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788
Logic Circuits Operating in Subthreshold Voltages
"... In this paper different logic circuit families operating in the subthreshold region are analyzed. Their performance in terms of power and speed are of particular interest. The study complements existing work that has reported static CMOS circuit performance under different body biasing schemes in th ..."
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Cited by 1 (0 self)
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at subthreshold as well as above threshold voltages is introduced. The scheme improves a five-stage NAND ring oscillator switching speed 6X better than the static CMOS configuration while dissipating 18%less power. Categories and Subject Descriptors D.3.3 [Low Power High-speed SubthresholdCMOS Design]: Suitable
Subthreshold voltage noise of rat neocortical pyramidal neurones
- J Physiol
, 2005
"... Neurones are noisy elements. Noise arises from both intrinsic and extrinsic sources, and manifests itself as fluctuations in the membrane potential. These fluctuations limit the accuracy of a neurone’s output but have also been suggested to play a computational role. We present a detailed study of t ..."
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Cited by 15 (3 self)
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model reproduces qualitatively these data. Our results imply that ion channel noise contributes significantly to membrane voltage fluctuations at the subthreshold voltage range, and that Na + conductance plays a key role in determining the amplitude of this noise by acting as a voltage
Energy Optimization of Subthreshold-Voltage Sensor Network Processors
"... Sensor network processors and their applications are a growing area of focus in computer system research and design. Inherent to this design space is a reduced processing performance requirement and extremely high energy constraints, such that sensor network processors must execute low-performance t ..."
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-performance tasks for long durations on small energy supplies. In this paper, we demonstrate that subthreshold-voltage circuit design (400 mV and below) lends itself well to the performance and energy demands of sensor network processors. Moreover, we show that the landscape for microarchitectural energy
Characterization of Subthreshold Voltage Fluctuations in Neuronal Membranes
, 2003
"... Synaptic noise due to intense network activity can have a significant impact on the electrophysiological properties of individual neurons. This is the case for the cerebral cortex, where ongoing activity leads to strong barrages of synaptic inputs, which act as the main source of synaptic noise affe ..."
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Cited by 37 (14 self)
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affecting on neuronal dynamics. Here, we characterize the subthreshold behavior of neuronal models in which synaptic noise is represented by either additive or multiplicative noise, described by Ornstein-Uhlenbeck processes. We derive and solve the Fokker-Planck equation for this system, which describes
Comment on: Characterization of subthreshold voltage fluctuations in
, 2008
"... In a recent paper, Rudolph and Destexhe (Neural Comp. 15, 2577-2618, 2003) studied a leaky integrator model (i.e. an RC-circuit) driven by correlated (“colored”) Gaussian conductance noise and Gaussian current noise. They derived an expression for the stationary probability density of the membrane v ..."
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voltage. Here we show by standard analysis of solvable limit cases and by numerical simulations that their result does not hold for the general colored-noise case and uncover the errors made in the derivation of a Fokker-Planck equation for the probability density. 1
Subthreshold Voltage Noise Due to Channel Fluctuations in Active Neuronal Membranes
- JOURNAL OF COMPUTATIONAL NEUROSCIENCE 9, 133–148
, 2000
"... Voltage-gated ion channels in neuronal membranes fluctuate randomly between different conformational states due to thermal agitation. Fluctuations between conducting and nonconducting states give rise to noisy membrane currents and subthreshold voltage fluctuations and may contribute to variability ..."
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Cited by 12 (3 self)
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Voltage-gated ion channels in neuronal membranes fluctuate randomly between different conformational states due to thermal agitation. Fluctuations between conducting and nonconducting states give rise to noisy membrane currents and subthreshold voltage fluctuations and may contribute to variability
PERSISTENT SUBTHRESHOLD VOLTAGE-DEPENDENT CATION SINGLE CHANNELS IN SUPRACHIASMATIC NUCLEUS NEURONS
"... contains the primary circadian pacemaker in mammals, and transmits circadian signals by diurnal modulation of neuronal firing frequency. The ionic mechanisms underlying the circadian regulation of firing frequency are unknown, but may involve changes in membrane potential and voltagegated ion channe ..."
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Cited by 1 (0 self)
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channels. Here we describe novel tetrodotoxin- and nifedipine-resistant subthreshold, voltage-dependent cation (SVC) channels that are active at resting potential of SCN neurons and increase their open probability (P o) with membrane depolarization. The increased P o reflects changes in the kinetics
LETTER Communicated by Peter Thomas Comment on “Characterization of Subthreshold Voltage
"... In two recent articles, Rudolph and Destexhe (2003, 2005) studied a leaky integrator model (an RC-circuit) driven by correlated (“colored”) gaussian conductance noise and Gaussian current noise. In the first article, they derived an expression for the stationary probability density of the membrane v ..."
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voltage; in the second, they modified this expression to cover a larger parameter regime. Here we show by standard analysis of solvable limit cases (white noise limit of additive and multiplicative noise sources; only slow multiplicative noise; only additive noise) and by numerical simulations
Subthreshold Voltage High-k CMOS Devices Have Lowest Energy and High Process Tolerance
"... Abstract — Evolving nanometer CMOS technologies provide low power, high performance and higher levels of integration but suffer from increased subthreshold leakage and excessive process variation. The present work examines the 45nm bulk and high-k technologies. We evaluate the performance of a 32-bi ..."
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Cited by 1 (0 self)
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. The minimum energy per cycle operation occurs at a subthreshold voltage. For minimum energy, the bulk technology has a very low performance (~7 MHz). However, high-k technology works at a much higher 250 MHz clock. Faster clock rate reduces the leakage energy making high-k almost twice as energy efficient
A low-power parallel design of discrete wavelet transform using subthreshold voltage technology
- In CASES ’08: Proceedings of the 2008 international conference on Compilers, architectures
, 2008
"... The Discrete Wavelet Transform (DWT) is a means to ana-lyze the frequency content of a signal and has extensive uses, including the JPEG2000 codec. Many portable and battery operated applications of DWT are expected in the near fu-ture that require a low power implementation of this trans-form. In t ..."
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Cited by 1 (1 self)
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, is 386mV. This is below the threshold voltage, which is the voltage that turns the transistors on. Since oper-ating a circuit in subthreshold voltage consumes 100+ times less power than running it at nominal voltage, our design is able to provide the same throughput as a reference pipelined
Results 1 - 10
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