Abstract: A system includes: first and second hearing devices, each hearing device comprising an output transducer, a wireless communication unit, an antenna, and a power supply having primary and secondary voltage sources, wherein the secondary voltage source provides a lower voltage than the primary voltage source; and a detector arrangement to provide a quality indicator indicative of a quality of a wireless link between the first and second hearing devices, wherein each of the first and second hearing devices comprises a control unit configured to operate the respective hearing device in: when the quality indicator is above a threshold, a first power mode in which the respective hearing device uses its secondary voltage source to drive transmission with its antenna, and when the quality indicator is below the threshold, a second power mode in which the respective hearing device uses its primary voltage source to drive transmission with its antenna.

Abstract: A system includes: first and second hearing devices, each hearing device comprising an output transducer, a wireless communication unit, an antenna, and a power supply having primary and secondary voltage sources, wherein the secondary voltage source provides a lower voltage than the primary voltage source; and a detector arrangement to provide a quality indicator indicative of a quality of a wireless link between the first and second hearing devices, wherein each of the first and second hearing devices comprises a control unit configured to operate the respective hearing device in: when the quality indicator is above a threshold, a first power mode in which the respective hearing device uses its secondary voltage source to drive transmission with its antenna, and when the quality indicator is below the threshold, a second power mode in which the respective hearing device uses its primary voltage source to drive transmission with its antenna.

Abstract: The present disclosure relates to a head-wearable hearing device which comprises a magnetic inductance antenna having a predetermined resonance period for receipt of wireless data signals and a switched capacitor DC-DC converter configured for converting a DC input voltage into a higher or lower DC output voltage in accordance with a clock signal. The charge pump circuit is configured to charge an output capacitor by output current pulses where the output current pulses at least comprise first and second consecutive output current pulses having a mutual pulse delay corresponding to substantially one-half of the predetermined resonance period of the magnetic inductance antenna.

Abstract: The present disclosure relates to a head-wearable hearing device which comprises a magnetic inductance antenna having a predetermined resonance period for receipt of wireless data signals and a switched capacitor DC-DC converter configured for converting a DC input voltage into a higher or lower DC output voltage in accordance with a clock signal. The charge pump circuit is configured to charge an output capacitor by output current pulses where the output current pulses at least comprise first and second consecutive output current pulses having a mutual pulse delay corresponding to substantially one-half of the predetermined resonance period of the magnetic inductance antenna.

Abstract: The present disclosure relates to a head-wearable hearing device which comprises a magnetic inductance antenna having a predetermined resonance period for receipt of wireless data signals and a switched capacitor DC-DC converter configured for converting a DC input voltage into a higher or lower DC output voltage in accordance with a clock signal. The charge pump circuit is configured to charge an output capacitor by output current pulses where the output current pulses at least comprise first and second consecutive output current pulses having a mutual pulse delay corresponding to substantially one-half of the predetermined resonance period of the magnetic inductance antenna.

Abstract: A microphone and a method for operating a Microphone are disclosed. In an embodiment the microphone includes a transducer and a mode controller. The microphone has a normal operating mode (MO) and a collapse mode (M1). The mode controller switches to the collapse mode (M1) when an output signal of the transducer reaches or exceeds a predefined threshold value and switches to the normal operating mode (MO) when the output signal reaches or falls below a predefined further threshold value (S1).

Abstract: A differential microphone with improved biasing and a well defined common mode output voltage is connected to an amplifier that includes a differential amplifier stage and a common mode feedback circuit. The amplifier is in a feedback configuration.

Abstract: The present invention concerns a MEMS Microphone (1) comprising, a transducer element (2) for providing an electrical signal, a first part (3) for receiving the electrical signal from the transducer element (2) and for providing a processed signal, a second part (4) for receiving the processed signal from the first part (3) and for providing an output signal of the MEMS microphone (1), and a gain control unit (5) that is enabled to adjust a gain setting of the first part (3) and to adjust a gain setting of the second part (4). Further, another aspect of the present invention concerns a method of operating said MEMS microphone (1) comprising the step of adjusting a gain setting of the first part (3) and adjusting a gain setting of the second part (4).

Abstract: A microphone and a method for operating a Microphone are disclosed. In an embodiment the microphone includes a transducer and a mode controller. The microphone has a normal operating mode (MO) and a collapse mode (M1). The mode controller switches to the collapse mode (M1) when an output signal of the transducer reaches or exceeds a predefined threshold value and switches to the normal operating mode (MO) when the output signal reaches or falls below a predefined further threshold value (S1).

Abstract: The present disclosure relates to an amplifier circuit (2) for a capacitive transducer (1), comprising a preamplifier (8) adapted to receive a transducer signal through an input node (9) and to provide an amplified signal at an output node (10), and a transconductance amplifier (11) comprising a first input (12) and an output (14), wherein the first input (12) of the transconductance amplifier (11) is connected to the output node (10), and the output (14) of the transconductance amplifier (11) is connected to the input node (9).

Abstract: A double backplate microphone having a good signal-to-noise ratio and being produceable at reduced manufacturing costs is provided. A microphone comprises a first backplate BP1, a second backplate BP2 and a membrane M. The microphone further comprises an amplifier AMP with a single-ended input port. The first backplate BP1 is electrically connected to the single-ended input port.

Abstract: The present invention concerns a MEMS Microphone (1) comprising, a transducer element (2) for providing an electrical signal, a first part (3) for receiving the electrical signal from the transducer element (2) and for providing a processed signal, a second part (4) for receiving the processed signal from the first part (3) and for providing an output signal of the MEMS microphone (1), and a gain control unit (5) that is enabled to adjust a gain setting of the first part (3) and to adjust a gain setting of the second part (4). Further, another aspect of the present invention concerns a method of operating said MEMS microphone (1) comprising the step of adjusting a gain setting of the first part (3) and adjusting a gain setting of the second part (4).

Abstract: The present disclosure relates to an amplifier circuit (2) for a capacitive transducer (1), comprising a preamplifier (8) adapted to receive a transducer signal through an input node (9) and to provide an amplified signal at an output node (10), and a transconductance amplifier (11) comprising a first input (12) and an output (14), wherein the first input (12) of the transconductance amplifier (11) is connected to the output node (10), and the output (14) of the transconductance amplifier (11) is connected to the input node (9).

Abstract: A differential microphone with improved biasing and a well defined common mode output voltage is connected to an amplifier that includes a differential amplifier stage and a common mode feedback circuit. The amplifier is in a feedback configuration.

Abstract: A double backplate microphone having a good signal-to-noise ratio and being produceable at reduced manufacturing costs is provided. A microphone comprises a first backplate BP1, a second backplate BP2 and a membrane M. The microphone further comprises an amplifier AMP with a single-ended input port. The first backplate BP1 is electrically connected to the single-ended input port.

Abstract: A hearing aid with a communication circuit for wireless communication, the circuit includes a receiver for reception of data, and a communication controller that is configured for determining a delay between a receiver activation and an actual start of reception of data, and adjusting a next receiver activation in accordance with the determined delay.

Abstract: A hearing aid with a communication circuit for wireless communication, the circuit includes a receiver for reception of data, and a communication controller that is configured for determining a delay between a receiver activation and an actual start of reception of data, and adjusting a next receiver activation in accordance with the determined delay.

Abstract: A current mirror circuit has an input portion including a first transistor, which is adapted to establish a reference current. It also has an output portion including a second transistor, and a control portion between the input portion and the output portion. The control portion includes a third transistor coupled for controlling the second transistor to generate an output current which is a function of the reference current while inhibiting current leakage from the input portion to the output portion. A lowpass filter is included in the control portion to prevent noise in the input portion from influencing the second transistor.

Abstract: A current mirror circuit has an input portion including a first transistor, which is adapted to establish a reference current. It also has an output portion including a second transistor, and a control portion between the input portion and the output portion. The control portion includes a third transistor coupled for controlling the second transistor to generate an output current which is a function of the reference current while inhibiting current leakage from the input portion to the output portion. A lowpass filter is included in the control portion to prevent noise in the input portion from influencing the second transistor.

Abstract: A current mirror model is provided for designing a continuous-time filter with reduced filter noise. The current mirror model includes an input branch having a voltage V.sub.in across a series circuit including a voltage source and a resistor of resistance value R.sub.m. The voltage source has a voltage value substantially equal to the value 4kTR.sub.m, where k is the Boltzmann constant and T is the temperature. An output branch is coupled to the input branch. The output branch has a first current source and a second current source. The first current source is controlled by the voltage V.sub.in and sources a current substantially equal to a transconductance G.sub.m of the output branch times the voltage V.sub.in. The output branch transconductance G.sub.m has a transconductance value substantially less than a value of an input branch conductance 1/R.sub.m. The second current source, coupled in parallel to the first current source, sources a current substantially equal to the value 4kTG.sub.m.