1. $^{1}$Department of Electrical and Computer Engineering, University of California, Davis, CA, USA
2. Department of Electrical and Computer Engineering, University of California, Davis, CA, USA
3. $^{1}$Department of Electrical and Computer Engineering, University of California, Davis, CA , USA
4. $^{2}$Department of Microelectronics and Information Technology, KTH Royal Institute of Technology, Kista, Sweden
5. Department of Microelectronics and Information Technology, KTH Royal Institute of Technology, Kista, Sweden
6. $^{3}$Multiplex, Inc., South Plainfield, USA
7. Multiplex, Inc. , South Plainfield, NJ, USA