Abstract: The invention concerns a method and a circuit for maximum power point tracking of a variable power source from a comparison of an image of the power (P) supplied by the power source, the circuit comprising two elements (14, 31) providing different propagating delays to a physical quantity proportional to the power image, a comparator (16) of the outputs of the delaying elements to control a trigger (17) supplying a signal (Q) with two automatic control states to a static power converter, and means (33) for detecting a transitory operating condition from variations in oscillations of an established operating condition and means (32) for modifying the delay input by the slower delaying element (31).

Abstract: An amplifying device for a sensor (10) delivering a response in voltage or impedance has a voltage controlling means for the sensor and at least an additional impedance (12). The voltage controlling means (22) is connected to output terminals (16, 20) of the sensor to maintain a noticeably constant voltage between the terminals. The additional impedance (12) is connected in series with the sensor within a polarization circuit, between the output terminals (18–16; 18–20) of the device. The amplifying device may be applied to temperatures, irradiation levels and pH measurement.

Abstract: The invention relates to a biosensor matrix comprising a substrate made of semiconductor material. It has a main plane surface and cavities formed in a surface opposite from said plane surface to define between the bottoms of said cavities and the main plane surface deformable structure each including at least one piezoresistive or piezoelectric sensing element. The method of manufacture implements fabrication techniques specific to micro- and nanotechnologies, preferably with localized pre-amorphization of the surface of the substrate prior to implantation of piezoelectric elements, which implantation is followed by annealing.

Abstract: The invention concerns a method and a circuit for maximum power point tracking of a variable power source from a comparison of an image of the power (P) supplied by the power source, the circuit comprising two elements (14, 31) providing different propagating delays to a physical quantity proportional to the power image, a comparator (16) of the outputs of the delaying elements to control a trigger (17) supplying a signal (Q) with two automatic control states to a static power converter, and means (33) for detecting a transitory operating condition from variations in oscillations of an established operating condition and means (32) for modifying the delay input by the slower delaying element (31).

Abstract: The invention relates to a biosensor matrix comprising a substrate made of semiconductor material. It has a main plane surface and cavities formed in a surface opposite from said plane surface to define between the bottoms of said cavities and the main plane surface deformable structure each including at least one piezoresistive or piezoelectric sensing element. The method of manufacture implements fabrication techniques specific to micro- and nanotechnologies, preferably with localized pre-amorphization of the surface of the substrate prior to implantation of piezoelectric elements, which implantation is followed by annealing.

Abstract: Amplifying device for a sensor (10) delivering a response in voltage or impedance comprising: