Invention Grant
- Patent Title: Transducer system with three decibel feedback loop
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Application No.: US17318980Application Date: 2021-05-12
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Publication No.: US11523214B2Publication Date: 2022-12-06
- Inventor: Julian Aschieri
- Applicant: Qualcomm Technologies Inc.
- Applicant Address: US CA San Diego
- Assignee: Qualcomm Technologies Inc.
- Current Assignee: Qualcomm Technologies Inc.
- Current Assignee Address: US CA San Diego
- Agency: Polsinelli
- Main IPC: H04R3/00
- IPC: H04R3/00 ; H03F3/181 ; H04R3/02 ; H03F3/183 ; H04R3/04 ; H04R17/02 ; H04R19/04

Abstract:
A transducer system has a transducer configured to receive an incident signal and produce an output signal as a function of the incident signal. As known in the art, the output signal has a −3 dB point. The transducer system also has circuitry operatively coupled with the transducer. The circuitry includes an amplifier with an output configured to produce an amplified signal as a function of the output signal. In addition, the circuitry further has a positive feedback loop and a negative feedback loop that both are electrically coupled between the transducer and the amplifier. The positive feedback loop is configured to move the −3 dB point in a first frequency direction. Conversely, the negative feedback loop is configured to move the −3 dB point in a second frequency direction. Preferably, the first and second frequency directions are different.
Public/Granted literature
- US20210360347A1 TRANSDUCER SYSTEM WITH THREE DECIBEL FEEDBACK LOOP Public/Granted day:2021-11-18
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