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Jérôme Saby

Yves Theoduloz

Luca De Rosa

Thomas Coulot

Cyril Marti

Mario Dellea

Mathieu Coustans

Matteo Contaldo

Lorenzo Pierobon

Maeve Petit

Yves Théoduloz

A displacement detection circuit () configured to implement a displacement detection method () for a pointing device () having at least one pixel array (). The displacement detection circuit () includes at least one main calculator (), at least one auxiliary calculator () at least one comparator () and at least one motion detector (). The main calculator () is configured to calculate at least one main average () corresponding to the average of the at least one pixel array (), which is compared to at least one auxiliary average () of the at least one auxiliary calculator (). According to the result of the comparison, the at least one motion detector () indicates at least one direction () of displacement of the pointing device ().

Displacement detection circuit and method thereof

The DC-DC converter includes an inductor cooperating with a first switch and a second switch operating alternately, in order to supply an output voltage of higher, equal or lower level than the level of an input voltage. The converter includes a switching control unit for the switches for determining a first switching time for the first switch and a second switching time for the second switch. The switching control unit includes a voltage-current conversion circuit for converting into current a comparison voltage, which is the difference between the output voltage and the input voltage, a first current being supplied by the conversion circuit for charging a first capacitor to a first voltage threshold to determine the first switching time and a second current being supplied by the conversion circuit for charging a second capacitor to a second voltage threshold to determine the second switching time.

Discontinuous mode DC-DC converter including a voltage-current conversion circuit for converting into current a difference between an output voltage and an input voltage of switches of the converter

Growing community of inventors

Neuchâtel, Switzerland

Jérôme Saby