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1. 发明公开

US20240264003A1 METHODS AND SYSTEMS FOR THERMAL IMAGE SENSING 审中-公开
公开(公告)号：US20240264003A1
公开(公告)日：2024-08-08
申请号：US18435118
申请日：2024-02-07
申请人： OWL AUTONOMOUS IMAGING, INC.
发明人： Fatemeh Ataei , Eugene M. Petillli
IPC分类号： G01J5/02 , G01J5/00 , H03M3/00
CPC分类号： G01J5/026 , H03M3/47 , H03M3/49 , G01J2005/0077
摘要： Methods and systems for thermal image sensing are disclosed. A method involves controlling a current (IACT) from a detector of a thermal image sensor with a first pulse width modulated (PWM) signal (PWMACT) for gain control, controlling a current (IREF) from a reference source of the thermal image sensor with a second PWM signal (PWMFEEDBACK) for gain control and for offset correction, wherein the second PWM signal (PWMFEEDBACK) is generated in response to a digital output (DQ) that is fed back from an analog to digital conversion circuit, and providing a current (ISUM), which is the sum of the current (IACT) and the current (IREF), to the analog to digital conversion circuit.

2. 发明授权

US10880646B2 Microphone assembly with digital feedback loop 有权
公开(公告)号：US10880646B2
公开(公告)日：2020-12-29
申请号：US16685359
申请日：2019-11-15
申请人： Knowles Electronics, LLC
发明人： Mohammad Shajaan , Claus Erdmann Fürst , Per Flemming Høvesten , Kim Spetzler Berthelsen , Henrik Thomsen
IPC分类号： H04R3/00 , H03M1/00 , H03M3/00 , H04R3/02 , H04R3/04 , H03F3/70 , H03F3/34 , H03G3/30 , H03M1/18 , H04R1/04
CPC分类号： H04R3/02 , H04R3/04 , H03F3/34 , H03F3/70 , H03G3/30 , H03M1/181 , H03M3/464 , H03M3/48 , H03M3/49 , H04R1/04
摘要： A microphone assembly includes a transducer element and a processing circuit. The processing circuit includes an analog-to-digital converter (ADC) configured to receive, sample and quantize a microphone signal generated by the transducer element to generate a corresponding digital microphone signal. The processing circuit includes a feedback path including a digital loop filter configured to receive and filter the digital microphone signal to provide a first digital feedback signal and a digital-to-analog converter (DAC) configured to convert the first digital feedback signal into a corresponding analog feedback signal. The processing circuit additionally includes a summing node at the transducer output configured to combine the microphone signal and the analog feedback signal.

3. 发明申请

US20160314805A1 ANALOG-TO-DIGITAL CONVERTER (ADC) DYNAMIC RANGE ENHANCEMENT FOR VOICE-ACTIVATED SYSTEMS 有权
标题翻译：模拟数字转换器（ADC）语音激活系统的动态范围增强
公开(公告)号：US20160314805A1
公开(公告)日：2016-10-27
申请号：US14696172
申请日：2015-04-24
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Yousof Mortazavi , Ramin Zanbaghi , Aaron Brennan , John L. Melanson
IPC分类号： G10L25/78 , G10L15/34 , G10L21/034 , G10L15/22
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.
摘要翻译：通过动态调整语音激活的系统的输入路径的配置，可以提高语音激活的系统的动态范围和功率效率。在一个实施例中，可以通过具有第一配置的语音激活系统的输入路径来接收音频的第一部分。可以确定音频的第一部分的特性，并且可以基于所确定的特性将输入路径调整到第二配置。然后可以通过具有第二配置的输入路径接收第二部分音频，并且可以在音频的第二部分上执行语音分析。

4. 发明授权

US09306610B2 Active antenna array for a mobile communications network with a plurality of gain switches and a method for adjusting a signal level of individual radio signals 有权
标题翻译：用于具有多个增益开关的移动通信网络的有源天线阵列和用于调整各个无线电信号的信号电平的方法
公开(公告)号：US09306610B2
公开(公告)日：2016-04-05
申请号：US13915082
申请日：2013-06-11
申请人： Peter Kenington
发明人： Peter Kenington
IPC分类号： H04B1/06 , H04B1/18 , H01Q3/26 , H03M1/12 , H03M3/00 , H03M1/18
CPC分类号： H04B1/18 , H01Q3/26 , H03M1/123 , H03M1/185 , H03M3/466 , H03M3/49
摘要： An active antenna array for a mobile communications network and a method for receiving radio signals is disclosed. The active antenna array has a plurality of antenna elements for relaying radio signals, a plurality of first amplifiers for amplifying a plurality of individual receive signals a plurality of first analog-to-digital converters and a plurality of first gain switches located between one of the plurality of first analog-to-digital converters and the plurality of first amplifiers. A digital signal processor is connected to outputs of the plurality of first analog-to-digital converters and has a common gain switch control line connected to at least two of the plurality of first switches for controlling the gain of the first gain switches.
摘要翻译：公开了一种用于移动通信网络的有源天线阵列和用于接收无线电信号的方法。有源天线阵列具有用于中继无线电信号的多个天线元件，用于放大多个单独的接收信号的多个第一放大器，多个第一模数转换器和多个第一增益开关，位于多个第一模数转换器和多个第一放大器。数字信号处理器连接到多个第一模数转换器的输出端，并且具有连接到多个第一开关中的至少两个的公共增益开关控制线，用于控制第一增益开关的增益。

5. 发明申请

US20130259242A1 CONTROL OF A MICROPHONE 有权
标题翻译：麦克风的控制
公开(公告)号：US20130259242A1
公开(公告)日：2013-10-03
申请号：US13798846
申请日：2013-03-13
申请人： NXP B.V.
发明人： Han Martijn SCHUURMANS , Maarten Wilhelmus Henricus Marie VAN DOMMELEN
IPC分类号： H04R3/00
CPC分类号： H04R3/00 , H03M1/183 , H03M3/486 , H03M3/49 , H04R3/02 , H04R2410/00
摘要： A microphone circuit has a clip detection circuit which detects when an analogue to digital converter output has reached a threshold. A variable attenuator 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. An overrule function is also provided so that the clip detection AGC control can be inhibited or controlled differently.
摘要翻译：麦克风电路具有检测模拟数字转换器输出何时达到阈值的片段检测电路。可变衰减器基于片段检测电路输出进行控制。因此，反馈基于ADC输出电平，并且可以实现该信号的处理而不需要信号的基带处理 - 它可以简单地基于ADC输出的状态。还提供了一个推翻功能，使得可以不同地抑制或控制剪辑检测AGC控制。

6. 发明申请

US20100164773A1 ELECTRONIC DEVICE AND INTEGRATED CIRCUIT COMPRISING A DELTA-SIGMA CONVERTER AND METHOD THEREFOR 有权
标题翻译：包含三角形转换器的电子设备和集成电路及其方法
公开(公告)号：US20100164773A1
公开(公告)日：2010-07-01
申请号：US12293744
申请日：2006-03-23
申请人： Patrick Clement , Maher Kayal , Sergio Pesenti
发明人： Patrick Clement , Maher Kayal , Sergio Pesenti
IPC分类号： H03M3/00
CPC分类号： H03M3/48 , H03M1/181 , H03M1/20 , H03M3/49
摘要： An integrated circuit comprises a delta-sigma modulator incorporating a delta-sigma modulation loop having an analog-to-digital converter in a forward path and a digital-to-analog converter in a feedback path such that the ADC is arranged to receive samples of an analog input signal. The ADC is operably coupled to auto-ranging logic arranged to shift a digital output signal from the ADC representative of the analog input signal to counteract an effect of an input variation of the analog input signal. In this manner, the application of auto-ranging logic with a self-recovery technique supports a reduction of the number of comparators required in a multi-bit delta-sigma ADC.
摘要翻译：集成电路包括并入具有正向通路中的模数转换器和反馈路径中的数模转换器的Δ-Σ调制环的Δ-Σ调制器，使得ADC被布置为接收模拟输入信号。 ADC可操作地耦合到自动测距逻辑，其布置成从表示模拟输入信号的ADC移位数字输出信号，以抵消模拟输入信号的输入变化的影响。以这种方式，具有自恢复技术的自动量程逻辑的应用支持减少多位Δ-ΣADC中所需的比较器的数量。

7. 发明申请

US20100156635A1 Signal Level Detection Method 有权
标题翻译：信号电平检测方法
公开(公告)号：US20100156635A1
公开(公告)日：2010-06-24
申请号：US12714449
申请日：2010-02-27
申请人： Matthew Douglas Brown , Sheldon James Hood , Guy Jacque Fortier , Stan Harry Blakey
发明人： Matthew Douglas Brown , Sheldon James Hood , Guy Jacque Fortier , Stan Harry Blakey
IPC分类号： G08B21/00
CPC分类号： H03G3/001 , G01R19/04 , G01R19/2506 , H03G3/3042 , H03K5/1532 , H03M3/43 , H03M3/456 , H03M3/486 , H03M3/49
摘要： An electronic signal level detection system and method are provided. The method receives an analog input signal having a variable voltage and compares the input signal voltage to a threshold. A detection signal is generated for input signal voltages exceeding the threshold in a periodic first time frame. In a second periodic time frame (following the first time frame), a count is updated in response to the generated detection signals. The count is used to create a metric representative of the difference between the input signal voltage and the threshold. The count is incremented in response to the generating a detection signal (“1”) in the first time frame, and decremented in response to not generating a detection signal (“0”) in the first time frame.
摘要翻译：提供电子信号电平检测系统和方法。该方法接收具有可变电压的模拟输入信号，并将输入信号电压与阈值进行比较。在周期性第一时间帧中，对超过阈值的输入信号电压产生检测信号。在第二周期时间帧（在第一时间帧之后），响应于所生成的检测信号来更新计数。该计数用于创建表示输入信号电压和阈值之间的差异的度量。响应于在第一时间帧中产生检测信号（“1”），计数增加，并且响应于在第一时间帧中不产生检测信号（“0”）而递减计数。

8. 发明申请

US20090066549A1 SIGMA DELTA MODULATOR 有权
标题翻译： SIGMA DELTA调制器
公开(公告)号：US20090066549A1
公开(公告)日：2009-03-12
申请号：US10599343
申请日：2005-04-11
申请人： Henrik Thomsen , Claus Erdmann Fuerst
发明人： Henrik Thomsen , Claus Erdmann Fuerst
IPC分类号： H03M3/00
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.
摘要翻译：一种利用建立Σ-Δ调制器的信号传递函数STF和量化噪声传递函数NTF的环路来控制Σ-Δ调制器的方法，其中Σ-Δ调制器接收输入信号x（n）并且响应于输入信号提供调制输出信号y（n）。该方法的特征在于包括响应于与输入信号相关的信号特征A（n），控制Σ-Δ调制器改变量化噪声传递函数NTF的步骤。

9. 发明申请

US20090033533A1 SIGMA DELTA MODULATOR AND RELATED METHOD THEREOF 有权
标题翻译： SIGMA DELTA调制器及其相关方法
公开(公告)号：US20090033533A1
公开(公告)日：2009-02-05
申请号：US12179556
申请日：2008-07-24
申请人： Hung-Chuan Pai , Chao-Tung Yang
发明人： Hung-Chuan Pai , Chao-Tung Yang
IPC分类号： H03M3/02
CPC分类号： H03M3/484 , H03M3/43 , H03M3/49
摘要： A sigma-delta modulator includes a loop filter, a single bit quantizer, a single bit DAC, an adder. The loop filter is for filtering a summed signal to generate a filtered signal. The single bit quantizer is coupled to the loop filter, for performing a quantization process to the filtered signal to generate a quantized signal. The single bit DAC is coupled to the single bit quantizer, has an adjustable configuration, and is for generating a feedback signal according to the quantized signal and the configuration thereof. The adder is coupled to the loop filter and the single bit DAC, for summing an input signal and the feedback signal to generate the summed signal.
摘要翻译： Σ-Δ调制器包括环路滤波器，单比特量化器，单比特DAC，加法器。环路滤波器用于滤波求和信号以产生滤波信号。单位量化器耦合到环路滤波器，用于对经滤波的信号执行量化处理以产生量化信号。单位DAC耦合到单位量化器，具有可调配置，并且用于根据量化信号及其配置产生反馈信号。加法器耦合到环路滤波器和单位DAC，用于对输入信号和反馈信号求和以产生求和信号。

10. 发明申请

US20080007442A1 Range compression in oversampling analog-to-digital converters using differential input signals 有权
公开(公告)号：US20080007442A1
公开(公告)日：2008-01-10
申请号：US11483390
申请日：2006-07-07
申请人： Florin A. Oprescu
发明人： Florin A. Oprescu
IPC分类号： H03M1/12
CPC分类号： H03M3/49 , H03M3/43 , H03M3/456
摘要： An analog-to-digital converter according to the invention is provided. The analog-to-digital converter preferably includes an analog input signal, a first reference signal, a second reference signal, and a range compression signal. The range compression signal is preferably characterized by a magnitude greater than the first reference signal and smaller than the second reference signal. In addition, when the analog input signal is sampled N times and the range compression signal is sampled N1 times, a compression factor related at least in part to the ratio N1/(N+N1) is obtained.

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