Name
Abstract | ||
|---|---|---|
We present an all-digital bit transistor characterization scheme for CMOS 6T SRAM array. The scheme employs an on-chip operational amplifier feedback loop to measure the individual threshold voltage (VTH) of 6T SRAM bit cell transistors (holding PMOS, pull-down NMOS, and access NMOS) in SRAM cell array environment. The measured voltage is converted to frequency with dual VCO and counter based digital read-out to facilitate data extraction, processing, and statistical analysis. A 512Kb test chip is implemented in 55nm 1P10M Standard Performance (SP) CMOS technology. Monte Carlo simulations indicate that the accuracy of the VTH measurement scheme is about 2-7mV at TT corner across temperature range from 85°C to -45°C, and post-layout simulations show the resolution of the digital read-out scheme is <;60; 0.2mV per bit. Measured VTH distributions agree well with Monte Carlo simulation results. |
Year | DOI | Venue |
|---|---|---|
2012 | 10.1109/ISCAS.2012.6271804 | ISCAS |
Keywords | Field | DocType |
all-digital bit transistor,digital read-out,voltage-controlled oscillators,pull-down nmos,1p10m standard performance cmos technology,monte carlo simulations,individual threshold voltage,statistical analysis,on-chip operational amplifier,operational amplifiers,cmos 6t sram array,sram chips,data processing,access nmos,data extraction,feedback loop,pmos,size 55 nm,post-layout simulations,monte carlo methods,storage capacity 512 kbit,mosfet,dual vco,cmos memory circuits,transistors | NMOS logic,Computer science,Static random-access memory,Electronic engineering,CMOS,PMOS logic,MOSFET,Electrical engineering,Threshold voltage,Operational amplifier,Bit cell | Conference |
ISSN | ISBN | Citations |
0271-4302 | 978-1-4673-0218-0 | 1 |
PageRank | References | Authors |
0.37 | 3 | 10 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Geng-Cing Lin | 1 | 9 | 2.54 |
| Shao-Cheng Wang | 2 | 43 | 5.63 |
| Yi-Wei Lin | 3 | 12 | 3.66 |
| Ming-Chien Tsai | 4 | 87 | 7.34 |
| Ching-Te Chuang | 5 | 465 | 76.52 |
| Shyh-Jye Jou | 6 | 420 | 275.67 |
| Nan-Chun Lien | 7 | 13 | 4.18 |
| Wei-Chiang Shih | 8 | 39 | 4.41 |
| Kuen-Di Lee | 9 | 48 | 6.10 |
| Jyun-Kai Chu | 10 | 2 | 0.74 |