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The beamforming allowing the angle control for transmitted and received signals, is one of the most important challenge for the next generation of radio communication systems. Indeed a key point for the development of radio communication systems is to propose an electronic system associated with an antenna array architecture able to orientate the communications in the best direction. For this, magnitude...
This paper presents the design and simulation of an inductive degeneration low noise amplifier (LNA) for impulsionel radio ultra wide band receiver for biomedical implant. Several techniques was used in this study to improve the LNA features for the [1,5]GHz frequency band. The most important are the use of the diode connected load, the degeneration source and the cascode design. A fully integrated...
This paper mainly focuses on performances optimization and analysis of micro power ring oscillator for energy scavenging applications in wireless sensor networks. A novel method of optimizing electrical performances (power, frequency) and geometry (transistors sizing) for CMOS ring oscillators is presented using the contour Graph method. The optimized oscillator exhibits a tuning range from 10 MHz...
This paper mainly focuses on model of photovoltaic cell for energy harvesting application (EHV). This model is developed using the standard simulation software LTspice to explore the effect of electrical and physical parameters on Current-Voltage (I-V) and Power-Voltage (P-V) characteristics of photovoltaic cell (PV). The proposed model is based on mathematical equations and is described through an...
In this paper a solution of the well-known silicon area/performance dilemma and an energy harvesting circuit for wireless sensor nodes are presented. A PSO-based integrated circuit area optimization methodology is proposed. The study is performed on a charge pump circuit, using a 0.35µm Si-CMOS process. The PSO sizing strategy has been implemented using a Spice kernel and Matlab environment. The chip...
This paper proposes a new low-voltage and high performance charge pump circuit suitable for implementation in standard CMOS technologies. The proposed MOS charge pumps is an energy harvesting circuit for wireless sensor. This new pump is an improvement of the basic charge transfer switches (CTS's) to generate higher output voltage. The simulation results show that the proposed circuit have high pumping...
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