Chapter 6 Conclusion and Future Work
6.2 Future Work
System heterogeneity offered by 3D integration usually requires different supply voltages for different function blocks, ranging from high (3.3V or higher) to ultra-low (sub-threshold operation) voltages. The multiple voltages requirement can be achieved by adopting the proposed DVFS system, shown in Fig. 6.1. The first layer signal TSVs are connected to clock source. The clock signal passes through TSVs to the different layers. In each layer, the proposed DLL-based clock generator produces the multiple frequency to meet each layer requirement. The clock drivers are followed by the proposed duty cycle corrector. The proposed level converters or level converting flip-flops are inserted between the different voltage domain.
103
DLL
ref-clk CDR CDR
DLL-based clock generator
DVFS system Level converter/
Level converting flip-flop
V1
V2
Duty cycle corrector
Figure 6.1. 3DIC application.
104
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Vita
陳美維 Mei-Wei Chen
PERSONAL INFORMATION
Birth Date: January 13, 1986 Birth Place: Tainan, TAIWAN
E-Mail Address: waverly.ee95@gamil.com
EDUCATION
09/2010 – 09/2012 M.S. in Electronics Engineering, National Chiao Tung University Thesis: Design of multiphase clocking and level conversion for ULV DVFS systems
09/2006 – 06/2010 B.S. in Electronics Engineering, National Chiao Tung University
PUBLICATIONS
Ming-Hung Chang, Chung-Ying Hsieh, Mei-Wei Chen, and Wei Hwang,
"Logical Effort models with voltage and temperature extensions in super-/near-/sub-threshold regions," IEEE International Symposium on VLSI Design, Automation and Test (VLSI-DAT), pp.1-4, April 2011.
Ming-Hung Chang, Chung-Ying Hsieh, Mei-Wei Chen, and Wei Hwang,
"Near-/sub-threshold DLL-based clock generator with PVT-aware locking range compensation," IEEE International Symposium on Low Power Electronics and Design (ISLPED) , pp.15-20, Aug. 2011.
Mei-Wei Chen, Ming-Hung Chang, Yuan-Hua Chu, and Wei-Hwang, "An Energy-Efficient Level Converter with High Thermal Variation Immunity for Sub-threshold to Super-threshold Operation" IEEE International Conference System-on-Chip (SOCC), Sep. 2012. (accepted)