J50/12 , H02J7/025 , H02M1/08 , H02M1/36 , H02M3/158 , H02M3/33592 , H02M2001/0006 , H02M2001/0045 , H02M2001/0054 , H02M2001/0058 , H02M2001/007 , H02M2001/008 , Y02B70/1475 , Y02B70/1491
Abstract: A device and circuits are provided for wireless power transfer (WPT) gate-drive power reduction. A WPT receiver circuit includes a receive coil to couple to a transmit coil of a WPT transmitter circuit. A rectification circuit is coupled to the receive coil to generate a rectified voltage. The rectification circuit is a bridge rectifier circuit including a first set of field-effect transistors (FETs). One or more gate-drive control circuits improve power dissipation of the rectification circuit by controlling drive voltages of gate terminals of the first set of FET switches after start-up of the WPT receiver circuit.
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