Performance Analysis of Adiabatic Logic Gate Circuits Using 4T Dram Cells
Total Page:16
File Type:pdf, Size:1020Kb
PERFORMANCE ANALYSIS OF ADIABATIC LOGIC GATE CIRCUITS USING 4T DRAM CELLS by ANUPRIYA KRISHNAMOORTHY A THESIS Submitted in partial fulfillment of the requirements for the degree of Master of Science in Engineering in The Department of Electrical and Computer Engineering to The School of Graduate Studies of The University of Alabama in Huntsville HUNTSVILLE, ALABAMA 2016 iii iv ACKNOWLEDGEMENTS This thesis could not be completed without the assistance of several people who deserve special mention. First, I would like to thank Dr. Fat Duen Ho for his guidance throughout all the stages of the work. Second the members of my committee, Dr. David Wendi Pan and Dr. Jia Li, who have been helpful with comments and suggestions. I would like to thank my family especially my parents Krishnamoorthy Vanchinathan(Father), Umamaheswari Jagadeesan (Mother) and my elder sibling Abinaya Krishnamoorthy (Sister) and my friend Ashish Ramesh, for tolerating me through the whole process. v TABLE OF CONTENTS Page List of Figures ............................................................................................................................................ viii List of Symbols ............................................................................................................................................ xi 1. INTRODUCTION AND BACKGROUND 1.1 Overview ................................................................................................................................... 1 1.2 Tank Oscillator Operation ......................................................................................................... 6 2. LITERATURE REVIEW ................................................................................................................ 8 2.1 Static Random Access Memory .............................................................................................. 10 2.2 1T1C DRAM Cell .................................................................................................................. 12 2.3 4T DRAM Cell ....................................................................................................................... 13 2.4 3T DRAM Cell ......................................................................................................................... 14 2.5 3T1D DRAM Cell ................................................................................................................... 16 3. RESEARCH STATEMENT ................................................................................................................. 18 4. ADIABATIC GATES AND POWER CONSUMPTION .................................................................... 19 4.1 Adiabatic Cells ........................................................................................................................... 19 4.1.1 Gates using LTSpice ................................................................................................................... 20 4.1.1.1 Not Adiabatic Cell ............................................................................................................ 20 4.1.1.2 NOR-OR Adiabatic Cell ................................................................................................... 23 4.1.1.3 NAND-AND Adiabatic Cell ............................................................................................. 25 4.1.1.4 XNOR-XOR Adiabatic Cell ............................................................................................. 27 4.2 Gates using PSPICE ........................................................................................................................... 29 4.2.1. Not Adiabatic Cell .............................................................................................................. 29 vi 4.2.2 NOR-OR Adiabatic Cell ...................................................................................................... 31 4.2.3 NAND-AND Adiabatic Cell ................................................................................................ 33 4.2.4 XNOR-XOR Adiabatic Cell ............................................................................................ 36 4.3 Gate Power Consumption ................................................................................................................... 38 4.4 Power Clock Power Consumption. ..................................................................................................... 44 5.ADIABATIC GATES (L=45NM & L=22NM ) 5.1 Adiabatic Cells (L=45nm) ....................................................................................................... 49 5.1.1 Not- Adiabatic Cell .............................................................................................................. 50 5.1.2 NOR-OR Adiabatic Cell ...................................................................................................... 52 5.1.3 NAND-AND Adiabatic Cell ................................................................................................ 55 5.1.4 XNOR-XOR Adiabatic Cell ................................................................................................ 57 5.2 Adiabatic Cells (L=22nm) ....................................................................................................... 59 5.2.1 Not- Adiabatic Cell .............................................................................................................. 60 5.2.2 NOR-OR Adiabatic Cell ...................................................................................................... 62 5.2.3 NAND-AND Adiabatic Cell ................................................................................................ 65 5.2.4 XNOR-XOR Adiabatic Cell ................................................................................................ 67 5.3 Power Clock-Power Consumption .......................................................................................... 69 6. POWER CLOCK FOR SMALLER TRANSISTORS ......................................................................... 74 6.1 Input Power clock for Smaller Transistors .............................................................................. 74 6.2 High Speed Comparator for Smaller Transistors .................................................................... 76 7. CONCLUSIONS .................................................................................................................................. 78 7.1 Suggestions for further research .............................................................................................. 79 APPENDIX A: 180nm Transistor models LT Spice .................................................................................. 80 APPENDIX B: 45nm Transistor models LT Spice .................................................................................... 83 vii APPENDIX C: 22nm Transistor models LT Spice .................................................................................... 88 APPENDIX D: Transistor Models PSPICE ................................................................................................ 93 APPENDIX E: BSIM4v4.7 MOSFET Model ............................................................................................ 94 REFERENCES ......................................................................................................................................... 106 viii LIST OF FIGURES Figure Page 1.1 CMOS vs ADIABATIC MODEL ................................................................................................ 3 1.2 Adiabatic RC Model ................................................................................................................... 4 1.3 Tank Oscillator .......................................................................................................................... 6 2.1 Schematic 6T SRAM ............................................................................................................... 11 2.2 Schematic 1T1C DRAM Cell .................................................................................................. 13 2.3 4T DRAM Cell ........................................................................................................................ 14 2.4 3T DRAM Cell ........................................................................................................................ 16 2.5 3T1D DRAM Cell ................................................................................................................... 17 4.1 Not Adiabatic Cell(L=180nm) ................................................................................................ 21 4.2 Not Input (L=180nm) .............................................................................................................. 22 4.3 Not Output (L=180nm). .......................................................................................................... 22 4.4 NOR-OR Adiabatic Cell (L=180nm) ...................................................................................... 23 4.5 NOR-OR Inputs(L=180nm) .................................................................................................... 24 4.6 NOR-OR Output(L=180nm) ................................................................................................... 24 4.7 NAND-AND Adiabatic Cell (L=180nm) ................................................................................ 25 4.8 NAND-AND Inputs(L=180nm) .............................................................................................