A proximity sensor for a portable wireless connected device, the sensor being arranged to determine whether a part of a user's body is near the portable connected wireless device, The sensor generates a time-averaged proximity that is asserted when the device is brought near a part of a user's body for a given time and may be periodically reset momentarily during the periods of proximity. An integration time comparable with that used in SAR testing, such that the sensor may be used advantageously to reduce the radio power emitted by a portable device when it is near the body, can be obtained by a sigma/delta modulator configured as rate-compression unit.

An electronic device includes a driving control signal generation circuit configured to generate first and second driving control signals and a driving switching control signal. The electronic device also includes a switching control signal driving circuit configured to drive a switching control signal to a first voltage on the basis of the first driving control signal and the driving switching control signal or drive the switching control signal to a second voltage on the basis of the second driving control signal, depending on whether a power-down mode is performed.

An electronic device includes a driving control signal generation circuit configured to generate first and second driving control signals and a driving switching control signal. The electronic device also includes a switching control signal driving circuit configured to drive a switching control signal to a first voltage on the basis of the first driving control signal and the driving switching control signal or drive the switching control signal to a second voltage on the basis of the second driving control signal, depending on whether a power-down mode is performed.

A power on/off circuit includes: a sensor for generating a corresponding first control signal based on a user operation; a first switch element, a first end of the first switch element being connected to a voltage input end, a second end of the first switch element being connected to a voltage output end, the voltage input end being connected to a power supply voltage; and a capacitor connected between a third end of the first switch element and the sensor, the capacitor controlling an on-off of the first switch element based on the first control signal.

A driver metal-oxide-semiconductor field-effect transistor DrMOS, an integrated circuit, an electronic device, and a preparation method are provided. The DrMOS mainly includes a first die and a second die. The first die includes a drive circuit and a first switching transistor, and the drive circuit is connected to a gate of the first switching transistor. The second die includes a second switching transistor, and the drive circuit is connected to a gate of the second switching transistor through a first conductor. The drive circuit and the first switching transistor are prepared in a same die. This helps to reduce an area, loss, and costs of the DrMOS. The first switching transistor and the second switching transistor are prepared in different dies that reduces type selection limitation.

Provided are a magnetic sensor, which is capable of accurately determining abnormalities, such as disconnection and a short circuit, of wiring of a magnetic sensor device, and the magnetic sensor device. An output control circuit of the magnetic sensor includes a voltage divider circuit, which is connected to an output terminal of the magnetic sensor, and an amplifier, which is configured to control a gate voltage of a MOS transistor, which is connected to the output terminal of the magnetic sensor, so that a voltage of the voltage divider circuit and a reference voltage become equal to each other, with the result that an output voltage of the magnetic sensor is determined by the reference voltage and a voltage dividing ratio of the voltage divider circuit.

Piezoelectric elements are attractive for systems in which both sensing and actuating is required because a single element, i.e. the piezoelectric actuator, can be used that act as both a sensor and an actuator. In conventional systems combining both actuating and sensing functionality, active circuitry is required to read the sensor, and that circuitry requires static and/or dynamic current from a few microamps to a few milliamps. In systems where buttons are used a few times a day, this requirement for current leads to a significant amount of wasted power. Accordingly, a wake-up circuit is provided that does not draw power when no force is applied to the piezoelectric actuator but is capable of detecting pressure applied to the piezo actuator, generate a power-up signal to the actuating circuit, and initiate a haptic feedback with low-latency.

A proximity sensor for a portable connected wireless device generating an immediate proximity status signal (PROXSTAT, 310) that becomes active when a part of a user's body is close to the proximity sensor, an averaging unit (259) that may include a FIFO buffer, averaging the immediate proximity status flag in a predetermined time window, and a decision unit generating a time-averaged proximity status flag (350) based on an averaged value of the immediate proximity status flag in the time window, for example when the averaged value exceeds a predetermined threshold. In embodiments, the sensor is configured to switch temporarily and repeatedly the time-averaged proximity status flag to an inactive state when the value of the averaged or accumulated value yields an active state of the time-averaged proximity status flag. This feature improves the connectivity when the sensor is used to limit the RF emission of mobile devices.

A door handle including a capacitance sensor configured to detect an operation body is provided. The capacitance sensor includes a substrate formed of an insulator and having a surface, at least one first sensor electrode disposed on the surface of the substrate, a plurality of second sensor electrodes disposed on the surface of the substrate, and a controller. The number of the plurality of second sensor electrodes is greater than the number of the at least one first sensor electrode. The controller applies a voltage to the plurality of second sensor electrodes and detects a coordinate position of the operation body, in a case where a capacitance between the operation body and the at least one first sensor electrode is greater than or equal to a predetermined value.

A power supply generating circuit includes a driving voltage generating circuit and a pulse generating circuit, where the driving voltage generating circuit is configured to generate a driving voltage signal, the pulse generating circuit receives the driving voltage signal through a first input end and receives a communication signal through a second input end; at a negative phase stage of the communication signal, the first output end does not output the driving voltage signal, and the pulse generating circuit outputs a charge to an energy storage end, where the charge is input from the first output end.