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1. 发明公开

EP1894302A4 RAPID RESPONSE CURRENT MEASUREMENT SYSTEM AND METHOD 有权
标题翻译：具有更快的响应速度和程序电流测量系统
公开(公告)号：EP1894302A4
公开(公告)日：2010-04-07
申请号：EP06784947
申请日：2006-06-16
申请人： ANALOG DEVICES INC
发明人： SHERRY ADRIAN
IPC分类号： H03M1/12
CPC分类号： H03M1/187 , H03M3/486 , H03M3/49

2. 发明公开

EP1743429A1 SIGMA DELTA MODULATOR 审中-公开
标题翻译： Σ-Δ调制
公开(公告)号：EP1743429A1
公开(公告)日：2007-01-17
申请号：EP05715164.9
申请日：2005-04-11
申请人： Audioasics A/S
发明人： THOMSEN, Henrik
IPC分类号： H03M3/00 , H03M3/04
CPC分类号： H03M3/484 , H03M3/45 , H03M3/454 , H03M3/482 , H03M3/49 , H03M3/492
摘要： A method of controlling a sigma delta modulator with a loop which establishes a signal transfer function, STF, and a quantization noise transfer function, NTF, of the sigma delta modulator, wherein the sigma delta modulator receives an input signal, x(n), and provides a modulated output signal, y(n) in response to the input signal. The method is characterized in comprising the step of controlling the sigma delta modulator to change the quantization noise transfer function, NTF, in response to a signal feature, A(n), which is correlated with the input signal.

3. 发明公开

EP1328938A1 AUDIO SIGNAL COMPRESSION 审中-公开
标题翻译： AUDIOSIGNALKOMPRESSION
公开(公告)号：EP1328938A1
公开(公告)日：2003-07-23
申请号：EP01978350.5
申请日：2001-09-06
申请人： Koninklijke Philips Electronics N.V.
发明人： REEFMAN, Derk , NUIJTEN, Petrus, A., C., M.
IPC分类号： G11B20/00 , G11B20/10 , H04B14/06 , H03M7/30
CPC分类号： H03M3/482 , G11B20/00007 , G11B20/10527 , G11B2020/00065 , H03M3/406 , H03M3/43 , H03M3/452 , H03M3/49 , H04B14/064
摘要： Estimating a compression gain obtainable in compressing a given audio signal, comprising extracting a signal power in a selected frequency band of the given audio signal, and obtaining an estimation of the compression gain by correlation with the extracted signal power.

4. 发明授权

EP2096759B1 SIGMA-DELTA TYPE ANALOG-TO-DIGITAL (AD) CONVERTER AND ANGULAR VELOCITY SENSOR USING SAME 有权
标题翻译： SIGMA-DELTA型模拟 - 数字（AD）转换器和角速度传感器使用相同
公开(公告)号：EP2096759B1
公开(公告)日：2018-01-03
申请号：EP08702828.8
申请日：2008-01-25
申请人： Panasonic Intellectual Property Management Co., Ltd.
发明人： MURAKAMI, Hideyuki , KAWAI, Takashi , NABETANI, Kouji
IPC分类号： H03M3/02 , G01C19/5649
CPC分类号： G01C19/56 , G01C19/5649 , H03M3/326 , H03M3/368 , H03M3/43 , H03M3/456 , H03M3/474 , H03M3/486 , H03M3/49
摘要： An angular velocity sensor with a stable output characteristic using a sigma-delta type analog-to-digital converter comprising an integrator unit (62) for integrating electric charges output from an input switching device (44) and a digital-to-analog converter unit (48) and holding at least two integrated values, a comparator unit (63) for comparing at least the two integrated values output from the integrator unit (62) with a predetermined value, and an arithmetic operation unit (73) for operating an output signal of the comparator unit (63), the arithmetic operation unit (73) provided with a differential operation unit (70) for computing a difference between at least two comparison signals output from comparator unit (63).

5. 发明公开

EP2421281A2 Circuit and method for monitoring a capacitive signal source 审中-公开
标题翻译：电路和方法用于监测电容信号源
公开(公告)号：EP2421281A2
公开(公告)日：2012-02-22
申请号：EP10179514.4
申请日：2010-09-24
申请人： NXP B.V.
发明人： Van Den Boom, Jeroen , van Dommelen, Maarten Wilhelmus Henricus , Schuurmans, Han Martijn
IPC分类号： H04R19/04
CPC分类号： H03M1/1295 , H03M3/49 , H04R19/005
摘要： A circuit for monitoring capacitive signal sources, and particularly detecting changes in capacitance of a variable capacitor, comprises the capacitive signal source (40) and a differential analogue to digital converter (42). A voltage source (44) provides a DC voltage (Vcm) to a first input terminal of the differential analogue to digital converter, and the capacitive signal source(40) is connected to the other terminal of the differential analogue to digital converter (42). A feedback path (46) low pass filters the output of the differential analogue to digital converter (42) to derive a DC offset value (Vcmfb) and couples the DC offset value to the other terminal of the differential analogue to digital converter (42).
摘要翻译：一种用于监测电容信号源，特别是检测变化的可变电容器的电容电路，包括：电容性信号源（40）和差动模拟到数字转换器（42）。的电压源（44）提供的直流电压（VCM）到差动模拟到数字转换器的第一输入端，以及所述电容的信号源（40）被连接到差分模拟到数字转换器的另一个端子（42），反馈路径（46）低通滤波器的差动模拟到数字转换器（42）的输出导出的DC偏移值（Vcmfb）和耦合所述DC偏移值与所述差动模拟到数字转换器的另一个端子（42），

6. 发明授权

EP2176955B1 ADAPTIVE DYNAMIC RANGE CONTROL 有权
标题翻译：动态范围的自适应控制
公开(公告)号：EP2176955B1
公开(公告)日：2011-06-15
申请号：EP08727788.5
申请日：2008-01-16
申请人： QUALCOMM Incorporated
发明人： LEE, Chong U. , JULIAN, David Jonathan , GARUDADRI, Harinath , MAJUMDAR, Somdeb
IPC分类号： H03M3/02
CPC分类号： H03M3/49
摘要： Apparatus and method for processing signals. A sigma-delta modulator is used. An adaptive dynamic range controller is configured to adaptively adjust the dynamic range of a signal output from the sigma-delta modulator.

7. 发明公开

EP1869772A1 SIGNAL STRENGTH INDICATOR 审中-公开
标题翻译：指示剂的信号强度
公开(公告)号：EP1869772A1
公开(公告)日：2007-12-26
申请号：EP06727754.1
申请日：2006-03-28
申请人： NXP B.V.
发明人： VAN VELDHOVEN, Robert
IPC分类号： H03M1/18
CPC分类号： H03M3/362 , H03M3/424 , H03M3/486 , H03M3/49
摘要： A device is for digitally processing an input signal that is susceptible to variations in signal strength. The signal (48) is analog to digital converted into a bitstream signal (47), the bitstream signal representing the input signal by consecutive digital values. The device has a signal strength detection circuit (32) for generating a control signal indicative for an overload condition in which the signal strength exceeds a input range of the analog to digital converter, e.g. a sigma-delta modulator. The signal strength detection circuit detects, in the bitstream signal, a sequence (49,50) of adjacent and equal digital values, the sequence having at least a predetermined length. The circuit detects the overload condition effectively and fast, avoiding the delay of signal strength detection in a digital processor.

8. 发明公开

EP1805896A1 SIGNAL STRENGTH INDICATOR 审中-公开
标题翻译： SIGNALSTÄRKENINDIKATOR
公开(公告)号：EP1805896A1
公开(公告)日：2007-07-11
申请号：EP05788893.5
申请日：2005-10-11
申请人： Koninklijke Philips Electronics N.V.
发明人： VAN VELDHOVEN, Robert H.M., Société Civile SPID
IPC分类号： H03M3/04
CPC分类号： H03M3/486 , H03M3/452 , H03M3/49
摘要： A signal processing circuit has an analog to digital converter (31) for providing a digital signal to a processor (15) from an analog input signal that is susceptible to variations in signal power, e.g. from a radio front end (12). The device has a variable gain amplifier (13) controlled by a gain control signal based on detected signal strength. The analog to digital converter has a loop comprising a loop filter for processing the input signal. A signal strength detection circuit (32) is provided for generating the gain control signal, which signal strength detection circuit has loop signal detector for detecting the signal strength from the loop. Hence a received signal strength indicator RSSI is directly coupled to the analog to digital converter (31), avoiding the delay of signal strength detection in the digital processor.

9. 发明公开

EP1719245A2 SWITCHING POWER AMPLIFIER USING A FREQUENCY TRANSLATING DELTA SIGMA MODULATOR 审中-公开
标题翻译：开关电源放大器，频率转换Δ-Σ调制器
公开(公告)号：EP1719245A2
公开(公告)日：2006-11-08
申请号：EP05722805.8
申请日：2005-02-08
申请人： Prophesi Technologies Inc.
发明人： LEE, Wai , STAPLETON, Shawn , MEKECHUK, Kelly
IPC分类号： H03F3/217
CPC分类号： H03F3/217 , H03F2200/111 , H03F2200/331 , H03F2200/451 , H03M3/41 , H03M3/484 , H03M3/49
摘要： A radio frequency (RF) switching power amplifier comprises: a switching amplifier 203 to provide an amplified signal within an RF band; and a delta signal modulator (DSM) 207 that is operable; to control the switching amplifier in a feedback configuration, to process an input signal within an intermediate frequency (IF) band where the input signal corresponds to a base band signal and the amplified signal, and to provide an output signal within the RF band to drive the switching amplifier. Certain embodiments allow for or compensate for a floating or variable IF band and multiple RF bands.

10. 发明公开

EP3286837A1 ANALOG-TO-DIGITAL CONVERTER (ADC) DYNAMIC RANGE ENHANCEMENT FOR VOICE-ACTIVATED SYSTEMS 有权
公开(公告)号：EP3286837A1
公开(公告)日：2018-02-28
申请号：EP16724458
申请日：2016-04-04
申请人： CIRRUS LOGIC INT SEMICONDUCTOR LTD
发明人： MORTAZAVI YOUSOF , MELANSON JOHN L , ZANBACHI RAMIN , BRENNAN AARON
IPC分类号： H03M1/18 , G10L25/78
CPC分类号： G10L25/78 , G10L15/22 , G10L15/28 , G10L15/34 , G10L21/034 , G10L2015/223 , H03M1/185 , H03M3/49
摘要： The dynamic range and power efficiency of a voice-activated system may be improved by dynamically adjusting the configuration of the voice-activated system's input path. In one embodiment, a first portion of audio may be received through an input path of the voice-activated system having a first configuration. A characteristic of the first portion of audio may be determined and the input path may be adjusted to a second configuration based on the determined characteristic. A second portion of audio may then be received through the input path having the second configuration, and speech analysis may be performed on the second portion of audio.

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