Performance and Reliability Comparison Between Asymmetric and Symmetric LDD Devices and Logic Gates - Solid-State Circuits, IEEE Journal of
نویسندگان
چکیده
The performance and reliability of NMOSFET asymmetric lightly doped drain (LDD) devices (with no LDD on the source side) are compared with those of conventional LDD devices. At a fixed Vdd; asymmetric LDD devices exhibit higher Idsat and shorter hot-carrier lifetime. To maintain the same hot-carrier lifetime, asymmetric LDD devices must operate at lower Vdd while higher Idsat is retained. For the same hot-carrier lifetime, ring oscillators with NMOSFET asymmetric LDD devices can achieve 5% (10% if PMOSFET also had asymmetric LDD) higher speed and 10% lower power. The hot-carrier reliability of inverter, NAND, and NOR structures with asymmetric and conventional LDD devices is also simulated and compared.
منابع مشابه
A Design Methodology for Reliable MRF-Based Logic Gates
Probabilistic-based methods have been used for designing noise tolerant circuits recently. In these methods, however, there is not any reliability mechanism that is essential for nanometer digital VLSI circuits. In this paper, we propose a novel method for designing reliable probabilistic-based logic gates. The advantage of the proposed method in comparison with previous probabilistic-based met...
متن کامل0.35- m Asymmetric and Symmetric LDD Device Comparison Using a Reliability/Speed/Power Methodology
The reliability and performance of NMOSFET asymmetric LDD devices (with no LDD on the source side) are compared with that of conventional LDD devices. The results show that asymmetric LDD devices exhibit higher Idsat and larger Isub . To maintain the same hot-carrier lifetime, asymmetric LDD devices must operate at lower Vdd . For the same hot-carrier lifetime, we show that ring oscillators wit...
متن کاملLow Delay Time All Optical NAND, XNOR and OR Logic Gates Based on 2D Photonic Crystal Structure
Background and Objectives: Recently, photonic crystals have been considered as the basic structures for the realization of various optical devices for high speed optical communication. Methods: In this research, two dimensional photonic crystals are used for designing all optical logic gates. A photonic crystal structure with a triangular lattice is proposed for making NAND, XNOR, and OR optica...
متن کاملA Minimal-Cost Inherent-Feedback Approach for Low-Power MRF-Based Logic Gates
The Markov random field (MRF) theory has been accepted as a highly effective framework for designing noise-tolerant nanometer digital VLSI circuits. In MRF-based design, proper feedback lines are used to control noise and keep the circuits in their valid states. However, this methodology has encountered two major problems that have limited the application of highly noise immune MRF-based circui...
متن کاملEfficient Delay Characterization Method to Obtain the Output Waveform of Logic Gates Considering Glitches
Accurate delay calculation of circuit gates is very important in timing analysis of digital circuits. Waveform shapes on the input ports of logic gates should be considered, in the characterization phase of delay calculation, to obtain accurate gate delay values. Glitches and their temporal effect on circuit gate delays should be taken into account for this purpose. However, the explosive numbe...
متن کامل