公开(公告)号：US10175334B2

公开(公告)日：2019-01-08

申请号：US14105999

申请日：2013-12-13

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： Christopher G. Regier ,  Pablo Limon

IPC: G01R35/00

Abstract: Systems and methods for calibration and operation of a source-measure unit (SMU). The system may include a functional unit and output terminals coupled to the functional unit. An excitation signal may be applied to a capacitor by the SMU. The capacitor may be included in a calibration circuit. The method may include obtaining one or more of a current calibration coefficient (CCC) or a voltage calibration coefficient (VCC). The CCC may correspond to a current-range setting and the VCC may correspond to a voltage-range setting. The CCC may be obtained from a value of a first current and a value of a second current developed in the capacitor responsive to the excitation signal. The VCC may be obtained from a value of a first voltage and a value of a second voltage developed across the capacitor responsive to the excitation signal.

公开(公告)号：US10436874B2

公开(公告)日：2019-10-08

申请号：US16242730

申请日：2019-01-08

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： Christopher G. Regier ,  Pablo Limon

IPC: G01R35/00

Abstract: Systems and methods for calibration and operation of a source-measure unit (SMU). The system may include a functional unit and output terminals coupled to the functional unit. An excitation signal may be applied to a capacitor by the SMU. The capacitor may be included in a calibration circuit. The method may include obtaining one or more of a current calibration coefficient (CCC) or a voltage calibration coefficient (VCC). The CCC may correspond to a current-range setting and the VCC may correspond to a voltage-range setting. The CCC may be obtained from a value of a first current and a value of a second current developed in the capacitor responsive to the excitation signal. The VCC may be obtained from a value of a first voltage and a value of a second voltage developed across the capacitor responsive to the excitation signal.

公开(公告)号：US09910074B2

公开(公告)日：2018-03-06

申请号：US14939775

申请日：2015-11-12

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： Blake A. Lindell ,  Christopher G. Regier ,  Pablo Limon

IPC: G01R31/00 ,  G01R19/00

CPC classification number: G01R19/0092 ,  G01R19/0053 ,  G01R31/00

Abstract: An improved measurement system may include a source measure unit (SMU) capable of performing accurate low-level current measurements. Based on an SMU design that provides a controlled DC voltage source with precision current limiting and a controlled 0V (zero Volt) DC at the measurement terminal, an AC design may be implemented to establish the same (or very similar) conditions over a specified frequency range. Instead of controlling each digital-to-analog converter (DAC) at respective source terminals of the SMU as a respective DC output, each DAC may be controlled as a respective function generator with programmable frequency and continuously variable phase and amplitude. Off-the-shelf pipelined analog-to-digital converters (ADCs) may be used to monitor voltage, current and the voltage at the measurement terminal, and a Fourier transform may be used to obtain both the amplitude and relative phase measurements to be provided to respective control loops.

公开(公告)号：US09651585B2

公开(公告)日：2017-05-16

申请号：US14133167

申请日：2013-12-18

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： John G. Banaska ,  Pablo Limon

IPC: H05K3/30 ,  G01R31/28 ,  G01R19/00 ,  H05K1/02 ,  G01R3/00

CPC classification number: G01R19/0092 ,  G01R3/00 ,  H05K1/0219 ,  H05K1/0268 ,  H05K2201/09618 ,  Y10T29/49147

Abstract: System and methods for use and fabrication of a printed circuit board (PCB). The PCB may include a node and a plurality of rows of vias that may be configured to establish a plurality of current pathways away from the node. The node may be a sensitive node and the plurality of current pathways may reduce leakage current at the node responsive to a signal applied to the node. Each row of the plurality of rows of vias may be offset with respect to adjacent rows of vias in a horizontal plane of the PCB. The PCB may have multiple layers and the node may be on an exterior surface layer or an interior layer. The vias may be mirco-vias, buried-vias, or through-vias.

公开(公告)号：US20150168529A1

公开(公告)日：2015-06-18

申请号：US14105999

申请日：2013-12-13

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： Christopher G. Regier ,  Pablo Limon

IPC: G01R35/00 ,  G01R31/28

CPC classification number: G01R35/005

Abstract: Systems and methods for calibration and operation of a source-measure unit (SMU). The system may include a functional unit and output terminals coupled to the functional unit. An excitation signal may be applied to a capacitor by the SMU. The capacitor may be included in a calibration circuit. The method may include obtaining one or more of a current calibration coefficient (CCC) or a voltage calibration coefficient (VCC). The CCC may correspond to a current-range setting and the VCC may correspond to a voltage-range setting. The CCC may be obtained from a value of a first current and a value of a second current developed in the capacitor responsive to the excitation signal. The VCC may be obtained from a value of a first voltage and a value of a second voltage developed across the capacitor responsive to the excitation signal.

Abstract translation: 源测量单元（SMU）的校准和操作的系统和方法。 该系统可以包括功能单元和耦合到功能单元的输出端子。 激励信号可以由SMU施加到电容器。 电容器可以包括在校准电路中。 该方法可以包括获得当前校准系数（CCC）或电压校准系数（VCC）中的一个或多个。 CCC可以对应于电流范围设置，并且VCC可以对应于电压范围设置。 CCC可以根据激励信号从第一电流的值和在电容器中产生的第二电流的值获得。 VCC可以根据激励信号从第一电压的值和跨电容器产生的第二电压的值获得。

公开(公告)号：US20190146050A1

公开(公告)日：2019-05-16

申请号：US16242730

申请日：2019-01-08

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： Christopher G. Regier ,  Pablo Limon

IPC: G01R35/00

CPC classification number: G01R35/005

Abstract: Systems and methods for calibration and operation of a source-measure unit (SMU). The system may include a functional unit and output terminals coupled to the functional unit. An excitation signal may be applied to a capacitor by the SMU. The capacitor may be included in a calibration circuit. The method may include obtaining one or more of a current calibration coefficient (CCC) or a voltage calibration coefficient (VCC). The CCC may correspond to a current-range setting and the VCC may correspond to a voltage-range setting. The CCC may be obtained from a value of a first current and a value of a second current developed in the capacitor responsive to the excitation signal. The VCC may be obtained from a value of a first voltage and a value of a second voltage developed across the capacitor responsive to the excitation signal.

公开(公告)号：US20170139001A1

公开(公告)日：2017-05-18

申请号：US14939775

申请日：2015-11-12

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： Blake A. Lindell ,  Christopher G. Regier ,  Pablo Limon

IPC: G01R31/28

CPC classification number: G01R19/0092 ,  G01R19/0053 ,  G01R31/00

Abstract: An improved measurement system may include a source measure unit (SMU) capable of performing accurate low-level current measurements. Based on an SMU design that provides a controlled DC voltage source with precision current limiting and a controlled 0V (zero Volt) DC at the measurement terminal, an AC design may be implemented to establish the same (or very similar) conditions over a specified frequency range. Instead of controlling each digital-to-analog converter (DAC) at respective source terminals of the SMU as a respective DC output, each DAC may be controlled as a respective function generator with programmable frequency and continuously variable phase and amplitude. Off-the-shelf pipelined analog-to-digital converters (ADCs) may be used to monitor voltage, current and the voltage at the measurement terminal, and a Fourier transform may be used to obtain both the amplitude and relative phase measurements to be provided to respective control loops.

公开(公告)号：US20150168463A1

公开(公告)日：2015-06-18

申请号：US14133167

申请日：2013-12-18

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： John G. Banaska ,  Pablo Limon

IPC: G01R19/00 ,  H05K1/11 ,  H05K3/30 ,  G01R31/28

CPC classification number: G01R19/0092 ,  G01R3/00 ,  H05K1/0219 ,  H05K1/0268 ,  H05K2201/09618 ,  Y10T29/49147

Abstract: System and methods for use and fabrication of a printed circuit board (PCB). The PCB may include a node and a plurality of rows of vias that may be configured to establish a plurality of current pathways away from the node. The node may be a sensitive node and the plurality of current pathways may reduce leakage current at the node responsive to a signal applied to the node. Each row of the plurality of rows of vias may be offset with respect to adjacent rows of vias in a horizontal plane of the PCB. The PCB may have multiple layers and the node may be on an exterior surface layer or an interior layer. The vias may be mirco-vias, buried-vias, or through-vias.

Abstract translation: 印刷电路板（PCB）的使用和制造的系统和方法。 PCB可以包括可以被配置为建立远离节点的多个电流路径的节点和多个通孔行。 节点可以是敏感节点，并且多个当前路径可以响应于施加到节点的信号来减少节点处的泄漏电流。 多行通孔中的每一行可以相对于PCB的水平平面中的相邻的通孔行而偏移。 PCB可以具有多个层，并且节点可以在外表面层或内层上。 通孔可以是通孔，通孔或通孔。