In the heart, the rapid propagation and synchronization of action potentials necessary for a normal heart rhythm and an effective cardiac output are mediated by specialized ionic channels that link adjacent cells and are known collectively as gap junctions. Cardiac gap junctions are gated by various physiological and pharmacological agents, but the role of voltage in their gating is unclear. Wh...

In this paper, non-carrier based digital switching functions and patterns are developed using VHDL language (DSFPV).Non-Carrier based switching angle method is selected for the reduced distortion characteristics. Different methods of switching angle methods like equal phase method, half equal phase method, half height method and feed forward method are designed and developed using VHDL coding. ...

This paper presents a novel three-phase power factor corrector (PFC) circuit which uses two power switches working in zero-voltage-switching (ZVS) condition. The two switches along with a high-frequency inductor constitute a high-frequency current source which is responsible for the energy transfer in the circuit. The input current is partly continuous and partly discontinuous. The total harmon...

This paper proposes microarchitecture-driven dynamic voltage scaling as a viable solution to power efficient architectures, with little or no performance penalty. The run-time behavior exhibited by common applications, with active periods, alternated with stall periods due to cache misses, is exploited to reduce the dynamic component of power consumption via selective voltage scaling. As it is ...

Sodium channels in nodal membrane modified by a synthetic analog of batrachotoxin, 7,8-dihydrobatrachotoxinin A-20a-benzoate, were studied under voltage clamp conditions. The voltage dependence of channel activation was shifted by 70—80 mV towards more negative potentials. Selectivity sequence determined from peak current reversal potenial was as follows: Na:NH 4 :K = 1:0.46:0.23. Our data sugg...

Process variations yield the asymmetry on core performance in many-core processors. Adaptive voltage scaling can hide the variations, but that results in the different thermal characteristics of cores. By using the thermal characteristics, the efficiency of energy optimization and temperature management can be improved. Experiments showed that the proposed dynamic voltage frequency scaling cons...

A 1-V operational sigma-delta modulator with a second-order passive switched capacitor filter is designed and fabricated by using a 90 nm CMOS process. No gate-voltage bootstrapped scheme is adopted to drive analog switches, and the voltage gain of a comparator is chosen to be 94 dB. The experimental results show that the peak SNR reached 68.9 dB with a frequency bandwidth of 40 kHz when the cl...

Abstract The ionization region model (IRM) is applied to a high power impulse magnetron sputtering discharge with tungsten target. IRM gives the temporal variation of various species and average electron energy, as well internal parameters such probability back-attraction sputtered species. It shown that an initial peak in current due argon ions bombarding cathode After peak, W + become dominat...

Limited frequency response of impulse voltage dividers contributes to the measurement errors of the peak voltage and time parameters. This paper investigates the convolution method for the determination of the errors of lightning impulse parameters due to non-ideal step responses. The step response of a damped capacitor divider with a voltage rating of 2.2 MV was measured and analytical lightni...