A capacitive sensor including a sensor electrode connected to a signal generation circuit and a signal evaluation circuit. The signal generation circuit contains a signal generator that is a noise generator or a pseudo-noise generator, the signal evaluation circuit includes a synchronous rectifier. The synchronous rectifier is connected for synchronization to the signal generator.

A capacitive coupling sensor (1) is equipped with a sensor unit (10) which has: a detection electrode layer (11) which generates capacitance between the detection electrode layer (11) and a detection target, a shield electrode layer (12), and an insulation layer (13) which is arranged between the detection electrode layer (11) and the shield electrode layer (12), wherein the insulation layer (13) has a cross-linked polymer obtained by cross-linking of a thermoplastic polymer. The capacitive coupling sensor (1) has high heat resistance, can be made thinner, and has an excellent tactile quality.

The invention relates to an arrangement (10) for a vehicle (1) for detecting an activation action for activating a function on the vehicle (1), comprising: at least one sensor element (21) for sensing a change in a vicinity of the sensor element (21), a controlling arrangement (80) for an electric control of the sensor element (21) in order to provide a sensing signal (S), the frequencies of which comprise at least one predefined sensing frequency, an evaluation arrangement (90), which is interconnected to the sensor element (21) via a signal path (SP) in order to use the sensing signal (S) to repeatedly determine at least one parameter of the sensor element (21) specific to the sensing for detecting the activation action, a filter arrangement (40) in the signal path (SP) comprising at least one high-pass (41, 43) in order to at least reduce the frequencies of the sensing signal (S) lower than the at least one sensing frequency.

A switching device for actuating drive elements includes first switching elements situated on a housing surface to be actuatable by fingers of a person and a second switching element situated on a housing surface to be actuatable by a palm, a palm heel, or a thumb of the person. The first and second switching elements are formed by touch surface sensors without switching contacts. In one variation, actuation of one of the first switching elements causes actuation of a corresponding one of the drive elements only when the second switching element is actuated during the actuation of the one of the first switching elements. In another variation, simultaneous actuation of one of the first switching elements and the second switching element causes a drive element corresponding to the one of the first switching elements to be actuated according to a function corresponding to the second switching element.

The present application provides a proximity detection method and circuit thereof. The circuit includes a detection circuit, a baseline generating circuit, and a proximity sensing circuit. The proximity sensing circuit generates a proximity signal according to a detection data generated by the detection circuit, a baseline data generated by the baseline generating circuit and a proximity threshold, and judges whether the proximity signal is valid according to the detection data, a reference data, and a valid threshold. The validity of the proximity signal may be judged according to the reference data and the valid threshold and thus avoiding false judgement caused by the influences of the ambient factors.

Systems and methods for determining a likelihood of an occurrence of an anomaly in a sensor are described. A processor can receive a first measurement of a first capacitance change between a first port and a second port of a device connected to the sensor. The first measurement can be obtained in response to the first port being configured to perform a first function, and in response to the second port being configured to perform a second function. The processor can receive a second measurement of a second capacitance change between the first and second ports. The second measurement can be obtained in response to the first port being configured to perform the second function, and in response to the second port being configured to perform the first function. The processor can determine the likelihood of the occurrence of the anomaly based on the first and second measurements.

A capacitive sensor with a plurality of sense inputs connectable to capacitive sense electrodes and a common reference input, each sense input and the reference input can be put in a measure state, in a ground state, or in a shield state. The sensor can be equipped with external reference capacitors between each of the sense input and the common reference terminal. The reference capacitor can be read individually by selectively pulling one of the input terminals to ground and driving the other to be equipotential with the reference input.

Systems, methods, and devices improve the sensitivity of capacitive sensors. Devices may include an attenuator configured to receive an input from at least one sense electrode of a capacitive sensing device. The attenuator may be included in a sensing channel of a capacitive sensor. Devices may further include a signal generator coupled to an input of the attenuator. The signal generator may include one or more processors configured to generate a sinusoidal signal based, at least in part, on one or more noise characteristics of a scan sequence associated with one or more transmit electrodes of the capacitive sensing device, and provide the sinusoidal signal to the input of the attenuator.

The present application provides a capacitance detection module, a method and an electronic device, including: a sensing module and detecting circuit; a first sensing unit is disposed on the first surface of the sensing module, and a second sensing unit is disposed on the second surface of the sensing module; the first sensing unit and the second sensing unit are respectively connected to the detecting circuit; the detecting circuit is configured to determine, according to the capacitance value of the first sensing unit and the capacitance value of the second sensing unit, the wearing state of the user to the device having the capacitance detection module. Thereby the problem that the capacitance detection is affected by temperature is avoided.

The present application relates to a method of operating a capacitance sensing device comprises: calculating a difference of a raw data compared to one of the raw data received in a previous data frame; and performing a comparison calculation based on the raw data and a stored baseline value to determine whether a proximity event has occurred. Under the proximity event, selects one of several baseline value update procedures based on the magnitude of the difference. Thus, the present application effectively avoids the problem of failure to update the baseline value when the object is close to the capacitance sensing device for a long period of time, which may lead to misjudgment of the capacitance sensing device.