Power efficient design of a novel SRAM cell with higher write ability

The modern high-performance portable communication devices are the key to make the world more inclusive than before. There is a great demand for high-performance SOC inside the high-performance portable devices. According to ITRS and current research, on chip memory technology plays a great role in the SOC performance. Hence enhancing on-chip memory performance will lead to performance enhancement of the device. A novel SRAM cell is designed which reduces the total power consumption by 15.33%. It also increases the write-ability by 63.61% with respect to the conventional 6T-SRAM cell. It blocks the short-circuit current during state transition to reduce the dynamic power consumption. During a write operation, it initiates the feedback loop process for data latching, earlier than the 6T-SRAM cell which increases the write-ability of the proposed cell by a large amount. A thorough analysis about power consumption, write-ability and physical layout design of the proposed cell array is carried out and compared with that of a conventional 6T-SRAM cell array.

[1]  Prakash Kumar Rout,et al.  A novel low power 3T inverter , 2013, 2013 International Conference on Advanced Electronic Systems (ICAES).

[2]  E. Seevinck,et al.  Static-noise margin analysis of MOS SRAM cells , 1987 .

[3]  Aaas News,et al.  Book Reviews , 1893, Buffalo Medical and Surgical Journal.

[4]  A. K. Gupta,et al.  Process variations aware area efficient negative bit-line voltage scheme for improving write ability of SRAM in nanometer technologies , 2012, IET Circuits Devices Syst..

[5]  H. Fujiwara,et al.  An Area-Conscious Low-Voltage-Oriented 8T-SRAM Design under DVS Environment , 2007, 2007 IEEE Symposium on VLSI Circuits.

[6]  W. Dehaene,et al.  Read Stability and Write-Ability Analysis of SRAM Cells for Nanometer Technologies , 2006, IEEE Journal of Solid-State Circuits.

[7]  Jaydeep P. Kulkarni,et al.  Tri-Mode Independent Gate FinFET-Based SRAM With Pass-Gate Feedback: Technology–Circuit Co-Design for Enhanced Cell Stability , 2013, IEEE Transactions on Electron Devices.

[8]  Jan M. Rabaey,et al.  Digital Integrated Circuits , 2003 .

[9]  Ching-Te Chuang,et al.  SRAM Write-Ability Improvement With Transient Negative Bit-Line Voltage , 2011, IEEE Transactions on Very Large Scale Integration (VLSI) Systems.

[10]  Debasish Nayak,et al.  Design of low-leakage and high writable proposed SRAM cell structure , 2014, 2014 International Conference on Electronics and Communication Systems (ICECS).

[11]  M.B. Srinivas,et al.  Analyzing N-Curve Metrics for Sub-Threshold 65nm CMOS SRAM , 2008, 2008 8th IEEE Conference on Nanotechnology.

[12]  T. Karnik,et al.  Read and write circuit assist techniques for improving Vccmin of dense 6T SRAM cell , 2008, 2008 IEEE International Conference on Integrated Circuit Design and Technology and Tutorial.