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:
Feb. 06, 2024
Filed:
Oct. 12, 2021
Excelio Technology (Shenzhen) Co., Ltd., Shenzhen, CN;
Patrick Bian Wu, Shenzhen, CN;
EXCELIO TECHNOLOGY (SHENZHEN) CO., LTD., Shenzhen, CN;
Abstract
A positive feedback latch amplitude limiting control circuit and method of the passive radio frequency identification tag of the present disclosure dynamically control the voltage between the first and the second antenna terminal. When the voltage between the antenna terminals is too high, the signal generating circuit turns on the discharge circuit, which reduces the rectified DC voltage. When the voltage between the antenna terminals is within the limited voltage, the signal generating circuit turns off the discharge circuit. The discharge circuit in the present disclosure includes a MOS transistor whose gate voltage is indirectly controlled by a latch. A positive feedback mechanism of the latch makes the first control signal Shave a substantially strong strength when being pulled to a low level, such that the discharge path is fully turned off, which avoids a discharge of the MOS transistor being in a sub-threshold region, thereby improving communication performance.