The demand for building ultra low power circuit emerges as a challenge in recent years. This demand is due to the fast growth in battery operated wearable computing systems and implantable medical instruments. The design challenges in such systems are; low sensitivity to supply voltage variation and independence in performance with respect to power supply. Furthermore, these challenges are to b...

Features: ¡ The single chip solution integrating power transistors and control circuits by C/DMOS process capable of built-in low on-resistance DMOS output transistors. ¡ Low power consumption by CMOS analog circuits. ¡ Wide range of applications for various power supply configurations such as synchronous rectification, switching polarity of drive transistors, etc. ¡ Wide variety of packages me...

In this paper, an adaptive control strategy is proposed for the inverters of renewable energy source (RES) to simultaneously control the load voltage, grid current and the amount of instantaneous injected power to the grid in the presence of grid voltage distortions and nonlinearity of load current. In the proposed control strategy, the power quality of the local load can be settled based on th...

Voltage instability is a major concern in operation of power systems and it is well known that voltage instability and collapse have led to blackout or abnormally low voltages in a significant part of the power system. Consequently, tracking the proximity of the power system to an insecure voltage condition has become an important element of any protection and control scheme. The expected time ...

Processors supporting a wide range of supply voltages are necessary to achieve high performance in nominal supply voltage and to reduce the power consumption in low supply voltage. However, when the supply voltage is lowered below the safe margin (especially close to the threshold voltage level), the memory cell failure rate increases drastically. Thus, it is essential to provide reliability so...

in methods presented to calculate the voltage collapse point, the transmission system is usually the only part of the power system that is completely modeled. distribution systems are often replaced by aggregate load models because the use of the detailed model of distribution systems in voltage stability analysis not only increases the computation time, but also decreases the probability of co...

We propose novel multicore architecture in which dual processors (positive-true processor element and negativetrue processor element: pPE and nPE) can be combined and serve as a low-voltage/high-performance single PE. The coupling processor occupies a double area, but it operates at a lower voltage or faster than the original processor. The proposed scheme is suitable to voltage scaling on mult...

This paper proposes a design of voltage sensor with new controllable delay element (CDE) having high linearity and high resolution. The proposed CDE uses power supply node to measure the voltage value. However, the delay increases exponentially at low voltage level. In this paper we add a PMOS header in parallel with the conventional CDE to compensate the delay degradation at lower voltage. We ...

This paper presents a real-time OS based on μITRON using proposed voltage scheduling algorithm for variable voltage processors which can vary supply voltage dynamically. The proposed voltage scheduling algorithms assign voltage level for each task dynamically in order to minimize energy consumption under timing constraints. Using the presented real-time OS, running tasks with low supply voltage...

Dynamic CMOS logic circuits are used in high performance VLSI chips in order to achieve very high system performance. These circuits requires less number of transistors as compare to CMOS logic circuits Dynamic logic circuits are much affected by noise as compared to static CMOS circuit. This is due to the fact that dynamic logic circuits have lower value of switching threshold voltage, which i...