scholarly journals Resonant 90 degree shifter generator for 4-phase trapezoidal adiabatic logic

2003 ◽  
Vol 1 ◽  
pp. 243-246 ◽  
Author(s):  
A. Bargagli-Stoffi ◽  
E. Amirante ◽  
J. Fischer ◽  
G. Iannaccone ◽  
D. Schmitt-Landsiedel
Keyword(s):  
Cmos Technology ◽  
Power Supplies ◽  
Clock Generator ◽  
Optimum Frequency ◽  
Adiabatic Logic ◽  
Equivalent Load ◽  
Key Aspects ◽  
Multi Phase ◽  
Relationship Of ◽  
Phase Relationships

Abstract. Many adiabatic logic families make use of multi phase trapezoidal or sinusoidal power clocks to recover the energy stored in the load capacitances. A key aspect for the evaluation of the performance of adiabatic logic is then the study of a system that includes the power clock generator. A four-phase trapezoidal power clock generator, according to the requirements of the most promising architectures, namely the ECRL and PFAL, has been designed and simulated. The proposed circuit, realized with a double-well 0.25 µm CMOS technology and external inductors, is a resonant generator designed to oscillate at a frequency of 7 MHz, which is within the optimum frequency range for adiabatic circuits realized with this CMOS technology. The generator has been simulated with the equivalent load of fifty 1-bit adders and the operating behavior of a 4-bit adder has been evaluated. The key aspects of a generator for adiabatic logic are its power consumption and the phase relationships between its output signals. The proposed generator has a conversion efficiency higher than 80%, and it is robust with respect to variations of technology parameters. The four power supplies exhibit the correct relationship of phase also in the presence of no equally distributed loads.

scholarly journals 2.5 Gbps clock data recovery using 1/4th-rate quadricorrelator frequency detector and skew-calibrated multi-phase clock generator

2006 ◽  
Vol 4 ◽  
pp. 287-291
Author(s):  
S. Tontisirin ◽  
R. Tielert
Keyword(s):  
Clock And Data Recovery ◽  
Cmos Technology ◽  
Wide Frequency Range ◽  
Data Recovery ◽  
Voltage Controlled Oscillator ◽  
Clock Generator ◽  
Low Jitter ◽  
Phase Clock ◽  
Multi Phase ◽  
Frequency Detector

Abstract. A Gb/s clock and data recovery (CDR) circuit using 1/4th-rate digital quadricorrelator frequency detector and skew-calibrated multi-phase voltage-controlled oscillator is presented. With 1/4th-rate clock architecture, the coil-free oscillator can have lower operation frequency providing sufficient low-jitter operation. Moreover, it is an inherent 1-to-4 DEMUX. The skew calibration scheme is applied to reduce phase offset in multi-phase clock generator. The CDR with frequency detector can have small loop bandwidth, wide pull-in range and can operate without the need for a local reference clock. This 1/4th-rate CDR is implemented in standard 0.18 μm CMOS technology. It has an active area of 0.7 mm2 and consumes 100 mW at 1.8 V supply. The CDR has low jitter operation in a wide frequency range from 1–2.25 Gb/s. Measurement of Bit-Error Rate is less than 10−12 for 2.25 Gb/s incoming data 27−1 PRBS, jitter peak-to-peak of 0.7 unit interval (UI) modulation at 10 MHz.

TWO-PHASE SINUSOIDAL POWER-CLOCKED QUASI-ADIABATIC LOGIC CIRCUITS

2010 ◽  
Vol 19 (02) ◽  
pp. 335-347 ◽  
Author(s):  
V. S. KANCHANA BHAASKARAN ◽  
J. P. RAINA
Keyword(s):  
Low Frequency ◽  
Cmos Technology ◽  
Logic Circuits ◽  
Wide Frequency Range ◽  
Clock Generator ◽  
Two Phase ◽  
Sense Amplifier ◽  
Adiabatic Logic ◽  
And Performance ◽  
Performance Validation

This paper presents the design and performance analysis of the dual-rail encoded and sense-amplifier structured 2N–2P, 2N–2N2P, IPGL and PFAL quasi-adiabatic circuits operated by two-phase sinusoidal power-clock sources. The energetics of these families are studied for varying power-clock voltages. The drivability characteristics are evaluated using capacitive loads. The performance validation is made through 8-bit and 16-bit adder circuits using an integrated power-clock generator. Optimal adiabatic gain values are achieved for 2N–2N2P and IPGL circuits across a wide frequency range. Energy recovery comparison between the four-phase ramp and two-phase sine power-clocks is made. The results demonstrate the efficiency of sinusoidal power clock at both the high and the low frequency ranges of operation. The circuits were designed using 180 nm CMOS technology.

First-Principle Calculation of Al2O3(012)/SiC(310) Interface Model

2017 ◽  
Vol 896 ◽  
pp. 120-127 ◽  
Author(s):  
Ting Ting Zhou ◽  
Chuan Zhen Huang ◽  
Ming Dong Yi
Keyword(s):  
Grain Boundary ◽  
Population Analysis ◽  
First Principle ◽  
Interface Model ◽  
Electronic Density ◽  
Principle Calculation ◽  
First Principle Calculation ◽  
Multi Phase ◽  
Relationship Of ◽  
Interface Bonding Strength

First-principle calculation is carried out on Al2O3(012)/SiC(310) interface model. It can be concluded from the electronic density and population analysis that Al-C and O-Si located at grain boundary primarily contribute to the interface bonding strength and creep resistance property. The electronic charges in grain boundaries and grains are compared with each other. And the valence electrons are found to be redistributed. The relationship of all kinds of chemical bonds in grains and grain boundary of the interface model is analyzed. Also the toughening mechanism of Al2O3/SiC multi-phase ceramic tool materials is explained in nano-scale.

scholarly journals Precise and pervasive phasic bursting in locus coeruleus during maternal behavior

2021 ◽  
Author(s):  
Roman Dvorkin ◽  
Stephen D. Shea
Keyword(s):  
Social Behavior ◽  
Locus Coeruleus ◽  
Maternal Behavior ◽  
Sensory Stimuli ◽  
Pup Retrieval ◽  
Subsequent Behavior ◽  
Maternal Interaction ◽  
Key Aspects ◽  
Global Brain ◽  
Relationship Of

ABSTRACTThe noradrenergic locus coeruleus (LC) mediates key aspects of arousal, memory, and cognition in structured tasks, but its contribution to natural behavior remains unclear. Neuronal activity in LC is organized into sustained (‘tonic’) firing patterns reflecting global brain states and rapidly fluctuating (‘phasic’) bursts signaling discrete behaviorally significant events. LC’s broad participation in social behavior including maternal behavior is well-established, yet the temporal relationship of its activity to sensory events and behavioral decisions in this context is unknown. Here, we made electrical and optical recordings from LC in female mice during maternal interaction with pups. We find that pup retrieval stably elicits precisely timed and pervasive phasic activation of LC that can’t be attributed to sensory stimuli, motor activity, or reward. Correlation of LC activity with retrieval events shows that phasic events are most closely related to subsequent behavior. We conclude that LC likely drives goal-directed action selection during social behavior with globally-broadcast noradrenaline release.

scholarly journals SEGURIDAD Y JUSTICIA BAJO ACOSO EN TIEMPOS DE VIOLENCIA NEOLIBERAL: las respuestas de la policía comunitaria de guerrero

2013 ◽  
Vol 7 (2) ◽  
pp. 11 ◽  
Author(s):  
Maria Teresa Sierra
Keyword(s):  
Indigenous People ◽  
Indigenous Peoples ◽  
The State ◽  
Community Police ◽  
El Sistema ◽  
The Right ◽  
Key Aspects ◽  
Relationship Of ◽  
The Relationship ◽  
The Eu

La policía comunitaria es una institución de los pueblos indígenas de Guerrero conocida por su capacidad para enfrentar a la delincuencia y generar alternativas de paz social., através de un sistema de justicia y seguridad autónomo. En los últimos años, sin embargo, el sistema comunitario enfrenta el acoso de actores diversos vinculados al incremento de la violencia y la inseguridad que se vive en el país y especialmente en el estado de Guerrero; dicha situación está impactando a la institucionalidad comunitaria, obligando a su redefinición. En este trabajo destaco aspectos centrales de dicha conflictividad así como las respuestas que han dado los comunitarios para hacer frente a las tareas de justicia y seguridad en el marco de nuevos contextos marcados por el despojo neoliberal y la impunidad de actores estatales y no estatales. En este proceso se actualiza la relación de la policía comunitaria con el Estado revelando el peso de la ambigüedad legal y los juegos del poder así como los usos contra-hegemónicos del derecho para disputar la justicia. ---SEGURANÇA E JUSTIÇA SOB ACOSSO EM TEMPOS DE VIOLÊNCIA NEOLIBERAL: respostas do policiamento comunitário de GuerreroO policiamento comunitário é uma instituição dos Povos Indígenas do Guerrero conhecidos por sua capacidade de lidar com o crime e gerar paz social de forma alternativa, usando um sistema próprio de justiça e segurança. Nos últimos anos, no entanto, o sistema da UE enfrenta assédio de várias autoridades envolvidas no aumento da violência e da insegurança que reina no país e, especialmente, no estado de Guerrero; essa situação está afetando as instituições comunitárias, forçando a sua redefinição. Neste artigo, destaco os principais aspectos do conflito e as respostas que têm a comunidade para lidar com as tarefas da justiça e da segurança no contexto dos novos contextos marcados por pilhagem neoliberal e a impunidade de atores estatais e não estatais. Neste processo, a relação de policiamento comunitário com o estado é atualizada, revelando o peso da ambiguidade e dos jogos de poder legais, além de usos contra-hegemônicos do direito de disputar a justiça.Palavras-chave: violência neoliberal; Guerrero; comunidades indígenas---SECURITY AND JUSTICE UNDER HARASSMENT IN TIMES OF NEOLIBERAL VIOLENCE: responses of the Community Police of GuerreroThe community police is an institution of the Indigenous Peoples of Guerrero known for its ability to deal with crime and generate alternatives for social peace, using a system of justice and self security. In recent years, however, the EU system faces harassment from various people responsible for the increase of violence and insecurity within the country and especially in the state in Guerrero; this situation is impacting instituitions in the community, forcing their redefinition. In this paper I highlight key aspects of the conflict and the community's responses to deal with the tasks of justice and security in new contexts marked by neoliberal plunder and impunity of the state (as well as non state figures). In this process, the relationship of the community police with the state is updated revealing the weight of legal ambiguity and power plays, as well as counter-hegemonic use of the right to dispute justice.key words: neoliberal vilence; Guerrero; indigenous people.

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