Invention Grant
US09332345B1 Use of microphone capacitance as a switched capacitor in an input network of a delta-sigma modulator
有权
在Δ-Σ调制器的输入网络中使用麦克风电容作为开关电容
- Patent Title: Use of microphone capacitance as a switched capacitor in an input network of a delta-sigma modulator
- Patent Title (中): 在Δ-Σ调制器的输入网络中使用麦克风电容作为开关电容
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Application No.: US14248035Application Date: 2014-04-08
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Publication No.: US09332345B1Publication Date: 2016-05-03
- Inventor: John L. Melanson , John C. Tucker
- Applicant: Cirrus Logic, Inc.
- Applicant Address: US TX Austin
- Assignee: Cirrus Logic, Inc.
- Current Assignee: Cirrus Logic, Inc.
- Current Assignee Address: US TX Austin
- Agency: Jackson Walker L.L.P.
- Main IPC: H04R3/00
- IPC: H04R3/00 ; H03M3/00 ; H04R19/04
Abstract:
In accordance with embodiments of the present disclosure, a method and apparatus for providing a digitized microphone signal to a digital processing device may include an analog signal path portion, a digital signal path portion, and a control circuit. The analog signal path portion may have an audio input configured to receive an analog input signal indicative of audio sounds incident upon an audio transducer. The digital signal path portion may have an analog-to-digital converter for converting the analog microphone signal to the digitized microphone signal. The control circuit may be configured to control a magnitude of the analog input signal or a derivative thereof in order to reduce audio distortion occurring in either or both of the analog signal path portion and the digital signal path portion.
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