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An original and modern integrated current sensor is designed and presented in this paper. It can provide a sense current proportional to an output current available to the microcontroller via an external resistor. The ratio between output and sense current is modeled and simulated. The errors between the two currents increase in low currents domain. A solution consisting in a gate back regulation...
A novel current mirror sensing based multi-phase current balance developed in Global Foundry 0.18μm CMOS process was presented in this paper. Different from conventional current mirror sensing method, a new bypass branch was added to make the sample signal more accurate in high switching frequency situation. The method was realized in a 2.5MHz four-phase buck converter. As the simulation result shows,...
In this paper, a simple and accurate circuit for interfacing differential resistive sensors is presented. The realization method employs three operational conveyors as active elements to provide voltage output linearly proportional to sensing resistance change. The performance is confirmed through PSPICE simulation and experimental results.
A simulator is developed to estimate the electrical conductivity of polymer/nanotube composite layers as well as the change in their resistances under an applied strain. Simulation results are verified using experimental data on SU-8/Multiwall Carbon NanoTube composites. The model is based on conduction through a polymer body due to percolation between the conductive nanotubes. The simulator predicts...
A fold-back current-limit circuit, with load-insensitive quiescent current characteristic for CMOS low dropout regulator (LDO), is proposed in this paper. This method has been designed in 0.35 mum CMOS technology and verified by Hspice simulation. The quiescent current of the LDO is 5.7 mA at 100-mA load condition. It is only 2.2% more than it in no-load condition, 5.58 mA. The maximum current limit...
This paper introduces a novel current sense amplifier (CSA) in sub-32nm fully depleted (FD) double-gate (DG) silicon-on-insulator (SOI) technology with planar independent self-aligned gates. A new architecture is proposed which takes advantage of the back gate in order to improve circuit properties. Compared to the reference circuit, the new architecture proves to be faster (21% sensing delay decrease),...
This paper is concerned with the design and simulation of a pulse width modulation (PWM) rectifier for three-phase Permanent Magnetic motor drive. Based on the mathematical model of PWM rectifier, the dual-close-loop engineering design with decoupled feed-forward control is applied in the 3-phase voltage source rectifier. The objective to be reached is to realize unity power factor at the input ac...
An integrated CMOS current-sensing circuit suitable for current-sensing of boost converters is presented in this paper. The simulation results verify the validity and the current-sensing accuracy of the proposed circuit. For the purpose of power saving, the supply voltage of the proposed circuit can be reduced by varying the device parameters.
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