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公开(公告)号：US06885211B1
公开(公告)日：2005-04-26
申请号：US10117374
申请日：2002-04-05
CPC分类号： G01R31/2837
摘要： A method of testing an integrated circuit includes setting a guardbanded limit for a parameter associated with an embedded node, a deviation from the guardbanded limit under a set of test conditions correlated with a failure of the integrated circuit across a range of operating conditions. A test is performed under the test conditions to detect deviations of the parameter from the guardbanded limit to detect failures of the integrated circuit over the range of operating conditions.
摘要翻译： 一种测试集成电路的方法包括设置与嵌入式节点相关联的参数的保护限值，与在整个操作条件范围内的集成电路的故障相关的一组测试条件下的保护带限制的偏差。 在测试条件下进行测试，以检测参数与防护带限制的偏差，以检测集成电路在工作条件范围内的故障。
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公开(公告)号：US07639002B1
公开(公告)日：2009-12-29
申请号：US11410362
申请日：2006-04-25
IPC分类号： G01R31/28
CPC分类号： G01R31/31707
摘要： A method of testing an integrated circuit including a plurality of test nodes includes initiating a test mode and, during a first time interval of the test mode, stepping a level of a supply current of the integrated circuit to a calibration level. Parameters are observed at the plurality of test nodes to detect errors during a second time interval of the test mode and the level of the supply current selectively stepped in response to a number of errors detected. The level of the supply current is decoded to identify the detected errors.
摘要翻译： 一种测试包括多个测试节点的集成电路的方法包括启动测试模式，并且在测试模式的第一时间间隔期间，使集成电路的电源电平的级别达到校准水平。 在多个测试节点处观察参数以在测试模式的第二时间间隔期间检测错误，并且响应于检测到的错误的数量选择性地步进电源电平。 电源电流的电平被解码以识别检测到的错误。
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公开(公告)号：US06937046B1
公开(公告)日：2005-08-30
申请号：US10027187
申请日：2001-12-20
CPC分类号： G01R31/2884
摘要： A method of testing an integrated circuit including the steps of observing a selected parameter at a selected test mode to detect an error. The current to the integrated circuit is stepped from a reference level by selected amount.
摘要翻译： 一种测试集成电路的方法，包括在所选择的测试模式下观察所选择的参数以检测错误的步骤。 到集成电路的电流从参考电平以选定的量步进。
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4.发明授权High order multi-path operational amplifier with reduced input referred offset 有权高阶多径运算放大器，具有减少的输入参考偏移公开(公告)号：US06466091B1
公开(公告)日：2002-10-15
申请号：US09678160
申请日：2000-10-02
申请人： Murari Kejariwal , Prasad Ammisetti , Axel Thomsen
发明人： Murari Kejariwal , Prasad Ammisetti , Axel Thomsen
IPC分类号： H03F368
CPC分类号： H03F3/45982 , H03F1/30 , H03F3/343
摘要： Disclosed in this application is the placement of an additional integrator between the first stage integrator output and the input to the attenuator/low pass filter. This approach reduces the input referred offset by a factor equal to the gain of the additional integrator, and the offset of the additional integrator itself will be divided by the gain of the first-stage integrator.
摘要翻译： 在本申请中公开了在第一级积分器输出和衰减器/低通滤波器的输入之间放置附加积分器。 该方法将输入参考偏移减少了等于附加积分器的增益的因子，并且附加积分器本身的偏移将除以第一级积分器的增益。
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公开(公告)号：US06307430B1
公开(公告)日：2001-10-23
申请号：US09678166
申请日：2000-10-02
申请人： Axel Thomsen , Murari Kejariwal , Prasad Ammisetti
发明人： Axel Thomsen , Murari Kejariwal , Prasad Ammisetti
IPC分类号： H03F102
CPC分类号： H03F3/38 , H03F3/45192 , H03F3/4565 , H03F3/45739 , H03F3/45775 , H03F2203/45356 , H03F2203/45631 , H03F2203/45651 , H03F2203/45682
摘要： Disclosed is a chopper-stabilized amplifier with current steering used as output switching and to be operated in a low power supply voltage environment.
摘要翻译： 公开了一种具有电流转向的斩波稳定放大器，用作输出开关并在低电源电压环境中工作。
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6.发明授权公开(公告)号：US06515540B1
公开(公告)日：2003-02-04
申请号：US10013559
申请日：2001-12-10
IPC分类号： H03F102
摘要： An amplifier is disclosed including multiple integrator stages. The amplifier includes a low-frequency path from a signal input to a signal output and relatively higher-frequency bypass paths around the first integrator stage. The paths converge at a summing node. To prevent instability when the integrators are saturated by large signals, the circuit includes a saturation detector which disables the relatively low-frequency paths during such saturation conditions.
摘要翻译： 公开了包括多个积分器级的放大器。 放大器包括从信号输入到信号输出的低频路径和围绕第一积分器级的相对较高频率的旁路路径。 路径收敛在求和节点处。 为了防止当积分器被大信号饱和时的不稳定性，该电路包括饱和检测器，其在这种饱和状态期间禁用相对低频路径。
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公开(公告)号：US06617908B1
公开(公告)日：2003-09-09
申请号：US10104125
申请日：2002-03-22
IPC分类号： G06F764
CPC分类号： H03F3/005 , H03F2200/331
摘要： A switched capacitor circuit 300, including a sampling capacitor 303, switches 301, 304 for charging the sampling capacitor 303 during a charging phase, and switches 302, 305 for transferring charge from the sampling capacitor 303 to a load 313 in the feedback loop of an operational amplifier 312 during a dump phase. Circuitry 701 controls the discharge of sampling capacitor 303 during the dump phase to minimize transients at the input of the operational amplifier 312 and thereby minimize input threshold voltage variation.
摘要翻译： 包括采样电容器303的开关电容器电路300，用于在充电阶段期间对采样电容器303充电的开关301,304以及用于将电荷从采样电容器303传送到负载313的反馈回路中的开关302,305 运行放大器312。 电路701在放电阶段期间控制采样电容器303的放电，以使运算放大器312的输入处的瞬变最小化，从而最小化输入阈值电压变化。
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8.发明授权公开(公告)号：US06891430B1
公开(公告)日：2005-05-10
申请号：US09695706
申请日：2000-10-25
申请人： Axel Thomsen , Edwin De Angel , Sherry Wu , Lei Wang , Aryesh Amar
发明人： Axel Thomsen , Edwin De Angel , Sherry Wu , Lei Wang , Aryesh Amar
摘要： A signal processing integrated circuit has having a chopper stabilized, multistage, feedforward amplifier and a delta sigma analog to digital converter. Filtering of the output of the output from the analog to digital converter comprises a sinc5 filter and a sinc3 filter. The sinc3 filter may be bypassed. A rough buffer permits quick charging of a sample and hold capacitor during part of the charge cycle and slower but more accurate charging during the remainder of the charge cycle.
摘要翻译： 信号处理集成电路具有斩波稳定的多级前馈放大器和ΔΣ模数转换器。 从模数转换器输出的输出的滤波包括一个Sinc＆lt; 5＆gt;滤波器和一个sinc＆lt; 3＆gt; 3滤波器。 可以绕过sinc <3> 3滤波器。 一个粗略的缓冲器允许在充电周期的一部分期间快速充电一个采样和保持电容器，并且在充电周期的剩余时间内可以进行更慢但更精确的充电。
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9.发明授权Application of a conditionally stable instrumentation amplifier to industrial measurement 有权将有条件稳定的仪表放大器应用于工业测量公开(公告)号：US06525589B1
公开(公告)日：2003-02-25
申请号：US09695705
申请日：2000-10-25
申请人： Axel Thomsen , Edwin De Angel , Sherry Wu , Aryesh Amar , Jerome E. Johnston
发明人： Axel Thomsen , Edwin De Angel , Sherry Wu , Aryesh Amar , Jerome E. Johnston
IPC分类号： H03K1716
摘要： An instrumentation circuit has an integrated circuit that has input terminals, an amplifier arrangement using feed forward compensation and an analog to digital converter and a serial data output receiving the output from said amplifier arrangement. A bridge circuit, having a transducer, or a thermocouple arrangement are connected to input terminals of the integrated circuit.
摘要翻译： 仪表电路具有具有输入端子的集成电路，使用前馈补偿的放大器装置和模数转换器以及接收来自所述放大器装置的输出的串行数据输出。 具有换能器或热电偶布置的桥式电路连接到集成电路的输入端子。
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公开(公告)号：US08952751B2
公开(公告)日：2015-02-10
申请号：US13732135
申请日：2012-12-31
申请人： Axel Thomsen , Gang Yuan
发明人： Axel Thomsen , Gang Yuan
CPC分类号： H03F3/005 , H03F3/45197 , H03F3/45645 , H03F2203/45404 , H03F2203/45418 , H03F2203/45421 , H03F2203/45424 , H03F2203/45444 , H03F2203/45446 , H03F2203/45528 , H03F2203/45648
摘要： A method of operating an amplifier circuit having a pre-charge phase and a sample/conversion phase includes, during a pre-charge phase, charging first and second capacitors to first and second bias voltages. The first capacitor is coupled to a first input of an amplifier circuit, which has a second input and an output. The second capacitor is coupled to the second input. During a sample/conversion phase, the first input of the amplifier circuit is coupled to an input signal through the first capacitor to level-shift the input signal according to the first bias voltage and the output of the amplifier is coupled to the second input through the second capacitor to level shift a feedback signal according to the second bias voltage.
摘要翻译： 操作具有预充电阶段和采样/转换阶段的放大器电路的方法包括在预充电阶段期间将第一和第二电容器充电到第一和第二偏置电压。 第一电容器耦合到具有第二输入和输出的放大器电路的第一输入端。 第二电容器耦合到第二输入端。 在采样/转换阶段期间，放大器电路的第一输入通过第一电容耦合到输入信号，以根据第一偏置电压对输入信号进行电平移位，并且放大器的输出端通过 所述第二电容器根据所述第二偏置电压对反馈信号进行电平移位。
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