专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

51. 发明授权

US07557741B2 Overload detection unit with signal strength indicator to indicate an overload condition 有权
标题翻译：具有信号强度指示器的过载检测单元表示过载状态
公开(公告)号：US07557741B2
公开(公告)日：2009-07-07
申请号：US11910451
申请日：2006-03-28
申请人： Robert Van Veldhoven
发明人： Robert Van Veldhoven
IPC分类号： H03M1/00
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.
摘要翻译：一种设备用于数字处理易受信号强度变化影响的输入信号。信号（48）被模拟数字转换成比特流信号（47），比特流信号通过连续的数字值表示输入信号。该装置具有信号强度检测电路（32），用于产生指示过载状态的控制信号，其中信号强度超过模数转换器的输入范围，例如，一个Σ-Δ调制器。信号强度检测电路在比特流信号中检测相邻和相等数字值的序列（49,50），该序列具有至少预定长度。该电路有效且快速地检测过载状况，避免了数字处理器中信号强度检测的延迟。

52. 发明申请

US20090121790A1 System and method for signal level detection 有权
标题翻译：用于信号电平检测的系统和方法
公开(公告)号：US20090121790A1
公开(公告)日：2009-05-14
申请号：US11983645
申请日：2007-11-09
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： H03G3/20 , H03K5/1532 , H03M1/70
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。

53. 发明申请

US20090021408A1 ADAPTIVE DYNAMIC RANGE CONTROL 有权
标题翻译：自适应动态范围控制
公开(公告)号：US20090021408A1
公开(公告)日：2009-01-22
申请号：US11843914
申请日：2007-08-23
申请人： Chong U. Lee , David Jonathan Julian , Harinath Garudadri , Somdeb Majumdar
发明人： Chong U. Lee , David Jonathan Julian , Harinath Garudadri , Somdeb Majumdar
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.
摘要翻译：信号处理装置及方法。使用Σ-Δ调制器。自适应动态范围控制器被配置为自适应地调整从Σ-Δ调制器输出的信号的动态范围。

54. 发明授权

US07453382B2 Method and apparatus for A/D conversion 有权
标题翻译：用于A / D转换的方法和装置
公开(公告)号：US07453382B2
公开(公告)日：2008-11-18
申请号：US11651925
申请日：2007-01-10
申请人： Andreas Wiesbauer , Luis Hernandez , David San Segundo Bello , Antonio Di Giandomenico
发明人： Andreas Wiesbauer , Luis Hernandez , David San Segundo Bello , Antonio Di Giandomenico
IPC分类号： H03M3/00
CPC分类号： H03M3/484 , H03M3/412 , H03M3/424 , H03M3/448 , H03M3/454 , H03M3/49
摘要： A method and an apparatus for converting an analog input signal into a digital output signal using a sigma-delta modulator architecture with a digital tracking filter. The digital tracking filter may have and order greater than one, and the signal and noise transfer functions of the sigma-delta modulator architecture are chosen to provide a sigma-delta modulator architecture with a high dynamic range even if a relatively low oversampling ratio is used.
摘要翻译：一种使用具有数字跟踪滤波器的Σ-Δ调制器架构将模拟输入信号转换为数字输出信号的方法和装置。数字跟踪滤波器可以具有大于1的数量跟踪滤波器，并且选择Σ-Δ调制器架构的信号和噪声传递函数以提供具有高动态范围的Σ-Δ调制器架构，即使使用相对较低的过采样比。

55. 发明授权

US07397403B2 Range compression in oversampling analog-to-digital converters using differential input signals 有权
标题翻译：使用差分输入信号的过采样模数转换器中的范围压缩
公开(公告)号：US07397403B2
公开(公告)日：2008-07-08
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： H03M1/00
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.
摘要翻译：提供了根据本发明的模拟 - 数字转换器。模数转换器优选地包括模拟输入信号，第一参考信号，第二参考信号和范围压缩信号。范围压缩信号的特征在于大于第一参考信号并且小于第二参考信号的幅度。此外，当模拟输入信号被采样N次并且范围压缩信号被采样N1次时，获得至少部分地与比率N1 /（N + N1）相关的压缩因子。

56. 发明授权

US07348907B2 Range compression in oversampling analog-to-digital converters 有权
标题翻译：过采样模数转换器中的范围压缩
公开(公告)号：US07348907B2
公开(公告)日：2008-03-25
申请号：US11483420
申请日：2006-07-07
申请人： Florin A. Oprescu
发明人： Florin A. Oprescu
IPC分类号： H03M1/00
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 that is based at least in part on N1/(N+N1) is obtained.
摘要翻译：提供了根据本发明的模拟 - 数字转换器。模数转换器优选地包括模拟输入信号，第一参考信号，第二参考信号和范围压缩信号。范围压缩信号的特征在于大于第一参考信号并且小于第二参考信号的幅度。此外，当模拟输入信号被采样N次并且范围压缩信号被采样N1次时，获得至少部分地基于N1 /（N + N1）的压缩因子。

57. 发明授权

US07268715B2 Gain control in a signal path with sigma-delta analog-to-digital conversion 有权
标题翻译：在Σ-Δ模数转换的信号路径中增益控制
公开(公告)号：US07268715B2
公开(公告)日：2007-09-11
申请号：US10977010
申请日：2004-10-29
申请人： Homero L. Guimaraes
发明人： Homero L. Guimaraes
IPC分类号： H03M3/00 , H03M1/12
CPC分类号： H03M3/48 , H03M3/49
摘要： Automatic gain control is provided in a sigma-delta analog-to-digital converter. The automatic gain control is entirely or partly provided by an amplifier and an attenuator within the sigma-delta analog-to-digital converter. The amplifier within the sigma-delta time continuous loop prior to quantization and an attenuator in the feedback prior to summation with incoming signals. Scaling within the sigma-delta analog-to-digital converter results in lower current requirements for automatic gain control without disturbing or minimizing disturbance of the stability of a sigma-delta topology. By providing at least part of the automatic gain within the analog-to-digital converter, the specifications or requirements of the LNA or baseband amplifiers may be reduced or limited.
摘要翻译：在Σ-Δ模数转换器中提供自动增益控制。自动增益控制完全或部分由Σ-Δ模数转换器内的放大器和衰减器提供。量化之前的Σ-Δ时间连续环路内的放大器和与输入信号求和之前的反馈中的衰减器。在Σ-Δ模数转换器内进行缩放，导致自动增益控制的电流要求较低，而不会干扰或最小化Σ-Δ拓扑稳定性的干扰。通过在模数转换器内提供至少一部分自动增益，可以减少或限制LNA或基带放大器的规格或要求。

58. 发明申请

US20060097899A1 ADAPTIVE-TYPE SIGMA-DELTA A/D CONVERTER 失效
标题翻译：自适应型SIGMA-DELTA A / D转换器
公开(公告)号：US20060097899A1
公开(公告)日：2006-05-11
申请号：US11049955
申请日：2005-02-04
申请人： Toshiaki Nagai
发明人： Toshiaki Nagai
IPC分类号： H03M3/00
CPC分类号： H03M3/48 , H03M3/49
摘要： A sigma-delta A/D converter includes an A/D converter configured to output a digital signal, a signal-magnitude detecting circuit coupled to the output of the A/D converter to output a control signal responsive to a magnitude indicated by the digital signal, a D/A converter coupled to the output of the A/D converter and the output of the signal-magnitude detecting circuit to output an analog signal having a signal level responsive to the digital signal and the control signal, a differential circuit coupled to an external analog input and the output of the D/A converter to output a differential between the external analog input and the analog signal, and a filter circuit to couple between the output of the differential circuit and an input of the A/D converter, wherein the D/A converter is configured to control, in response to the control signal, a capacitance of a capacitor that discharges following charging of electric charge to supply an electric current of the analog signal.
摘要翻译： Σ-ΔA/ D转换器包括被配置为输出数字信号的A / D转换器，耦合到A / D转换器的输出端的信号幅度检测电路，以响应于由数字信号信号，耦合到A / D转换器的输出的D / A转换器和信号幅度检测电路的输出，以输出响应于数字信号和控制信号的具有信号电平的模拟信号，差分电路耦合外部模拟输入和D / A转换器的输出端输出外部模拟输入和模拟信号之间的差分，以及滤波电路，用于耦合差分电路的输出和A / D转换器的输入，其中所述D / A转换器被配置为响应于所述控制信号来控制放电后续充电电荷以提供所述模拟信号的电流的电容器的电容。

59. 发明申请

US20060092059A1 Gain control in a signal path with sigma-delta analog-to-digital conversion 有权
标题翻译：在Σ-Δ模数转换的信号路径中增益控制
公开(公告)号：US20060092059A1
公开(公告)日：2006-05-04
申请号：US10977010
申请日：2004-10-29
申请人： Homero Guimaraes
发明人： Homero Guimaraes
IPC分类号： H03M3/00
CPC分类号： H03M3/48 , H03M3/49
摘要： Automatic gain control is provided in a sigma-delta analog-to-digital converter. The automatic gain control is entirely or partly provided by an amplifier and an attenuator within the sigma-delta analog-to-digital converter. The amplifier within the sigma-delta time continuous loop prior to quantization and an attenuator in the feedback prior to summation with incoming signals. Scaling within the sigma-delta analog-to-digital converter results in lower current requirements for automatic gain control without disturbing or minimizing disturbance of the stability of a sigma-delta topology. By providing at least part of the automatic gain within the analog-to-digital converter, the specifications or requirements of the LNA or baseband amplifiers may be reduced or limited.
摘要翻译：在Σ-Δ模数转换器中提供自动增益控制。自动增益控制完全或部分由Σ-Δ模数转换器内的放大器和衰减器提供。量化之前的Σ-Δ时间连续环路内的放大器和与输入信号求和之前的反馈中的衰减器。在Σ-Δ模数转换器内进行缩放，导致自动增益控制的电流要求较低，而不会干扰或最小化Σ-Δ拓扑稳定性的干扰。通过在模数转换器内提供至少一部分自动增益，可以减少或限制LNA或基带放大器的规格或要求。

60. 发明申请

US20050179487A1 Switching power amplifier using a frequency translating delta sigma modulator 失效
标题翻译：开关功率放大器使用频率变换ΔΣ调制器
公开(公告)号：US20050179487A1
公开(公告)日：2005-08-18
申请号：US10780188
申请日：2004-02-17
申请人： Wai Lee , Shawn Stapleton , Kelly Mekechuk
发明人： Wai Lee , Shawn Stapleton , Kelly Mekechuk
IPC分类号： H03F3/217 , H03F3/38 , H03M3/00
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.
摘要翻译：射频（RF）开关功率放大器包括：开关放大器203，用于在RF频带内提供放大的信号; 和可操作的Δ信号调制器（DSM）207; 以在反馈配置中控制开关放大器，以处理中频（IF）频带内的输入信号，其中输入信号对应于基带信号和放大信号，并且在RF频带内提供输出信号以驱动开关放大器。某些实施例允许或补偿浮动或可变IF频带和多个RF频带。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式