- 专利标题: Microelectromechanical Systems Sensor with Stabilization Circuit
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申请号: US18087327申请日: 2022-12-22
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公开(公告)号: US20240214747A1公开(公告)日: 2024-06-27
- 发明人: Mark Niederberger
- 申请人: Knowles Electronics, LLC
- 申请人地址: IL Itasca
- 专利权人: Knowles Electronics, LLC
- 当前专利权人: Knowles Electronics, LLC
- 当前专利权人地址: IL Itasca
- 主分类号: H04R19/04
- IPC分类号: H04R19/04 ; H03F3/183
摘要:
A microelectromechanical systems (MEMS) sensor, a capacitive MEMS motor sensing circuit and a method are provided. The MEMS sensor includes a housing having electrical contacts disposed on an exterior of the housing. The MEMS sensor further includes a capacitive MEMS motor disposed in the housing, and an electrical circuit disposed in the housing and being electrically coupled to the electrical contacts. The electrical circuit includes a bias voltage source having an output coupled to an input of the MEMS motor. The electrical circuit further includes an amplifier including an amplifier input stage having an input, coupled to an output of the MEMS motor, the amplifier input stage having a negative input resistance, where a sum of a series resistance of the MEMS motor at the input and the negative input resistance is less than zero, and wherein application of a signal from the output of the MEMS motor to the input of the amplifier input stage produces a negative real part of input current. The electrical circuit still further includes a stabilization circuit having an output coupled to the input of the amplifier input stage, where the stabilization circuit injects a compensation current at the input of the amplifier input stage that offsets at least a portion of the negative real part of input current.
公开/授权文献
- US1754618A Connecting rod for air pumps 公开/授权日:1930-04-15
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