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). The device comprises synchronization means (S) designed to alternatively block or authorize the influence of the oscillations of the first component (OSC1, R) on the phase comparison (CP) component and on the coupling means (C), and means (MP/MC) for determining a derived signal (DSCP) of the output signal evolution of the phase comparison (SCP) component. The applications of the device comprise the tactile human/machine interface using an electrostatic or induction-type functioning principle, signal conditioning of physical unit to be measured, particularly of capacitative, inductive, thermal, ultrasound nature or a signal used in radiofrequency identification (RFID), and signal conditioning in the field of communications, for example in frequency modulation.
ELECTRONIC DEVICE USED FOR THE MEASURING AND DETECTING THE VARIATIONS OF AT LEAST ONE INPUT SIGNAL