Microphone device with integrated pressure sensor
AssigneeKnowles Electronics, LLC
InventorsVenkataraman Chandrasekaran, Claus Furst, Joshua Watson, John Szczech
Life of this patent
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Abstract
A microphone device comprises a microphone die including a microphone motor, an acoustic integrated circuit structured to process signals produced by the microphone motor, and a sensor die stacked on top of the acoustic integrated circuit, wherein the sensor die comprises a pressure sensor. Another microphone comprises a microphone die including a microphone motor and an integrated circuit die. The integrated circuit die comprises an acoustic integrated circuit structured to process signals produced by the microphone motor, a pressure sensor, and a pressure integrated circuit structured to press signals produced by the pressure sensor.
Claims21
A microphone device comprising:
- a substrate;
- a cover attached to the substrate that forms a housing interior with the substrate;
- a microphone die disposed in the housing interior, wherein the microphone die includes a microphone motor including a diaphragm and a backplate opposing the diaphragm;
- an acoustic integrated circuit structured to process signals produced by the microphone motor;
- and
- a sensor die disposed in the housing interior and stacked on top of the acoustic integrated circuit, wherein the sensor die comprises a pressure sensor and a one-time programmable memory, wherein the pressure sensor carried by the sensor die is calibrated after the sensor die is integrated into the microphone device and calibration information of the pressure sensor is stored in the one-time programmable memory.
A microphone device comprising:
- a substrate;
- a cover attached to the substrate that forms a housing interior with the substrate;
- a microphone die disposed in the housing interior, wherein the microphone die includes a microphone motor, and wherein the microphone motor includes a diaphragm and a backplate opposing the diaphragm;
- and
- an integrated circuit die comprising an acoustic integrated circuit structured to process signals produced by the microphone motor, a pressure sensor, and a pressure integrated circuit structured to process signals produced by the pressure sensor, wherein the pressure sensor is calibrated after the integrated circuit die is integrated into the microphone device and calibration information of the pressure sensor is stored in a one-time programmable memory included in the integrated circuit die.
Dependencies are inferred from the claim text.