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This paper proposed an analog controller without multiplier to realize the Maximum Power Point Tracking (MPPT) for PV applications based on an improved perturbation and observation (P&O) method. Comparing with traditional analog MPPT controller designs which need a multiplier to calculate the power value to implement P&O, the proposed method only perturbs and observes single variable to get...
Social network plays a fundamental role as a medium for the spread of influence among its individuals. During the influence spreading process, one favorable goal is achieving influence maximization in social marketing. Thus diffusion model which identifies a set of individuals to initiate this spread so that more individuals can be triggered at last is very critical. However, to the best of our knowledge,...
A complete set of analytical gate performance models is developed based on driving current analysis. Closed-form equations for gate delay and output slew are obtained, which capture the dependence on key process and design parameters, such as the input slew, threshold voltage, etc. Using these formulas, gate performance of various topologies is accurately predicted under both nominal and variational...
Optical and electrical parameters of biphasic silicon with different crystalline volume fraction (fc) were estimated via effective medium approximation method and experimental results. Then software AMPS-1D has been performed to investigate the influence of fc on biphasic silicon as the intrinsic layer on the performance of biphasic silicon single-junction and amorphous silicon/biphasic silicon double-junction...
The network loss modification for bidding prices is based on the result of flow calculation, reflecting the change of transmission cost. Meanwhile, it is an important indicator of market fairness. Based on the power distribution theory and the conservation of cost flow, this paper studies the relationship between network loss and transmission cost. It shows that although the network loss remains unchanged,...
Strained Si is implemented into the standard CMOS process to enhance carrier transport properties since the 90 nm technology node. However, due to the non-uniform stress distribution in the channel, the enhancement of carrier mobility and threshold voltage strongly depend on layout parameters, such as channel length (L) and source/drain diffusion length (Lsd). In this work, a compact model that physically...
Electronic ballast requires a high voltage igniter to start up the HID lamps. An improved parallel igniter is proposed in this paper. The basic mechanism of it has been analysed and design principle is developed. Based on this parallel igniter, the lamp series inductor can be optimized separately. This improves the performance of both the igniter and lamp inductor. The simulation and experimental...
Charge equalization is important to reduce the damage and improve the lifetime of the battery. An improved control strategy of the equalization circuit is presented in this paper. The over-equalization technique has been utilized to shorten the equalization time about 25%. The hysteresis control is also been used to improve the robustness of the system. The simulation and prototype experimental results...
Strain technology has been successfully integrated into CMOS fabrication to improve carrier transport properties since 90 nm node. Due to the non-uniform stress distribution in the channel, the enhancement in carrier mobility, velocity, and threshold voltage shift strongly depend on circuit layout, leading to systematic performance variations among transistors. A compact stress model that physically...
Rapid-Thermal Annealing (RTA) with radiation heating is recently adopted in nanoscale CMOS fabrication in order to achieve ultra-shallow junction with maximum dopant activation rate. However, recent results report the systematic shift of threshold voltage (Vth) and increased Vth variation due to RTA process. The exact amount of variations depends on layout pattern density, RTA heating temperature...
A small-signal model for the asymmetrical half bridge flyback converter is presented. The effects of storage elements and peak current mode control on the transfer characteristics are investigated. The results show that the power stage of the studied converter is basically a fourth order system with two low-frequency poles and two high frequency poles. While the peak current mode control is applied,...
Pulse signaling is proposed for on-chip global bus design to reduce dynamic power consumption. To maximize power saving, shorter pulse width and longer propagation length are preferred. In this work, a complete set of analytical models are developed for pulse propagation along RLC lines. These models connect line geometries and electrical properties of an input pulse with several important design...
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