A capacitive sensor device comprises a first sensor electrode, a second sensor electrode, and a processing system coupled to the first sensor electrode and the second sensor electrode. The processing system is configured to acquire a first capacitive measurement by emitting and receiving a first electrical signal with the first sensor electrode. The processing system is configured to acquire a second capacitive measurement by emitting and receiving a second electrical signal, wherein one of the first and second sensor electrodes performs the emitting and the other of the first and second sensor electrodes performs the receiving, and wherein the first and second capacitive measurements are non-degenerate. The processing system is configured to determine positional information using the first and second capacitive measurements.

A device for measuring a variation (ΔC.sub.X) of a capacitance (C.sub.X), includes: elements for charging the capacitance (C.sub.X) on the basis of a supply voltage (V.sub.CC). elements for discharging the capacitance (C.sub.X) into a reference capacitance (C.sub.S) in a fixed number of discharges (x), elements for measuring a voltage (V.sub.S) and for detecting a threshold of voltage (V.sub.TH) across the terminals of the reference capacitance (C.sub.S). elements for charging with current (I.sub.C) the reference capacitance (C.sub.S) on the basis of the supply voltage (V.sub.CC) for a duration (t), after the transfer of charge from the capacitance (C.sub.X) into the reference capacitance (C.sub.S), and elements for measuring the variation between the duration (t) with respect to a previously measured duration so as to estimate the variation (ΔC.sub.X) of the capacitance (C.sub.X).

A capacitance detection circuit is provided, which includes a capacitance control module, a charge conversion module and a filter module connected with each other. The capacitance control module controls a capacitor to be charged/discharged for multiple times and generates a digital voltage signal according to an amount of received charges. The capacitor releases all stored charges after being charged to a preset voltage during each charge/discharge. In response to the digital voltage signal being at a high level, the charge conversion module outputs negative charges with a preset charge amount to the capacitance control module. The preset charge amount is greater than or equal to an amount of the stored charges when the capacitor is charged to the preset voltage. The filter module obtains a value representing a capacitance of the capacitor according to the digital voltage signal.

The present invention reconfigures the Capacitor Detect Area (CDA) constituting two columns to reduce the number of CDAs constituting one column and increase the number of CDAs constituting the other so that object separation operation is possible in the column in which the number of CDAs is increased.

An Arrangement (10) for a capacitive sensor device (20) of a vehicle (1), in particular for control and/or evaluation at the capacitive sensor device (20) for detecting an activating action at the vehicle (1), with at least one sensor electrode (20.1) for sensing a change in a vicinity of the vehicle (1), and with a transmission arrangement (30) for providing an output signal (A) by a frequency-dependent change of an electrical input signal (E) of the transmission arrangement (30), and with an output (30.2) of the transmission arrangement (30), which is electrically connected to the sensor electrode (20.1) in order to operate the sensor electrode (20.1) with the output signal (A), wherein the transmission arrangement (30) includes at least one filter component (30.4, 30.5) to perform the frequency-dependent change.

As applied to the field of touch control technology, a capacitance sensing circuit for sensing a detection capacitor of a detecting circuit, includes: a capacitance judging circuit coupled to the detecting circuit for judging the capacitance of the detection capacitor according to the output signal; and an input signal generator coupled to the detecting circuit for generating the input signal according to noise. The input signal generator includes: a phase detection unit for receiving the noise and detecting a first phase of the noise; a phase calculation unit coupled to the phase detection unit for receiving the noise and the first phase and calculating an optimum phase according to the noise and the first phase; and a first waveform generator coupled to the phase calculation unit for generating the input signal according to the optimum phase.

A sensor for detecting the level of a medium contained in a container, in particular a tank, comprises: an array of capacitive elements designed to be associated to the container (1), in particular so as to extend according to an axis of detection (X) of the level of the medium (L), the array of capacitive elements comprising a plurality of electrodes (Ji-Jn), in particular on a face of an electrically insulating substrate (20) having a generally elongated shape, the electrodes (Ji-Jn) being spaced apart from one another, in particular along the detection axis (X), and being preferably substantially coplanar with one another; at least one insulation layer (16) for insulating electrically the electrodes (Ji-Jn) with respect to the inside of the container (1); and a controller (24) having a plurality of inputs. Each capacitive element comprises at least one of a single electrode and a set of electrodes connected together in common, in particular in parallel, the single electrode or the set of electrodes being connected to a respective input of the plurality of inputs. The controller (24) is pre-arranged for discriminating a value of capacitance associated to each electrode (Ji-Jn) in order to deduce the level of the medium present container.

A presence detection sensor for unlocking an opening panel of a motor vehicle, said sensor comprising a microcontroller implementing an analog-digital converter and comprising a first input, a second input forming the voltage reference of said analog-digital converter, a third input for supplying the microcontroller with voltage, and a plurality of inputs-outputs, and a capacitive voltage divider connected to at least one of the inputs-outputs of the plurality of inputs-outputs. The sensor comprises a resistive module connected between the first input and the second input of the microcontroller and a capacitive module connected between the second input of the microcontroller and a ground.

The present disclosure relates to the field of touch technologies, and in particular, to a capacitance detection circuit, a capacitance detection method, a touch chip, and an electronic device. The capacitance detection circuit includes: a control module, a charge transfer module, a processing module, a drive module, and a cancellation module. The control module is configured to control the drive module to charge a capacitor to be detected. The cancellation module is configured to perform M times of charge cancellations on the capacitor to be detected. The charge transfer module is configured to convert a charge of the capacitor to be detected, subject to the M times of charge cancellations, to generate an output voltage. The processing module is configured to determine, according to the output voltage, a capacitance variation of the capacitor to be detected.

Systems and methods for determining a touch input are provided. The systems and methods generally include measuring the peak voltage at an electrode over a measurement period and determining a touch input based on the peak voltage. The systems and methods can conserve computing resources by deferring digital signal processing until after a peak electrode capacitance has been sampled. The systems and methods are suitable for capacitive sensors using self-capacitance and capacitive sensors using mutual capacitance. The systems and methods are also suitable for capacitive buttons, track pads, and touch screens, among other implementations.