1. Institute of High Performance Computing, A*STAR,Dept. of Electronics & Photonics,Singapore
2. Institute of Microelectronics, A*STAR,Dept. of Sensors, Actuators, and Microsystems,Singapore
3. Institute of Microelectronics, A*STAR,Dept. of IC design,Singapore
4. School of Electrical and Computer Engineering, Cornell University,Ithaca,New York,USA