专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US06570394B1 Tests for non-linear distortion using digital signal processing 有权
标题翻译：使用数字信号处理测试非线性失真
公开(公告)号：US06570394B1
公开(公告)日：2003-05-27
申请号：US09761398
申请日：2001-01-16
申请人： Thomas H. Williams
发明人： Thomas H. Williams
IPC分类号： G01R2320
CPC分类号： H04N17/00 , H04B3/46
摘要： A system for determining a composite signal level at which a signal path begins to generate non-linear distortion. A reference test signal, which is preferably a short-duration burst of repeatable broadband energy, is passed through the signal path and received on a digital signal acquisition unit. An impaired received reference test signal is comprised of the transmitted reference test signal, linear distortion components, and non-linear distortion components. The impaired received reference test signal is digitally processed to reveal the non-linear distortion components. The impaired received reference test signal may be processed with a stored reference test signal to find a time-domain impulse response from which the uncorrelated distortion energy can be measured. Alternately, a reference test signal, such as an orthogonal frequency division multiplex (OFDM) reference signal with spectral holes, can be processed in the frequency domain to find the non-linear distortion energy that enters the spectral holes. Alternately, a transfer function of a signal path, showing an output voltage as a function of an input voltage, can be generated from a two-burst waveform comprised of a clipping high-level sinewave and non-clipping low-level sinewave. As the reference test signals are elevated in level, the magnitude of the non-linear distortion products can typically be observed to increase.
摘要翻译：用于确定信号路径开始产生非线性失真的复合信号电平的系统。优选地，可重复的宽带能量的短持续时间突发的参考测试信号通过信号路径并被接收在数字信号采集单元上。受损的接收到的参考测试信号由传输的参考测试信号，线性失真分量和非线性失真分量组成。受损的接收到的参考测试信号被数字处理以显示非线性失真分量。受损的接收到的参考测试信号可以用存储的参考测试信号进行处理，以找到可以测量不相关的失真能量的时域脉冲响应。或者，可以在频域中处理诸如具有频谱空穴的正交频分复用（OFDM）参考信号的参考测试信号，以找到进入频谱孔的非线性失真能量。或者，可以从包括限幅高电平正弦波和非限幅低电平正弦波的双脉冲串波形产生示出作为输入电压的函数的输出电压的信号路径的传递函数。随着参考测试信号的电平升高，通常可以观察到非线性失真产物的幅度增加。

2. 发明授权

US06717392B2 Signal generator 有权
标题翻译：信号发生器
公开(公告)号：US06717392B2
公开(公告)日：2004-04-06
申请号：US09870106
申请日：2001-05-30
申请人： Richard David Pearson
发明人： Richard David Pearson
IPC分类号： G01R2320
CPC分类号： H03F3/217 , G01R29/085 , G01R31/2841
摘要： A signal generator controls power output on the basis of the output from a &Dgr;-&Sgr; modulator or oscillator. That output may be generated in real time by the modulator or oscillator and fed to a switch control logic unit which controls a power switching stage to output switchably switched power from a power supply to an output, preferably via a filter. Alternatively the output of a &Dgr;-&Sgr; oscillator or modulator may be stored in a switchable memory to be retrieved when needed. A further alternative is to control the power switching stage by a processor with a program which reproduces the control effect of the &Dgr;-&Sgr; oscillator/modulator Feedback from the output may be used to control the &Dgr;-&Sgr; modulator/oscillator and/or the power supply.
摘要翻译：信号发生器根据Delta-Sigma调制器或振荡器的输出控制功率输出。该输出可以由调制器或振荡器实时生成并馈送到开关控制逻辑单元，开关控制逻辑单元控制功率开关级以优选地通过滤波器从电源向输出端输出可切换切换的功率。或者，Delta-Sigma振荡器或调制器的输出可以存储在可切换存储器中，以在需要时被检索。另一个选择是通过具有再现Delta-Sigma振荡器/调制器的控制效果的程序的处理器来控制功率切换级，来自输出的反馈可以用于控制Δ-Σ调制器/振荡器和/或功率供应。

3. 发明授权

US06646449B2 Intermodulation detector for a radio receiver 有权
公开(公告)号：US06646449B2
公开(公告)日：2003-11-11
申请号：US10034643
申请日：2001-12-28
申请人： Pauli Seppinen , Aarno Pärssinen , Mikael Gustafsson
发明人： Pauli Seppinen , Aarno Pärssinen , Mikael Gustafsson
IPC分类号： G01R2320
CPC分类号： H04B1/1027 , H04B1/109
摘要： An intermodulation detector (11) that operates standalone or in parallel with a radio receiver (10) of a radio receiver system (100) including a receiver tuning logic module (12), and, in the case of operating standalone, provides signals conveying information about intermodulation power in the receiver frequency band, and in case of operating in parallel with a radio receiver (10), provides to the receiver tuning logic module signals conveying information about power aliasing into the frequency band to which the radio receiver is tuned.

4. 发明授权

US06621277B2 Phase noise measurement module and method for a spectrum analyzer 失效
标题翻译：频谱分析仪的相位噪声测量模块和方法
公开(公告)号：US06621277B2
公开(公告)日：2003-09-16
申请号：US10021600
申请日：2001-10-30
申请人： Wing Jong Mar
发明人： Wing Jong Mar
IPC分类号： G01R2320
CPC分类号： G01R23/20 , G01R29/26
摘要： A phase noise measurement module (PNMM), system and method for measuring phase noise improve accuracy of phase noise measurements of a signal under test (SUT) using a spectrum analyzer. The PNMM includes an RF to hF frequency converter and a selectable frequency divider. The system includes the PNMM connected to the spectrum analyzer and employs an LO signal from a tunable LO in the spectrum analyzer. The method includes directly converting an input SUT to an IF signal having either a second or a third IF frequency that is applied to a corresponding frequency conversion stage of the spectrum analyzer before the phase noise is measured. The present invention bypasses a first conversion stage, and typically a second conversion stage as well, of the spectrum analyzer and directly converts the SUT to either the second or third IF frequency, thereby reducing phase noise added to the SUT.
摘要翻译：相位噪声测量模块（PNMM），用于测量相位噪声的系统和方法提高了使用频谱分析仪的被测信号（SUT）的相位噪声测量精度。 PNMM包括RF至hF变频器和可选择的分频器。该系统包括连接到频谱分析仪的PNMM，并在频谱分析仪中采用来自可调谐LO的LO信号。该方法包括在测量相位噪声之前将输入SUT直接转换为具有施加到频谱分析仪的相应频率转换级的第二或第三IF频率的IF信号。本发明绕过频谱分析仪的第一转换级，通常是第二转换级，并将SUT直接转换为第二或第三IF频率，从而减少加到SUT上的相位噪声。

5. 发明授权

US06545487B1 System and method for producing an amplified signal with reduced distortion 有权
标题翻译：用于产生具有减小的失真的放大信号的系统和方法
公开(公告)号：US06545487B1
公开(公告)日：2003-04-08
申请号：US09645120
申请日：2000-08-24
申请人： Trung Ly
发明人： Trung Ly
IPC分类号： G01R2320
CPC分类号： H03F1/3229 , H03F2201/3212
摘要： A distortion reduction system uses upstream signal information from carrier frequencies in a signal to be amplified, to determine at least one frequency for the distortion generated by an amplifier amplifying the signal. A sample of an output is taken, and a distortion detection circuitry is used to detect the amplitude of the distortion at least at the one frequency. In response to the amplitude of the distortion at the one frequency, the processing circuitry provides gain and/or phase control signal(s) to adjust the relative phase and/or gain between combining distortion products to reduce the amplitude of the distortion.
摘要翻译：失真减小系统使用要放大的信号中的载波频率的上行信号信息，以确定放大该信号的放大器产生的失真的至少一个频率。采取输出的采样，并且使用失真检测电路来至少在一个频率处检测失真的幅度。响应于一个频率处的失真的幅度，处理电路提供增益和/或相位控制信号，以调整组合失真产物之间的相对相位和/或增益，以减小失真的幅度。

6. 发明授权

US06469519B1 Precision loop voltage detector for subscriber line interface circuit applications 失效
标题翻译：用于用户线路接口电路应用的精密环路电压检测器
公开(公告)号：US06469519B1
公开(公告)日：2002-10-22
申请号：US09686324
申请日：2000-10-11
申请人： Leonel Ernesto Enriquez
发明人： Leonel Ernesto Enriquez
IPC分类号： G01R2320
CPC分类号： H04M3/2272 , G01R19/0084
摘要： A precision loop voltage measurement circuit outputs a voltage proportional to the differential voltage across a telephone wireline pair. This voltage is coupled to a tip-ring sense rectifier circuit having complementary transistor pairs coupled through a sense resistor to a node, which provides a current as of a composite of the tip-ring voltage and transistor voltage drops within the tip-ring sense rectifier circuit. A differential current extraction circuit generates a first current proportional to the sum of the tip-ring voltage plus voltage drops in the tip-ring sense rectifier circuit, and a second current fractionally proportional to only the internal voltage drops in the tip-ring sense rectifier circuit. The scaled currents are combined in an output resistor to produce a single ended output proportional to tip-ring voltage.
摘要翻译：精密回路电压测量电路输出与电话线对对上的差分电压成比例的电压。该电压耦合到具有通过检测电阻器耦合到节点的互补晶体管对的尖端环感测整流器电路，该节点提供尖端环路电压和尖端环路感测整流器内的晶体管电压降的复合电流电路。差分电流提取电路产生与尖端环感测整流电路中的尖端环电压加电压降之和成比例的第一电流，以及与仅尖端感测整流器中的内部电压降分数成正比的第二电流电路。缩放电流在输出电阻器中组合以产生与尖端环电压成比例的单端输出。

7. 发明授权

US06229315B1 Hand-held harmonics detector 失效
标题翻译：手持式谐波检测器
公开(公告)号：US06229315B1
公开(公告)日：2001-05-08
申请号：US08450849
申请日：1995-05-25
申请人： Stephen J. Briggs
发明人： Stephen J. Briggs
IPC分类号： G01R2320
CPC分类号： G01R23/16 , G01R1/22
摘要： A device for detecting harmonics in a current carrying conductor, comprises current probe for placing adjacent a current carrying conductor, the current probe generating an output signal in response to the current in the conductor; a circuit operably connected to the current probe for processing the output signal from the current probe; the circuit including a switching portion responsive to the output of the current probe for automatically turning on or off the circuit when the current probe senses current in the electrical conductor; and a display for the output of the circuit for indicating the presence of harmonics in the conductor. The display includes a plurality of various colored LEDs that are lit depending on the severity of the harmonics of interest that are detected. The circuit also includes a microcontroller for computing the Fourier coefficients of the harmonics of interest and an automatic gain control feature for auto-ranging for various current inputs from the current probe.
摘要翻译：一种用于检测载流导体中的谐波的装置，包括用于邻近载流导体放置的电流探针，所述电流探头响应于导体中的电流产生输出信号; 可操作地连接到电流探头的电路，用于处理来自电流探头的输出信号; 所述电路包括响应于所述电流探头的输出的开关部分，用于当所述电流探针感测所述电导体中的电流时，自动导通或关断所述电路; 以及用于指示导体中存在谐波的电路的输出的显示。显示器包括根据检测到的感兴趣的谐波的严重性点亮的多个各种彩色LED。该电路还包括用于计算感兴趣谐波的傅里叶系数的微控制器和用于从当前探针的各种电流输入进行自动测距的自动增益控制特征。

8. 发明授权

US06614241B2 Capacitive sensor for detecting surface condensation 失效
标题翻译：用于检测表面冷凝的电容式传感器
公开(公告)号：US06614241B2
公开(公告)日：2003-09-02
申请号：US09818779
申请日：2001-03-28
申请人： Hans-Michael Schmitt , Gottfried Berthold , Juergen Bach
发明人： Hans-Michael Schmitt , Gottfried Berthold , Juergen Bach
IPC分类号： G01R2320
CPC分类号： G01N27/226 , G01N27/223
摘要： A capacitive sensor for detecting surface condensation which includes a carrier (2), a metal layer (3) applied to the carrier (2) to form an interdigital structure, a passivation layer (6) formed over the metal layer (3), and a hydrophilic layer (7) applied over the passivation layer (6), where the hydrophilic layer (7) increases a surface tension of the passivation layer (7).
摘要翻译：一种用于检测表面冷凝的电容传感器，其包括载体（2），施加到载体（2）以形成叉指结构的金属层（3），形成在金属层（3）上的钝化层（6），以及施加在所述钝化层（6）上的亲水层（7），其中所述亲水层（7）增加所述钝化层（7）的表面张力。

9. 发明授权

US06566891B1 Measurement system and method of determining characteristics associated with a waveform having distortion associated therewith 失效
标题翻译：测量系统和确定与具有与其相关的失真的波形相关联的特性的方法
公开(公告)号：US06566891B1
公开(公告)日：2003-05-20
申请号：US09684259
申请日：2000-10-06
申请人： Akshay Aggarwal , Kadaba R. Lakshmikumar
发明人： Akshay Aggarwal , Kadaba R. Lakshmikumar
IPC分类号： G01R2320
CPC分类号： H04L25/0288 , H03F1/3211 , H03F3/45183 , H03F2203/45466 , H03F2203/45471 , H03F2203/45638 , H03F2203/45702 , H04L25/0272
摘要： The present invention provides a measurement system and a method of determining characteristics associated with a waveform that compensate for distortion associated therewith. In one embodiment, the measurement system includes a monitoring device that detects distortion in a waveform propagating along the transmission medium. The measurement system further includes a computational subsystem that generates a precompensation signal and precompensation value as a function of the distortion in the waveform. The precompensation value substantially compensates for the distortion when inserted into the waveform as a function of the precompensation signal.
摘要翻译：本发明提供了一种测量系统和确定与补偿与其相关联的失真的波形相关联的特性的方法。在一个实施例中，测量系统包括监测沿着传输介质传播的波形中的失真的监测装置。测量系统还包括计算子系统，其产生作为波形失真的函数的预补偿信号和预补偿值。作为预补偿信号的函数，预补偿值基本上补偿插入波形时的失真。

10. 发明授权

US06559654B2 Method and system for automatic determination of inductance 有权
公开(公告)号：US06559654B2
公开(公告)日：2003-05-06
申请号：US09681404
申请日：2001-03-29
申请人： Eddy Ying Yin Ho , Craig William Moyer , Luis Jose Garces Rivera
发明人： Eddy Ying Yin Ho , Craig William Moyer , Luis Jose Garces Rivera
IPC分类号： G01R2320
CPC分类号： G01R27/2611
摘要： A method and system for determining an inductance value of an inductive element are presented. The method includes energizing the inductive element using an N-pulse AC to DC converter in electrical communication with the inductive element and an AC source. The method further includes determining at each of a plurality of periodic time intervals an inductive element voltage value, an inductive element current value, and an equivalent source phase angle. An Nth harmonic impedance squared value is then determined for the inductive element using the inductive element voltage and current values and the equivalent source phase angles. The inductive element inductance value is then calculated using the Nth harmonic impedance squared value and an AC source frequency value.

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