公开(公告)号：US12156003B2

公开(公告)日：2024-11-26

申请号：US17960692

申请日：2022-10-05

Applicant: Knowles Electronics, LLC

Inventor： Jakob Kenn Toft ,  Mohammad Shajaan ,  Claus Erdmann Fürst

IPC: H04R3/02 ,  B81B3/00 ,  B81B7/00 ,  H02M3/07 ,  H04R1/04 ,  H04R3/04 ,  H04R7/04 ,  H04R19/04

Abstract: The present disclosure relates to a transducer assembly including a transducer having a movable member, and a servo-loop controller configured to compensate for effects of a disturbance on the transducer assembly by adjusting a bias voltage applied to the transducer. A servo-loop controller having a smaller bandwidth for out-of-band disturbances than for in-band disturbances and configured to control the bias voltage based on a feedback signal generated by a sensor that detects an effect of the disturbance on the transducer assembly. The transducer assembly can be implemented as a microphone or a speaker among other sensors and actuators.

公开(公告)号：US20230112042A1

公开(公告)日：2023-04-13

申请号：US17960692

申请日：2022-10-05

Applicant: Knowles Electronics, LLC

Inventor： Jakob Kenn Toft ,  Mohammad Shajaan ,  Claus Erdmann Fürst

IPC: H04R3/02 ,  H02M3/07 ,  B81B3/00 ,  B81B7/00 ,  H04R19/04 ,  H04R1/04 ,  H04R3/04

Abstract: The present disclosure relates to a transducer assembly including a transducer having a movable member, and a servo-loop controller configured to compensate for effects of a disturbance on the transducer assembly by adjusting a bias voltage applied to the transducer. A servo-loop controller having a smaller bandwidth for out-of-band disturbances than for in-band disturbances and configured to control the bias voltage based on a feedback signal generated by a sensor that detects an effect of the disturbance on the transducer assembly. The transducer assembly can be implemented as a microphone or a speaker among other sensors and actuators.

公开(公告)号：US12095390B2

公开(公告)日：2024-09-17

申请号：US17959310

申请日：2022-10-04

Applicant: Knowles Electronics, LLC

Inventor： Jakob Kenn Toft

IPC: H02N2/00 ,  H02M3/06

CPC classification number: H02N2/0075 ,  H02M3/06 ,  H02N2/005

Abstract: A PM signal generator can generate a variable PM signal based on a position of a movable element of a MEMS motor. A bias voltage generator can provide a bias voltage to the MEMS motor. The bias voltage generator can include a reference signal generator that can generate a reference signal that varies based on variation of pulses of the PM signal. The bias voltage can be based on the reference signal.

公开(公告)号：US20230115233A1

公开(公告)日：2023-04-13

申请号：US17962409

申请日：2022-10-07

Applicant: Knowles Electronics, LLC

Inventor： Jakob Kenn Toft

IPC: H04R3/04 ,  H02M3/07 ,  H02M1/44 ,  H04R19/04 ,  H04R1/04

Abstract: The disclosure relates to a transducer assembly like a microphone including a bias circuit having a charge pump and a filter circuit coupled to a transducer. The filter circuit includes a voltage-controlled resistor located between an output of the charge pump and the transducer, and a capacitor coupled to the voltage-controlled resistor opposite the charge pump, wherein the bias circuit is configured with a larger bandwidth for faster settling during transient operation than during steady-state operation.

公开(公告)号：US12160715B2

公开(公告)日：2024-12-03

申请号：US17962409

申请日：2022-10-07

Applicant: Knowles Electronics, LLC

Inventor： Jakob Kenn Toft

IPC: H04R3/04 ,  H02M1/44 ,  H02M3/07 ,  H04R1/04 ,  H04R19/04

Abstract: The disclosure relates to a transducer assembly like a microphone including a bias circuit having a charge pump and a filter circuit coupled to a transducer. The filter circuit includes a voltage-controlled resistor located between an output of the charge pump and the transducer, and a capacitor coupled to the voltage-controlled resistor opposite the charge pump, wherein the bias circuit is configured with a larger bandwidth for faster settling during transient operation than during steady-state operation.

公开(公告)号：US20230113827A1

公开(公告)日：2023-04-13

申请号：US17959310

申请日：2022-10-04

Applicant: Knowles Electronics, LLC

Inventor： Jakob Kenn Toft

IPC: H02N2/00 ,  H02M3/06

Abstract: A PM signal generator can generate a variable PM signal based on a position of a movable element of a MEMS motor. A bias voltage generator can provide a bias voltage to the MEMS motor. The bias voltage generator can include a reference signal generator that can generate a reference signal that varies based on variation of pulses of the PM signal. The bias voltage can be based on the reference signal.