Title :
A wireless power telemetry with self-calibrated resonant frequency
Author :
Huang, Wei-Jen ; Chen, Chein-Lung ; Liu, Shen-Iuan
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
A wireless power telemetry with self-calibrated resonant frequency is presented. The proposed calibration scheme adjusts the resonant frequency of inductively secondary coil to match the incident frequency of inductively primary coil. To adjust the resonant frequency of the secondary coil, the received power efficiency is improved. By experimented results, the overall power efficiency with frequency calibration is improved by a factor of 33%, compared with that one without frequency calibration. This wireless power telemetry has been fabricated in a standard 0.35 mum CMOS process, and the chip area is 1.536 mm2 including I/O pads.
Keywords :
CMOS integrated circuits; calibration; coils; frequency measurement; radiotelemetry; CMOS I/O pads; CMOS process fabrication; frequency calibration; inductive primary coil; secondary coil resonant frequency; self-calibrated resonant frequency; size 0.35 mum; wireless power telemetry; CMOS logic circuits; Calibration; Capacitors; Coils; Coupling circuits; Rectifiers; Resonant frequency; Telemetry; Voltage; Wireless sensor networks;
Conference_Titel :
VLSI Design, Automation and Test, 2009. VLSI-DAT '09. International Symposium on
Conference_Location :
Hsinchu
Print_ISBN :
978-1-4244-2781-9
Electronic_ISBN :
978-1-4244-2782-6
DOI :
10.1109/VDAT.2009.5158100
