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. 18, 2018
Filed:
Oct. 20, 2017
Excelio Technology (Shenzhen) Co., Ltd, Shenzhen, CN;
Wuxi Excelio Technology Co., Ltd, Wuxi, CN;
EXCELIO TECHNOLOGY (SHENZHEN) CO., LTD., Shenzhen, CN;
WUXI EXCELIO TECHNOLOGY CO., LTD., Wuxi, CN;
Abstract
The present invention discloses a radio-frequency (RF) front-end circuit combining functions of rectification and load modulation and a passive RF tag including thereof. The RF front-end circuit includes a first modulation unit arranged at an output of a rectifier circuit and a second modulation unit arranged between a first and a second end of an antenna coil. The first modulation unit and the second modulation unit are configured to change respectively the voltage at the output of the rectifier circuit and voltage at the two ends of the antenna coil by modulating under a strong field environment or a weak field environment, thus adjusting modulation depth of the passive RF tag. The RF front-end circuit also includes a unidirectional conducting unit to prevent loss of charges stored in a capacitor. The present invention solves existing contradiction of design specification requirements between cost and sensitivity of a passive RF tag.