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Low-Power Clock Recovery Circuit for UHF RFID EPC Class-1 Generation-2 Transponders

Summary

The invention makes the generation of a low frequency error clock source for backscatter link frequency possible. The power consumption of the invention is very low such that the reading distance of a passive transponder is not harmed. Also the clock calibration process continuously conducted in the whole downlink duration to prevent frequency drifting before the backscatter communication. The calibration process does not need any special training sequence. Thus there is no dead time in terms of information flow for interrogator to transponder communication.

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Supplementary Information

Inventor: CHAN, Chi-Fat | PUN, Kong Pang | LEUNG, Ka Nang Alex | CHOY, Chui-Sing Oliver
Priority Number: US20110156871A1
IPC Current: H04B0007005
US Class: 3400101
Assignee Applicant: The Chinese University of Hong Kong
Title: FREQUENCY CALIBRATING
Usefulness: FREQUENCY CALIBRATING
Novelty: Device for calibrating frequency of transponder in radio frequency identification (RFID) system, calibrates frequency of clock signal towards target frequency based on comparison of counted number of clock cycles with reference number

Industry

ICT/Telecom

Sub Group

Telecommunication

Application No.

09/ENG/333/ITF

Others

Inventor(s): Professor Kong-pang PUN, Department of Electronic Engineering

Patent Status: US Patent Pending Licensing Status: Available for licensing

Country/Region

Hong Kong

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