公开(公告)号：US09188617B2

公开(公告)日：2015-11-17

申请号：US13862986

申请日：2013-04-15

Applicant: National Instruments Corporation

Inventor： Daniel S. Wertz ,  Michael J. Seibel

IPC: G01R29/26 ,  G01R27/28 ,  G01R27/32 ,  G01R31/26 ,  G01R19/00 ,  G01R23/20

CPC classification number: G01R27/32 ,  G01R19/0053 ,  G01R23/20 ,  G01R29/26 ,  G01R31/2616 ,  G01R31/2626 ,  G01R31/2646

Abstract: Measurements, e.g. S-parameter measurements may be performed by obtaining a complex ratio of at least two signals, using a single signal-receiver while eliminating noise problems traditionally associated with single receiver systems. A Vector Signal Generator (VSG) may be used to generate the input stimulus (signal), making it possible to share the local oscillator (LO) signal of the VSG with a single vector receiver, such that the phase noise of the LO signal is common to both the VSG and the vector receiver. When the stimulus signal from the VSG is observed with the vector receiver, the LO phase noise is unobservable, resulting in a significant reduction of the phase noise in the measured signals in both the numerator and the denominator, which in turn leads to a significant reduction in the phase noise of the ratio while retaining the benefits of a simple, single receiver.

Abstract translation: 测量，例如 S参数测量可以通过使用单个信号接收器获得至少两个信号的复数比来执行，同时消除传统上与单个接收机系统相关联的噪声问题。 可以使用矢量信号发生器（VSG）来产生输入激励（信号），使得可以用单个矢量接收器共享VSG的本地振荡器（LO）信号，使得LO信号的相位噪声为 对VSG和矢量接收器都是共同的。 当使用矢量接收器观察来自VSG的激励信号时，LO相位噪声是不可观测的，导致在分子和分母中的测量信号中的相位噪声显着降低，这又导致显着的减小 在比例的相位噪声中，同时保持简单，单一接收机的优点。

公开(公告)号：US09459295B2

公开(公告)日：2016-10-04

申请号：US13938495

申请日：2013-07-10

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： Daniel S. Wertz

IPC: H03B28/00 ,  G01R23/16 ,  G01R27/28

CPC classification number: G01R23/16 ,  G01R27/28 ,  H03B28/00

Abstract: An improved receiver system may include an input to receive an input signal, and a signal generating circuit to generate a desired oscillator signal that is a single sideband radio frequency signal of time varying frequency. The receiver may also include a downconversion stage to generate an intermediate frequency (IF) signal based on the input signal and the desired oscillator signal. A signal processing block in the receiver may be used to produce an output signal based on the IF signal by frequency shifting the IF signal by an amount that compensates for the time varying frequency of the desired oscillator signal. The desired oscillator signal may be generated using a vector signal generator that receives a control value from the signal processing block, converts the control value to a pair of analog input signals, and generates the desired oscillator signal by quadrature modulating the pair of analog input signals.

Abstract translation: 改进的接收机系统可以包括用于接收输入信号的输入端和产生作为时变频率的单个边带射频信号的期望振荡器信号的信号发生电路。 接收机还可以包括下变频级，以根据输入信号和期望的振荡器信号产生中频（IF）信号。 接收机中的信号处理块可以用于通过对IF信号进行频移以补偿期望振荡器信号的时变频率的量，基于IF信号来产生输出信号。 可以使用从信号处理块接收控制值的矢量信号发生器来产生期望的振荡器信号，将控制值转换成一对模拟输入信号，并通过对该模拟输入信号对进行正交调制来产生期望的振荡器信号 。

公开(公告)号：US20140257735A1

公开(公告)日：2014-09-11

申请号：US14281030

申请日：2014-05-19

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： Tamir E. Moran ,  Jatinderjit S. Bains ,  Daniel S. Wertz

IPC: G01R35/00

CPC classification number: G01R35/005 ,  G01R19/2516

Abstract: A user obtains a set of modules, inserts them into slots of a chassis, and interconnects the modules to form a modular instrument. A signal path extends through the modules. To support calibration of the signal path, a first of the modules (or the chassis or a calibration module) includes a calibration signal generator. A computer directs the first module to apply the calibration signal from the generator to the signal path, and measures the power (or amplitude) of the output of the signal path. The computer reads a factory-measured value A of the calibration signal amplitude from a memory of the first module (or the chassis or the calibration module). The value A and the measured output power of the signal path are used to determine a gain of the signal path. The system compensates for that gain when the signal path is used to measure live operational signals.

Abstract translation: 用户获取一组模块，将其插入到机箱的插槽中，并将模块互连以形成模块化仪器。 信号路径延伸穿过模块。 为了支持信号路径的校准，第一个模块（或机箱或校准模块）包括校准信号发生器。 计算机引导第一模块将来自发生器的校准信号施加到信号路径，并且测量信号路径的输出的功率（或幅度）。 计算机从第一个模块（或机箱或校准模块）的存储器读取校准信号振幅的出厂测量值A. 使用值A和信号路径的测量输出功率来确定信号路径的增益。 当信号路径用于测量实时操作信号时，系统补偿该增益。

公开(公告)号：US20150015238A1

公开(公告)日：2015-01-15

申请号：US13938495

申请日：2013-07-10

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： Daniel S. Wertz

IPC: G01R23/16 ,  H03B28/00

CPC classification number: G01R23/16 ,  G01R27/28 ,  H03B28/00

Abstract: An improved receiver system may include an input to receive an input signal, and a signal generating circuit to generate a desired oscillator signal that is a single sideband radio frequency signal of time varying frequency. The receiver may also include a downconversion stage to generate an intermediate frequency (IF) signal based on the input signal and the desired oscillator signal. A signal processing block in the receiver may be used to produce an output signal based on the IF signal by frequency shifting the IF signal by an amount that compensates for the time varying frequency of the desired oscillator signal. The desired oscillator signal may be generated using a vector signal generator that receives a control value from the signal processing block, converts the control value to a pair of analog input signals, and generates the desired oscillator signal by quadrature modulating the pair of analog input signals.

Abstract translation: 改进的接收机系统可以包括用于接收输入信号的输入端和产生作为时变频率的单个边带射频信号的期望振荡器信号的信号发生电路。 接收机还可以包括下变频级，以根据输入信号和期望的振荡器信号产生中频（IF）信号。 接收机中的信号处理块可以用于通过对IF信号进行频移以补偿期望振荡器信号的时变频率的量，基于IF信号来产生输出信号。 可以使用从信号处理块接收控制值的矢量信号发生器来产生期望的振荡器信号，将控制值转换成一对模拟输入信号，并通过对该模拟输入信号对进行正交调制来产生期望的振荡器信号 。

公开(公告)号：US20140306720A1

公开(公告)日：2014-10-16

申请号：US13862986

申请日：2013-04-15

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： Daniel S. Wertz ,  Michael J. Seibel

IPC: G01R27/02 ,  G01R29/26

CPC classification number: G01R27/32 ,  G01R19/0053 ,  G01R23/20 ,  G01R29/26 ,  G01R31/2616 ,  G01R31/2626 ,  G01R31/2646

Abstract: Measurements, e.g. S-parameter measurements may be performed by obtaining a complex ratio of at least two signals, using a single signal-receiver while eliminating noise problems traditionally associated with single receiver systems. A Vector Signal Generator (VSG) may be used to generate the input stimulus (signal), making it possible to share the local oscillator (LO) signal of the VSG with a single vector receiver, such that the phase noise of the LO signal is common to both the VSG and the vector receiver. When the stimulus signal from the VSG is observed with the vector receiver, the LO phase noise is unobservable, resulting in a significant reduction of the phase noise in the measured signals in both the numerator and the denominator, which in turn leads to a significant reduction in the phase noise of the ratio while retaining the benefits of a simple, single receiver.

Abstract translation: 测量，例如 S参数测量可以通过使用单个信号接收器获得至少两个信号的复数比来执行，同时消除传统上与单个接收机系统相关联的噪声问题。 可以使用矢量信号发生器（VSG）来产生输入激励（信号），使得可以用单个矢量接收器共享VSG的本地振荡器（LO）信号，使得LO信号的相位噪声为 对VSG和矢量接收器都是共同的。 当使用矢量接收器观察来自VSG的激励信号时，LO相位噪声是不可观测的，导致在分子和分母中的测量信号中的相位噪声显着降低，这又导致显着的减小 在比例的相位噪声中，同时保持简单，单一接收机的优点。