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This paper presents constraints involved in the microelectronic implementation of a transmission line model based on transconductor-capacitor (gm-C) topologies. The presented line model, based on the discretization of a transmission line into a finite number of series inductors and shunt capacitors, is aimed for the fault location in power network, a technique using the Electromagnetic Time-Reversal...
This paper presents a fully integrated solar energy harvester for ultra-low power autonomous microsystems. This area- and power-efficient circuit harvests solar energy from a micro-power photovoltaic module to charge a rechargeable NiMH microbattery. As the harvested solar energy varies considerably in different lighting condition, the proposed circuit scales the power consumption and performance...
This paper investigates noise behavior under low and high drain biases of high-voltage metal–oxide–semiconductor field-effect transistors (MOSFETs) (HV-MOSFETs). A dedicated setup is presented which allows measuring low-frequency (LF) noise of lateral double-diffused MOSFETs (LDMOSFETs) up to 200 V at the drain. LF noise spectra of n- and p-channel LDMOSFETs were measured over a large range...
This paper presents a solar charger ASIC for Li-Ion and Nickel-based (NiCd or NiMH) batteries. The system is a DC/DC converter that operates the solar panel at its maximum power point by tracking it using a hill-climbing algorithm. Only one external inductor and one diode are necessary. The circuit is fabricated in a 0.5μm 5V process. It features a low power consumption of 84μA.
This paper presents an analog temperature compensation principle for capacitive sensor interfaces. For this purpose a voltage reference proportional to a reference voltage (VREF) and to relative temperature (??T) has been designed and integrated in a 1??m CMOS process. The achieved temperature measurement precision is better than 0.5??C over an operating range of 100??C.
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