Abstract: A capacitive sensing device including logic components and a capacitive sensor having at least one electrode, said logic components and capacitive sensor being arranged to form an oscillator, where the capacitive sensor includes a plurality of capacitive sensing electrodes, as well as a selector arranged to form an oscillator selectively from a plurality of possible oscillators, by connecting the logic components with respectively, in the case of each oscillator formed, a given combination from the plurality of electrodes of the capacitive sensor including at least an emission electrode and a reception electrode forming a capacitor formed by means of mutual electrostatic coupling.

Abstract: The device has a component providing an outlet signal whose oscillation frequency depends on a physical unit to be measured, and a reference oscillator. A phase comparison component compares the component and the oscillator for control on the component or for mutual control. A synchronization unit permits alternatively blocking and oscillation of the component. A determination unit determines a derivative signal from evolution of the output signal of the component. The device also includes an electrostatic type keyboard having an electrode assembly.

Abstract: An electronic device used for measuring and detecting the variations of at least one input signal, comprising a first component (OSC1) providing an output signal, the oscillation frequency of which is representative of the input signal, a reference oscillator (OSC2), a phase comparison component (CP) providing a comparison between the oscillations of the first component (OSC1) and the reference oscillator (OSC2), in particular for a loop control of the reference oscillator on the first component, or of the first component on the reference oscillator, or for a mutual control, and elastic coupling means (C) between the first component (OSC1) and the reference oscillator (OSC2).