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1. 发明申请

WO2004066540A3 SIGNAL PROCESSING SYSTEM WITH BASEBAND NOISE MODULATION AND NOISE FOLD BACK REDUCTION 审中-公开
标题翻译：信号处理系统，具有基带噪声调制和噪声缩减功能
公开(公告)号：WO2004066540A3
公开(公告)日：2004-11-11
申请号：PCT/US2004001514
申请日：2004-01-21
申请人： CIRRUS LOGIC INC , PLISCH MARJORIE R , MELANSON JOHN L , HODAPP STEPHEN T , RANGAN GIRI N K
发明人： PLISCH MARJORIE R , MELANSON JOHN L , HODAPP STEPHEN T , RANGAN GIRI N K
IPC分类号： H03F1/02 , H03F1/26 , H03F3/21 , H03F3/217 , H03F3/38 , H03M3/04 , H04B14/06
CPC分类号： H03M3/34 , H03F1/02 , H03F1/26 , H03F3/211 , H03F3/217 , H03F3/2175 , H03F3/38 , H03F2200/331 , H03M3/50
摘要： A digital-to-analog converter ("DAC") system utilized chopping modulation technology to remove 1/f and other baseband noise from a baseband of a signal of interest. Chopping modulation and demodulation circuitry of the DAC operate at a chopping frequency equal to approximately one-half of a digital input signal sampling frequency. Chopping at one-half the sampling frequency allows fold back into the baseband of the input signal's frequency components and reduces fold back of noise, such as quantization noise, residing outside the baseband. In a further embodiment, a notch filter attenuates signals having frequencies around the chopping frequency prior to chopping to reduce fold back of noise into the baseband due to parasitic modulation. Coordination of chopping timing also reduces noises in the output of the DAC system.
摘要翻译：数模转换器（“DAC”）系统利用斩波调制技术从感兴趣信号的基带去除1 / f和其它基带噪声。 DAC的斩波调制和解调电路以等于数字输入信号采样频率的大约一半的斩波频率工作。以采样频率的一半斩波允许折回到输入信号的频率分量的基带，并减少驻留在基带外的诸如量化噪声的噪声的折返。在另一实施例中，陷波滤波器在斩波之前衰减具有围绕斩波频率的频率的信号，以减少由于寄生调制而导致的基带的噪声折回。斩波定时的协调还可以降低DAC系统输出的噪声。

2. 发明申请

WO2004064485A2 SIGNAL PROCESSING SYSTEM WITH BASEBAND NOISE MODULATION AND NOISE FILTERING 审中-公开
标题翻译：基带噪声调制和噪声滤波的信号处理系统
公开(公告)号：WO2004064485A2
公开(公告)日：2004-08-05
申请号：PCT/US2004001916
申请日：2004-01-21
申请人： CIRRUS LOGIC INC , MELANSON JOHN L , HODAPP STEPHEN T , RANGAN GIRI N K
发明人： MELANSON JOHN L , HODAPP STEPHEN T , RANGAN GIRI N K
IPC分类号： H03M1/66 , H03M3/00 , H03M3/04 , H03M7/36
CPC分类号： H03M7/3006 , H03M3/344 , H03M3/50 , H03M7/3026
摘要： A digital-to-analog converter ("DAC") system utilizes notch filters and chopping modulation technology to remove 1/f and other baseband noise from a baseband of a signal of interest. Chopping modulation and demodulation circuitry of the DAC operate at a chopping frequency and all harmonics equal to approximately one-half of a digital input signal sampling frequency. A notch filter attenuates signals having frequencies around the chopping frequency prior to chopping to reduce fold back of noise into the baseband due to parasitic modulation. Another notch filter attenuating signals having frequencies around twice the chopping frequency further reduces fold back of noise into the baseband.
摘要翻译：数模转换器（“DAC”）系统利用陷波滤波器和斩波调制技术来消除感兴趣信号的基带中的1 / f和其他基带噪声。 DAC的调制和解调电路斩波工作在斩波频率，所有谐波大约等于数字输入信号采样频率的一半。陷波滤波器在斩波之前衰减具有斩波频率附近的频率的信号，以减少由于寄生调制而导致的噪声折回到基带。另一种陷波滤波器衰减具有大约两倍斩波频率的频率的信号，进一步减少了噪声折回到基带。

3. 发明申请

WO2016032598A3 LOW-POWER ANALOG-TO-DIGITAL CONVERTER FOR SENSING GEOPHONE SIGNALS 审中-公开
标题翻译：低功耗模拟数字转换器，用于感应地球信号
公开(公告)号：WO2016032598A3
公开(公告)日：2016-07-14
申请号：PCT/US2015036151
申请日：2015-06-17
申请人： CIRRUS LOGIC INC
发明人： MELANSON JOHN L , SINGH RAHUL , DRAKSHAPALLI PRASHANTH , BRUMMEL DALE , HODAPP STEPHEN T
IPC分类号： G01V1/00 , H03M3/04
CPC分类号： H03M3/424 , G01V1/181 , H03M1/066 , H03M3/388 , H03M3/454
摘要： A low power analog-to-digital converter configured to sense sensor signals may include a loop filter and a feedback digital-to-analog converter. The loop filter may have a loop filter input configured to receive an input current signal from a sensor and generate an output signal responsive to the input current signal. The feedback digital-to-analog converter may have a feedback output configured to generate a current-mode or charge-mode feedback output signal responsive to the output signal, the feedback output coupled to the loop filter input in order to combine the input current signal and the feedback output signal at the input.
摘要翻译：被配置为感测传感器信号的低功率模数转换器可以包括环路滤波器和反馈数模转换器。环路滤波器可以具有环路滤波器输入，其被配置为从传感器接收输入电流信号，并响应于输入电流信号产生输出信号。反馈数模转换器可以具有被配置为响应于输出信号产生电流模式或电荷模式反馈输出信号的反馈输出，反馈输出耦合到环路滤波器输入，以便组合输入电流信号和输入端的反馈输出信号。

4. 发明申请

WO2016003648A4 SYSTEMS AND METHODS OF ELEMENT SCRAMBLING FOR COMPENSATION AND CALIBRATION OF ANALOG-TO-DIGITAL CONVERTER FEEDBACK 审中-公开
标题翻译：元件数字转换器反馈补偿和校准元件的系统和方法
公开(公告)号：WO2016003648A4
公开(公告)日：2016-05-06
申请号：PCT/US2015036211
申请日：2015-06-17
申请人： CIRRUS LOGIC INC
发明人： MELANSON JOHN L , MEHTA JAIMIN , HODAPP STEPHEN T
IPC分类号： H03M1/06 , H03M1/10 , H03M1/66
CPC分类号： H03M1/1038 , H03M1/06 , H03M1/0665 , H03M1/0863 , H03M1/10 , H03M1/1009 , H03M1/66 , H03M3/458
摘要： An apparatus may include a scrambler element configured to receive an input signal and generate a scrambled thermometer code-like signal having a plurality of bits based on the input signal and having a plurality of possible quantization values. The scrambler element may generate at least one equivalent code of the scrambled thermometer code-like signal for each possible quantization value. For each of one or more of the possible quantization values, the scrambler element may be configured to generate a plurality of possible equivalent codes of the scrambled thermometer code-like signal. Responsive to the input signal indicating a change in quantization value of the scrambled thermometer code-like signal, the scrambler element may change the scrambled thermometer code-like signal by transitioning the smallest possible number of the plurality of bits of the scrambled thermometer code-like signal to change quantization value of the scrambled thermometer code-like signal in accordance with the input signal.
摘要翻译：装置可以包括扰频器元件，其被配置为接收输入信号并且基于输入信号生成具有多个比特的加扰温度计类似码字的信号，并且具有多个可能的量化值。加扰器元件可以为每个可能的量化值产生加扰的温度计代码样信号的至少一个等效代码。对于一个或多个可能的量化值中的每一个，加扰器元件可以被配置为产生加扰的温度计编码类信号的多个可能的等效代码。响应于指示加扰的温度计编码类信号的量化值的改变的输入信号，加扰器元件可以通过转换加扰的温度计代码样信号的多个比特的最小可能数来改变加扰的温度计代码样信号信号以根据输入信号改变加扰的温度计代码样信号的量化值。

5. 发明申请

WO2016003648A3 SYSTEMS AND METHODS OF ELEMENT SCRAMBLING FOR COMPENSATION AND CALIBRATION OF ANALOG-TO-DIGITAL CONVERTER FEEDBACK 审中-公开
标题翻译：用于补偿和校准模拟数字转换器反馈的元件扰动系统和方法
公开(公告)号：WO2016003648A3
公开(公告)日：2016-03-10
申请号：PCT/US2015036211
申请日：2015-06-17
申请人： CIRRUS LOGIC INC
发明人： MELANSON JOHN L , MEHTA JAIMIN , HODAPP STEPHEN T
IPC分类号： H03M1/06 , H03M1/10 , H03M1/66
CPC分类号： H03M1/1038 , H03M1/06 , H03M1/0665 , H03M1/0863 , H03M1/10 , H03M1/1009 , H03M1/66 , H03M3/458
摘要： An apparatus may include a scrambler element configured to receive an input signal and generate a scrambled thermometer code-like signal having a plurality of bits based on the input signal and having a plurality of possible quantization values. The scrambler element may generate at least one equivalent code of the scrambled thermometer code-like signal for each possible quantization value. For each of one or more of the possible quantization values, the scrambler element may be configured to generate a plurality of possible equivalent codes of the scrambled thermometer code-like signal. Responsive to the input signal indicating a change in quantization value of the scrambled thermometer code-like signal, the scrambler element may change the scrambled thermometer code-like signal by transitioning the smallest possible number of the plurality of bits of the scrambled thermometer code-like signal to change quantization value of the scrambled thermometer code-like signal in accordance with the input signal.
摘要翻译：一种装置可以包括：扰乱器元件，被配置为接收输入信号并且基于输入信号并且具有多个可能的量化值来生成具有多个比特的扰频温度计码类信号。扰乱器单元可针对每个可能的量化值生成扰频温度计码形信号的至少一个等效码。对于一个或多个可能的量化值中的每一个，扰频器单元可以被配置为生成扰频温度计码形信号的多个可能的等效码。响应于指示加扰温度计码类信号的量化值变化的输入信号，加扰器元件可以通过将加扰温度计的多个比特的最小可能数量的码样式转换来改变加扰温度计码类信号信号以根据输入信号改变加扰温度计码状信号的量化值。

6. 发明公开

EP1590888A4 SIGNAL PROCESSING SYSTEM WITH BASEBAND NOISE MODULATION AND NOISE FILTERING 有权
标题翻译：与基带噪声调制和噪声滤波信号处理系统
公开(公告)号：EP1590888A4
公开(公告)日：2011-01-12
申请号：EP04704139
申请日：2004-01-21
申请人： CIRRUS LOGIC INC
发明人： MELANSON JOHN L , HODAPP STEPHEN T , RANGAN GIRI N K
IPC分类号： H03M1/66 , H03M3/00 , H03M3/04 , H03M7/36
CPC分类号： H03M7/3006 , H03M3/344 , H03M3/50 , H03M7/3026

7. 发明公开

EP1590905A4 SIGNAL PROCESSING SYSTEM WITH BASEBAND NOISE MODULATION AND NOISE FOLD BACK REDUCTION 有权
标题翻译：与基带噪声调制和降噪FOLDBACK信号处理系统
公开(公告)号：EP1590905A4
公开(公告)日：2011-01-12
申请号：EP04704054
申请日：2004-01-21
申请人： CIRRUS LOGIC INC
发明人： PLISCH MARJORIE R , MELANSON JOHN L , HODAPP STEPHEN T , RANGAN GIRI N K
IPC分类号： H03F1/02 , H03F1/26 , H03F3/21 , H03F3/217 , H03F3/38 , H03M3/04 , H04B14/06
CPC分类号： H03M3/34 , H03F1/02 , H03F1/26 , H03F3/211 , H03F3/217 , H03F3/2175 , H03F3/38 , H03F2200/331 , H03M3/50

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