Abstract
Emerging ubiquitous systems such as distributed sensor networks require ultra-low power consumption. The energy minimum and thus, the lowest possible power consumption of CMOS logic, is achieved in the sub-threshold region.
The exponential dependence of the drain current on threshold voltage variations leads to increased overdesign if sub-threshold circuits are to be robust. Adaptive systems are required to address variability robustness. One approach to achieve adaptivity is timing error detection (TED) within the circuit. Presented here is a TED latch capable of sub-threshold operation. It was designed in 65 nm technology, has an operating voltage range of 0.25 V through 1.2 V, and a minimum energy point (MEP) of 0.4 V. At the MEP, the average power consumption for one clock period and an activity factor of alpha=0.5 is 0.43 nW. The area of the TED latch is 101-um2.
A sub-threshold CORDIC implementation is presented to demonstrate the TED latch at a system level.
The exponential dependence of the drain current on threshold voltage variations leads to increased overdesign if sub-threshold circuits are to be robust. Adaptive systems are required to address variability robustness. One approach to achieve adaptivity is timing error detection (TED) within the circuit. Presented here is a TED latch capable of sub-threshold operation. It was designed in 65 nm technology, has an operating voltage range of 0.25 V through 1.2 V, and a minimum energy point (MEP) of 0.4 V. At the MEP, the average power consumption for one clock period and an activity factor of alpha=0.5 is 0.43 nW. The area of the TED latch is 101-um2.
A sub-threshold CORDIC implementation is presented to demonstrate the TED latch at a system level.
| Original language | English |
|---|---|
| Title of host publication | Proceedings |
| Subtitle of host publication | NASA/ESA Conference on Adaptive Hardware and Systems, AHS 2009 |
| Publisher | IEEE Institute of Electrical and Electronic Engineers |
| Pages | 197-203 |
| ISBN (Print) | 978-0-7695-3714-6 |
| DOIs | |
| Publication status | Published - 2009 |
| MoE publication type | A4 Article in a conference publication |
| Event | NASA/ESA Conference on Adaptive Hardware and Systems, AHS 2009 - San Francisco, CA, United States Duration: 29 Jul 2009 → 1 Aug 2009 |
Conference
| Conference | NASA/ESA Conference on Adaptive Hardware and Systems, AHS 2009 |
|---|---|
| Abbreviated title | AHS 2009 |
| Country/Territory | United States |
| City | San Francisco, CA |
| Period | 29/07/09 → 1/08/09 |