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公开(公告)号：US20210012763A1
公开(公告)日：2021-01-14
申请号：US16926680
申请日：2020-07-11
发明人： Michael Jon WURTZ
IPC分类号： G10K11/175 , G10L25/51 , H04R3/04 , H03F3/183 , H03G3/30
摘要： Circuits, devices and methods related to mode-switching of amplifiers. In some embodiments, an audio controller can include a mode state engine configured to receive an enable signal and generate a control signal for controlling a mode transition of an amplifier between a current source mode and a voltage source mode, with the mode transition of the amplifier resulting in an artifact sound. The audio controller can further include an enable component configured to provide the enable signal to the mode state engine based on a masking sound in an audio signal, such that the artifact sound is substantially masked by the masking sound during the mode transition of the amplifier.
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公开(公告)号：US20220270582A1
公开(公告)日：2022-08-25
申请号：US17669714
申请日：2022-02-11
发明人： Michael Jon WURTZ
IPC分类号： G10K11/175 , G10L25/51 , H04R3/04 , H03G3/30 , H03F3/183
摘要： In some embodiments, an audio amplifier can be controlled by a method that includes generating an enable signal based on a masking sound in an audio signal, and controlling a mode transition of the audio amplifier between a current source mode and a voltage source mode based on the enable signal. The mode transition of the audio amplifier can result in an artifact sound, the generating of the enable signal and the controlling of the mode transition can be achieved such that the artifact sound is substantially masked by the masking sound.
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公开(公告)号：US20230292045A1
公开(公告)日：2023-09-14
申请号：US18120336
申请日：2023-03-10
CPC分类号： H04R3/04 , H04R17/02 , H04R17/10 , H04R29/004 , H04R2201/003
摘要： In some embodiments, a microphone can include a piezoelectric sensor configured to provide a response to acoustic energy in a frequency band, with the response including an in-band resonance having a peak frequency within the frequency band. The microphone can further include an equalizer coupled to the piezoelectric sensor and configured to provide equalization of the response of the piezoelectric sensor, such that the equalizer removes or adjusts the in-band resonance from the response of the piezoelectric sensor.
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公开(公告)号：US20230283291A1
公开(公告)日：2023-09-07
申请号：US18117375
申请日：2023-03-03
发明人： Min Gyu KIM , Joseph HAMILTON , Timir NANDI , Barkat A. WANI , Praveen Kumar VENKATACHALA , Wai Laing LEE , Michael Jon WURTZ , Humberto CAMPANELLA-PINEDA
IPC分类号： H03M3/00
CPC分类号： H03M3/464 , H04R2201/003 , H04R1/08
摘要： In some embodiments, an analog-to-digital converter (ADC) architecture can be implemented to process a signal from a charge output sensor. The ADC architecture can include a summing node for receiving a sensor signal from the charge output sensor, and an output node implemented to provide a digital signal representative of the sensor signal. The ADC architecture can further include a charge amplifier implemented to receive an analog signal from the summing node as an input analog signal and generate an output analog signal with a gain, and an ADC circuit implemented to generate the digital signal based on the output analog signal from the charge amplifier. The ADC architecture can further include a feedback circuit implemented between the output node and the summing node.
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5.发明公开公开(公告)号：US20230267908A1
公开(公告)日：2023-08-24
申请号：US18098036
申请日：2023-01-17
IPC分类号： G10K11/178
CPC分类号： G10K11/17813 , G10K11/17873
摘要： In some embodiments, a method for evaluating headphones during a manufacturing process can include generating a test sound and measuring a response to the test sound from a headphone being evaluated. The method can further include configuring and/or calibrating the headphone based on the measurement. In some embodiments, such a method can be implemented as part of a process for manufacturing of a large number of headphones having active noise cancellation functionality.
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