Ayrat Galisultanov

Elichens

The present paper deals with the analysis of the squeeze film effects in circular capacitive micromachined ultrasound transducers (CMUT) operating in air, with emphasis on improved bandwidth. Firstly, a 1D analytical approach based on parallel plate approximation is recalled. The opposing influences of the electrostatic softening and the squeeze fi...

This paper presents the energy analysis of capacitive adiabatic logic (CAL) based on gap-closing MEMS devices. CAL uses variable capacitance components instead of transistor elements to have a new balance between on-and off-state losses. Ultra-low power consumption in CAL requires an energy efficient way for charging and discharging of the variable...

This paper reports the design, energy recovery and logical functionality modeling of four-terminal microelectromechanical (MEMS) comb-drive devices for capacitive adiabatic logic (CAL). The proposed electromechanical element consists of the moving mass with two insulated electrodes and two fixed electrodes. The two pairs of fixed and moving electro...

We report the first experimental proof of concept of a new electromechanical adiabatic logic family operating without any kind of electrical and mechanical contacts. Based on comb-drive actuators and standard microelectromechanical system (MEMS) microfabrication, we demonstrate the cascadability of logic gates up to 170 °C, and operation in the kil...

A system including first and second electric or electronic circuits galvanically isolated from each other, and a coupling device coupling the first circuit to the second circuit, the coupling device including a variable-capacitance capacitor including first and second electrodes mobile with respect to each other, separated by an insulating region,...

A logic cell including a fixed assembly including a first electrode, a mobile assembly including a second electrode, and third, fourth, and fifth electrodes, wherein: the first, second, third, fourth, and fifth electrodes are insulated from one another; the first and second electrodes define a capacitor variable according to the position of the mob...

This paper reports the study, design, and simulation of a symmetrical comb-drive actuator. The approach for definition of the potential energy of the system is proposed. The electrical parameters of the comb-drive actuator are defined in COMSOL Multiphysics® software. Depending on an actuation voltage and an initial design it can form system with o...

Constant-current charging is the optimal solution for charging linear (fixed) capacitors. In this letter, we extend the principle of constant-current charging to nonlinear capacitors using a variational method. We address the case where the capacitance depends only on the applied voltage. We show that a nonlinear capacitor stores energy electrostat...

This paper presents a novel four-terminal variable capacitor (FTVC) dedicated to the recent concept of low power capacitive adiabatic logic (CAL). This FTVC is based on silicon nano/micro technologies and is intended to achieve adiabatic logic functions with a better efficiency that by using field effect transistor (FET). The proposed FTVC consists...

CMOS technology allows a femto Joule energy dissipation per logic operation, if operated at optimal frequency and voltage. However, this value remains orders of magnitude above the theoretical limit predicted by Lan-dauer. In this work, we present a new paradigm for low power computation, based on variable capacitors. Such components can be impleme...

This paper introduces a new paradigm to implement logic gates based on variable capacitance components instead of transistor elements. Using variable capacitors and Bennett clocking, this new logic family is able to discriminate logic states and cascade combinational logic operations. In order to demonstrate this, we use the capacitive voltage divi...

In this paper we present the measurement results for surface transverse wave (STW) resonators on langasite (0°, 22°, 90°) with aluminum electrodes. This STW cut of langasite provides temperature stable delay of STW with high coupling coefficient and potentially provide better Q-factor than standard SAW resonators, since pure shear vibrations in STW...

Теоретически и экспериментально исследовано влияние атмосферы в росто-вой камере на распределение температуры по длине нитевидных нанокристал-лов. Построена и исследована модель расчета температурного поля, учитыва-ющая теплопроводность, тепловое излучение по закону Стефана−Больцмана и теплообмен с газовой средой. Показано, что эффект охлаждения во...