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. 04, 2020
Filed:
Oct. 10, 2017
Oscillation maintenance circuit with trigger-based pulse generation in half-duplex rfid transponders
Excelio Technology (Shenzhen) Co., Ltd., Shenzhen, CN;
Wuxi Excelio Technology Co., Ltd., Wuxi, CN;
EXCELIO TECHNOLOGY (SHENZHEN) CO., LTD., Shenzhen, CN;
Abstract
A half-duplex RFID oscillation maintenance circuit with trigger-based pulse generation is provided, including: a resonance inductor and a resonance capacitor forming an L-C resonance circuit coupled to an external radio frequency field to generate alternating current for a rectifier circuit, which is connected to an energy-storage capacitor. A first antenna end is connected to a trigger circuit through a switch unit and a resistor connected in series; and an output end of the trigger circuit is connected to a control end of the switch unit. The trigger circuit is configured to sample an oscillation signal at the first antenna end to generate a rectangular wave signal, whose pulse width can be self-adaptively adjusted, to control OFF/ON of the switch unit and, when the switch unit is ON, to form a current injection loop from the energy-storage capacitor to the L-C resonance circuit.