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公开(公告)号:US20120328129A1
公开(公告)日:2012-12-27
申请号:US13580153
申请日:2011-03-16
申请人: Han M. Schuurmans
发明人: Han M. Schuurmans
IPC分类号: H04R3/00
CPC分类号: H03M1/183 , H03M3/48 , H04R3/02 , H04R2410/00
摘要: A microphone circuit has a clip detection circuit (30) which detects when an analogue to digital converter (ADC, 12) output has reached a threshold. A variable capacitance (34a, 34b, 34c, 34d), which functions as a variable input load associated with the microphone (11), is controlled based on the clip detection circuit output, the feedback is thus based on the ADC out-put level, and the processing of this signal can be implemented without requiring baseband processing of the signal—it can simply be based on a state of the ADC output.
摘要翻译: 麦克风电路具有检测模拟数字转换器(ADC,12)输出何时达到阈值的片段检测电路(30)。 用作与麦克风(11)相关联的可变输入负载的可变电容(34a,34b,34c,34d)基于片段检测电路输出来控制,因此反馈基于ADC输出电平 ,并且可以在不需要对信号进行基带处理的情况下实现该信号的处理 - 其可以简单地基于ADC输出的状态。
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公开(公告)号:US09419640B2
公开(公告)日:2016-08-16
申请号:US13580153
申请日:2011-03-16
申请人: Han M. Schuurmans
发明人: Han M. Schuurmans
CPC分类号: H03M1/183 , H03M3/48 , H04R3/02 , H04R2410/00
摘要: A microphone circuit has a clip detection circuit (30) which detects when an analog to digital converter (ADC, 12) output has reached a threshold. A variable capacitance (34a, 34b, 34c, 34d), which functions as a variable input load associated with the microphone (11), is controlled based on the clip detection circuit output, the feedback is thus based on the ADC output level, and the processing of this signal can be implemented without requiring baseband processing of the signal—it can simply be based on a state of the ADC output.
摘要翻译: 麦克风电路具有检测模数转换器(ADC,12)输出何时达到阈值的片检测电路(30)。 用作与麦克风(11)相关联的可变输入负载的可变电容(34a,34b,34c,34d)基于剪辑检测电路输出来控制,因此反馈基于ADC输出电平,以及 可以在不需要信号的基带处理的情况下实现该信号的处理 - 其可以简单地基于ADC输出的状态。
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公开(公告)号:US5057841A
公开(公告)日:1991-10-15
申请号:US548347
申请日:1990-06-29
CPC分类号: H03M1/0695 , H03M1/46
摘要: A successive approximation analog-to-digital converter whose susceptibility to errors is reduced by the use of overlapping measurement ranges in the successive conversion steps.
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