Invention Grant
- Patent Title: Load modulating regulator for a near filed communication device
- Patent Title (中): 用于近场通信设备的负载调制调节器
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Application No.: US13093740Application Date: 2011-04-25
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Publication No.: US09026046B2Publication Date: 2015-05-05
- Inventor: Alastair Lefley
- Applicant: Alastair Lefley
- Applicant Address: US CA Irvine
- Assignee: Broadcom Corporation
- Current Assignee: Broadcom Corporation
- Current Assignee Address: US CA Irvine
- Agency: Sterne, Kessler, Goldstein & Fox, P.L.L.C.
- Priority: GB1006830.2 20100423
- Main IPC: H04B5/00
- IPC: H04B5/00 ; H02J17/00

Abstract:
A near field communications (NFC) device is disclosed that load modulates and regulates a radio frequency (RF) signal. The NFC device includes a rectifier that rectifies the RF signal to provide a direct current voltage. The NFC device also includes a modulator that modulates a data signal. The modulator provides a first voltage when the data signal is at a first level and provides a second voltage when the data signal is at a second level. The NFC device utilizes a regulator to regulate and to load modulate the RF signal. The regulator adjusts an impedance based upon a comparison of the DC voltage provided by the regulator to the first voltage provided by the modulator for the data signal at the first level or to the second voltage provided by the modulator for the data signal at the second level.
Public/Granted literature
- US20110300798A1 Derivation of a clock signal in a near field communication device Public/Granted day:2011-12-08
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