Sylvie Guessab

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This work highlights the facilities of VHDL-AMS to model multi-physical systems and deal with time discontinuities. The modeling and simulation of a piezo-electric device used to spray liquids are presented. Since it is composed of several piezoelectric and metallic parts, a modular approach is proposed. A generic behavioral model for each part type -(More)
This paper presents the design of a monobit 6 th order delta-sigma modulator in a GaAs 0.2 µm technology. The central frequency is 750 MHz and the sampling frequency is 3 GHz. The reached resolution is 10.5 bits over a 10 MHz bandwith. The modulator operates from ± 5 V power supplies and consumes 5.7 W. Each block of the modulator is presented at transistor(More)
— The ability of adjustment of the central frequency of a Gm-C resonator in GaAs technology is discussed. First, it is shown that whatever the technology the wanted quality factor can be reached through an appropriate sizing of the transcon-ductance values, with adding an external feedback capacitor in the transconductance amplifiers. Then, it is(More)
— This paper proposes an analog-to-digital converter with two working modes. In the first mode, the system is a sigma-delta passive converter: the analog modulator uses a passive switched-capacitor low-pass filter and the only active element is the comparator. The consumption is low and the resolution is moderate (9 bits). In the second mode, the expected(More)
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