Title :
Simultaneous 6-Gb/s Data and 10-mW Power Transmission Using Nested Clover Coils for Noncontact Memory Card
Author :
Radecki, Andrzej ; Yuan, Yuxiang ; Miura, Noriyuki ; Aikawa, Iori ; Take, Yasuhiro ; Ishikuro, Hiroki ; Kuroda, Tadahiro
Author_Institution :
Dept. of Electron. & Electr. Eng., Keio Univ., Yokohama, Japan
Abstract :
An inductive power and data transmission link for a noncontact memory card interface is reported. Nested clover coils improve signal-to-interference ratio and enable simultaneous power and data transmission. This capability is then used in the design of a closed-loop feedback system for improving power transfer efficiency. Interference cancellation mechanism is analyzed with both 3-D EM simulations and a newly developed compact model of coupled inductors. Performance of the proposed solutions was confirmed experimentally using a scaled-down stacked-chip prototype fabricated in a 65-nm CMOS process. Maximum data transmission rate is 6 Gb/s and the total power transfer efficiency is 5.2%-10.2% over a load resistance range of 0.1-2 kΩ.
Keywords :
CMOS memory circuits; closed loop systems; coils; feedback; inductive power transmission; interference suppression; memory cards; 3D EM simulations; CMOS process; bit rate 6 Gbit/s; closed-loop feedback system; data transmission link; inductive power; interference cancellation mechanism; nested clover coils; noncontact memory card interface; power 10 mW; power transfer efficiency; power transmission; scaled-down stacked-chip prototype; signal-to-interference ratio; Analytical models; Coils; Data communication; Inductors; Power transmission; Receivers; Solid modeling; Analytical models; data communication; electromagnetic modeling; inductive power transmission; nonvolatile memory; power system stability;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2012.2204545
