- Patent Title: Applying a positive feedback voltage to an electromechanical sensor utilizing a voltage-to-voltage converter to facilitate a reduction of charge flow in such sensor representing spring
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Application No.: US16460901Application Date: 2019-07-02
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Publication No.: US11428702B2Publication Date: 2022-08-30
- Inventor: Joseph Seeger , Pradeep Shettigar
- Applicant: INVENSENSE, INC.
- Applicant Address: US CA San Jose
- Assignee: INVENSENSE, INC.
- Current Assignee: INVENSENSE, INC.
- Current Assignee Address: US CA San Jose
- Agency: Amin, Turocy & Watson, LLP
- Main IPC: G01P1/00
- IPC: G01P1/00 ; G01P15/00 ; H03F3/45 ; G01P15/125

Abstract:
Reducing a sensitivity of an electromechanical sensor is presented herein. The electromechanical sensor comprises a sensitivity with respect to a variation of a mechanical-to-electrical gain of a sense element of the electromechanical sensor; and a voltage-to-voltage converter component that minimizes the sensitivity by coupling, via a defined feedback capacitance, a positive feedback voltage to a sense electrode of the sense element—the sense element electrically coupled to an input of the voltage-to-voltage converter component. In one example, the voltage-to-voltage converter component minimizes the sensitivity by maintaining, via the defined feedback capacitance, a constant charge at the sense electrode. In another example, the electromechanical sensor comprises a capacitive sense element comprising a first node comprising the sense electrode. Further, a bias voltage component can apply a bias voltage to a second node of the electromechanical sensor. In yet another example, the electromechanical sensor comprises a piezoelectric sense element.
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