Abstract: The present disclosure describes a method and apparatus that can be used to determine whether an object is in proximity of an electronic device. When an object is not in proximity to the electronic device, the arrangement of two sensors at different distances from the optical emitter results in a higher strength of a reflection signal received in the sensor closer to the optical emitter and a lower strength of a reflection signal received in the sensor further from the optical emitter. The system uses this difference in reflection signals to calculate a ratio between the signals that are being reflected to both sensors, and based on the ratio whether an object is in proximity to the electronic device.

Abstract: A method of operating an optical proximity sensor of a computer device having a display, where the optical proximity sensor is located beneath or otherwise adjacent to the display. The method comprises obtaining a vertical synchronization signal from a display driver, and synchronizing periodic illumination of a light emitter of the optical proximity sensor with the vertical synchronization signal.

Abstract: A method of operating an optical proximity sensor of a computer device having a display, where the optical proximity sensor is located beneath or otherwise adjacent to the display. The method comprises obtaining a vertical synchronization signal from a display driver, and synchronizing periodic illumination of a light emitter of the optical proximity sensor with the vertical synchronization signal.

Abstract: A sensor arrangement comprises an integrator with an integrator input, a sensor coupled to the integrator input, a balancing current generator coupled to the integrator input and a compensation current generator coupled to the integrator input.

Abstract: The present disclosure describes a method and apparatus that can be used to determine whether an object is in proximity of an electronic device. When an object is not in proximity to the electronic device, the arrangement of two sensors at different distances from the optical emitter results in a higher strength of a reflection signal received in the sensor closer to the optical emitter and a lower strength of a reflection signal received in the sensor further from the optical emitter. The system uses this difference in reflection signals to calculate a ratio between the signals that are being reflected to both sensors, and based on the ratio whether an object is in proximity to the electronic device.

Abstract: An apparatus includes a display screen, and an optical proximity sensor module disposed behind the display screen. The optical proximity sensor module includes a light emitter operable to produce light having a wavelength for transmission through the display screen toward a target object, and a light sensor operable to sense light reflected by the target object and having the wavelength. The optical proximity sensor module can includes means for reducing a maximum energy density of a light beam produced by the light emitter. The means for reducing the maximum energy density of the light beam is disposed between the light emitter and the display screen so as to intersect the light beam produced by the light emitter. In some cases, there are multiple light emitters collectively operable to provide sufficient optical energy for proximity sensing without producing a visible spot on the display screen.

Abstract: An analog-to-digital converter (ADC) is based on single-bit delta-sigma quantization. The ADC includes an integrator, a threshold detector, a feedback block, a range control circuit and an output processing block. The ADC is configured to, based on its own generated digital bitstream, adjust the magnitude of a subtrahend signal in order to achieve autonomous auto-ranging of the ADC during the integration time of a measurement. In particular, the auto-ranging allows for the efficient conversion of an analog input signal with high dynamic range, for example ambient light, to a digital output signal.

Abstract: A method for light sensing senses the light during a sub-frame of a picture frame operated display. The sensing is performed during an adaptive observation window which is determined in dependence on the duty cycle of the operation of the display. A calculation that uses the light sensed during the observation window and the light sensed during the sub-frame delivers a value indicative of the amount of received ambient light.

Abstract: A method of operating an optical proximity sensor of a computer device having a display, where the optical proximity sensor is located beneath or otherwise adjacent to the display. The method comprises obtaining a vertical synchronization signal from a display driver, and synchronizing periodic illumination of a light emitter of the optical proximity sensor with the vertical synchronization signal.

Abstract: The invention relates to an analog-to-digital converter, ADC, based on single-bit delta-sigma quantization. The ADC includes an integrator, a threshold detector, a feedback block, a range control circuit and an output processing block. The ADC is configured to, based on its own generated digital bitstream, adjust the magnitude of a subtrahend signal in order to achieve autonomous auto-ranging of the ADC during the integration time of a measurement. In particular, the auto-ranging allows for the efficient conversion of an analog input signal with high dynamic range, for example ambient light, to a digital output signal.

Abstract: A method for light sensing senses the light during a sub-frame (501) of a picture frame operated display. The sensing is performed during an adaptive observation window (c) which is determined in dependence on the duty cycle (DC) of the operation of the display. A calculation that uses the light sensed (OWP) during the observation window and the light sensed during the sub-frame (ALLP) delivers a value indicative of the amount of received ambient light.

Abstract: A sensor arrangement comprises an integrator with an integrator input, a sensor coupled to the integrator input, a balancing current generator coupled to the integrator input and a compensation current generator coupled to the integrator input.

Abstract: A host interface circuit operates in a power mode when connected to an accessory device compatible with a power supply via a first line of a data cable. During power mode, the host interface circuit couples a power regulator to the first line. The host interface circuit operates in a legacy mode when connected to an accessory device not compatible with such a power supply and couples the legacy terminal to the first line during legacy mode. An accessory interface circuit configured to operate in a power mode when connected to a host device capable of a power supply via a first line couples a power input of an active device to the first line and a data input of the active device to a second line during power mode.

Abstract: A set of headphones includes a connector with a first connection contact and a second connection contact as well as a loudspeaker, which is connected to the first connection contact in order to supply a loudspeaker signal. The set of headphones also includes a first and a second digital microphone, each of which is set up to generate a digital microphone signal, in particular with a binary bit stream. A multiplexer, which is coupled, at an output, to the second connection contact, is set up to generate a coded multiplex signal at the output on the basis of the microphone signals.

Abstract: A host interface for a media device comprises a first and a second host audio terminal for receiving a first and a second analog audio signal, a first and a second connector audio terminal for connecting a first and a second pole of a four-pole connector, and a host control circuit. The host control circuit is adapted to detect whether a device requiring a supply signal over the four-pole connector is connected. If no such device is detected, the first and the second analog audio signal are passed to the first and the second connector audio terminal. If such a device is detected, the first connector audio terminal is connected to a supply terminal.

Abstract: A host interface circuit operates in a power mode when connected to an accessory device compatible with a power supply via a first line of a data cable. During power mode, the host interface circuit couples a power regulator to the first line. The host interface circuit operates in a legacy mode when connected to an accessory device not compatible with such a power supply and couples the legacy terminal to the first line during legacy mode. An accessory interface circuit configured to operate in a power mode when connected to a host device capable of a power supply via a first line couples a power input of an active device to the first line and a data input of the active device to a second line during power mode.

Abstract: An active noise control arrangement has a signal input (SI), a microphone input (MI), a signal output (SO) and a digital interface (DI). A signal processing block (SP) coupled to the microphone input (MI) by means of an amplifier (MA) has a digitally adjustable gain and comprises combining means (CM) and a filter (TP). The signal processing block (SP) is configured to generate an output signal at the signal output (SO) as a function of an input signal at the signal input (SI) and an amplified microphone signal. A control block (CB) is coupled to the digital interface (DI) and configured to adjust the gain of the amplifier (MA).

Abstract: A set of headphones includes a connector with a first connection contact and a second connection contact as well as a loudspeaker, which is connected to the first connection contact in order to supply a loudspeaker signal. The set of headphones also includes a first and a second digital microphone, each of which is set up to generate a digital microphone signal, in particular with a binary bit stream. A multiplexer, which is coupled, at an output, to the second connection contact, is set up to generate a coded multiplex signal at the output on the basis of the microphone signals.

Abstract: A host interface for a media device comprises a first and a second host audio terminal for receiving a first and a second analog audio signal, a first and a second connector audio terminal for connecting a first and a second pole of a four-pole connector, and a host control circuit. The host control circuit is adapted to detect whether a device requiring a supply signal over the four-pole connector is connected. If no such device is detected, the first and the second analog audio signal are passed to the first and the second connector audio terminal. If such a device is detected, the first connector audio terminal is connected to a supply terminal.

Abstract: A communication system has a host communication circuit and a client communication circuit, which are connected to each other by means of a single signal wire. The host communication circuit generates a voltage modulated signal on the signal wire based on a reference clock signal, which in each clock cycle has a first period with a significant voltage change based on a clock edge of the reference clock signal, and a second period with a basically constant voltage variation. The host communication circuit (HCC) further can demodulate a current modulated signal received via the signal wire from the client communication circuit. The client communication circuit is configured to detect the significant voltage change in order to generate respective sync pulses in a sync signal, which is used to generate a client clock signal.