Mixed signal acquisition system for a measurement instrument
    42.
    发明授权
    Mixed signal acquisition system for a measurement instrument 有权
    用于测量仪器的混合信号采集系统

    公开(公告)号:US08324885B2

    公开(公告)日:2012-12-04

    申请号:US12561908

    申请日:2009-09-17

    申请人: Kenneth P. Dobyns

    发明人: Kenneth P. Dobyns

    IPC分类号: G01R13/20

    CPC分类号: G01R31/3167

    摘要: A mixed signal acquisition system for a test and measurement instrument allows configuring of the number of analog and digital channels in use. The instrument includes an analog input interface and an N-channel logic input interface for receiving an analog signal and an N-channel logic signal, respectively. An A/D converter converts the analog input signal into an N-bit digital signal, and N latch circuits latch the N-bit logic signal. A multiplexer selects either the N-bit digital signal from the A/D converter, or the N-bit logic signals from the N latch circuits, and the selected signal at the output of the multiplexer is stored in an acquisition memory. By controlling the multiplexer selection, the number of analog channels and the digital channels can be controlled.

    摘要翻译: 用于测试和测量仪器的混合信号采集系统允许配置正在使用的模拟和数字通道的数量。 仪器包括模拟输入接口和N通道逻辑输入接口,用于分别接收模拟信号和N通道逻辑信号。 A / D转换器将模拟输入信号转换成N位数字信号,N个锁存电路锁存N位逻辑信号。 多路复用器选择来自A / D转换器的N位数字信号或来自N个锁存电路的N位逻辑信号,并且在多路复用器的输出处选择的信号被存储在采集存储器中。 通过控制复用器选择,可以控制模拟通道和数字通道的数量。

    Apparatus and method for improved measurement speed in test and measurement instruments
    43.
    发明授权
    Apparatus and method for improved measurement speed in test and measurement instruments 失效
    用于提高测试和测量仪器测量速度的装置和方法

    公开(公告)号:US08102396B2

    公开(公告)日:2012-01-24

    申请号:US11488310

    申请日:2006-07-17

    IPC分类号: G09G5/22

    CPC分类号: G01R13/0218

    摘要: An apparatus for measuring a parameter of a digitized signal including a digitizer to digitize an input signal into a digitized signal, a rasterizer to generate a raster image from the digitized input signal, a processor to receive the raster image, and a control interface to receive an input control signal indicating a request for a measurement. The rasterizer is responsive to the control signal to generate the raster image from the digitized input signal, and the processor is responsive to the control signal to generate a histogram from the raster image.

    摘要翻译: 一种用于测量数字化信号的参数的装置,包括数字转换器以将输入信号数字化为数字化信号,光栅化器从数字化输入信号生成光栅图像,处理器接收光栅图像,以及控制接口以接收 指示测量请求的输入控制信号。 光栅化器响应于控制信号从数字化的输入信号产生光栅图像,并且处理器响应于控制信号从光栅图像生成直方图。

    Self-adjusting hold-off trigger
    45.
    发明授权
    Self-adjusting hold-off trigger 失效
    自调节推杆触发器

    公开(公告)号:US07723976B2

    公开(公告)日:2010-05-25

    申请号:US11781202

    申请日:2007-07-20

    IPC分类号: G01R13/34 G01R13/14

    CPC分类号: G01R13/0254

    摘要: A self-adjusting hold-off trigger circuit and method detects a threshold crossing between consecutive samples of a digitized input signal as edge events, identifies the crossing as a qualified trigger event if the crossing is in a desired direction based upon trigger criteria, and provides a trigger output when the qualified trigger event occurs greater than an approximate average or peak time after a preceding edge event.

    摘要翻译: 自适应保持触发电路和方法检测作为边缘事件的数字化输入信号的连续采样之间的阈值交叉,如果根据触发标准在交叉点处于所需方向上,则将交叉识别为合格触发事件,并且提供 当限定触发事件发生时,触发输出大于前一个边沿事件之后的近似平均值或峰值时间。

    Host controlled voltage input system for an accessory device
    46.
    发明授权
    Host controlled voltage input system for an accessory device 有权
    用于附件设备的主机控制电压输入系统

    公开(公告)号:US07532492B2

    公开(公告)日:2009-05-12

    申请号:US11314357

    申请日:2005-12-20

    IPC分类号: H02M3/18 H02M7/00

    CPC分类号: G01R1/06788

    摘要: An accessory device voltage management system includes an accessory device selectively coupled to a host. The host provides a bulk power supply and a low power supply voltage to the accessory device. The host receives accessory device parameters from the device and determines if the accessory device is a valid and supported device and, if so, sends commands to the accessory device to couple the bulk power supply voltage to a power supply circuit in the accessory device. The power supply circuit in the accessory device generates at least a first regulated voltage output.

    摘要翻译: 辅助设备电压管理系统包括选择性地耦合到主机的附件设备。 主机向附件设备提供大容量电源和低电源电压。 主机从设备接收附件设备参数,并确定附件设备是否是有效和受支持的设备,如果是,则向配件设备发送命令以将大容量电源电压耦合到附件设备中的电源电路。 附件装置中的电源电路产生至少第一稳压电压输出。

    NOISE REDUCTION FILTER FOR TRIGGER CIRCUIT
    48.
    发明申请
    NOISE REDUCTION FILTER FOR TRIGGER CIRCUIT 有权
    用于触发电路的噪声减少滤波器

    公开(公告)号:US20080177508A1

    公开(公告)日:2008-07-24

    申请号:US11781432

    申请日:2007-07-23

    IPC分类号: H04B15/00

    CPC分类号: G01R13/0254

    摘要: A noise rejection filter for a trigger circuit uses an algorithm that updates the filter output monotonically so long as the signal slope remains unchanged, maintains the filter output at a constant level when the signal slope changes but the difference between the sample value and the filter output is less than or equal to a hysteresis value, and changes the signal slope while updating the filter output when the difference is greater than the hysteresis value. This maintains the peaks of the input signal at the filter output. The noise rejection filter may be used in a trigger circuit prior to a comparator so that the trigger signal from the comparator accurately reflects the signal pulse width at a desired trigger level and trigger events are detected when the desired trigger level is near the peaks of the input signal.

    摘要翻译: 用于触发电路的噪声抑制滤波器使用仅当信号斜率保持不变时单调更新滤波器输出的算法,当信号斜率改变时,将滤波器输出保持在恒定电平,而采样值与滤波器输出之间的差异 小于或等于滞后值,并且当差值大于滞后值时,更新滤波器输出时改变信号斜率。 这保持了滤波器输出处的输入信号的峰值。 噪声抑制滤波器可以在比较器之前的触发电路中使用,使得来自比较器的触发信号精确地将信号脉冲宽度反映到期望的触发电平,并且当期望的触发电平接近峰值时检测触发事件 输入信号。

    Method and apparatus for digitized waveform display
    49.
    发明申请
    Method and apparatus for digitized waveform display 有权
    用于数字化波形显示的方法和装置

    公开(公告)号:US20070273694A1

    公开(公告)日:2007-11-29

    申请号:US11442502

    申请日:2006-05-25

    IPC分类号: G06T11/20

    CPC分类号: G01R13/02

    摘要: An apparatus for displaying a digitized waveform includes an overview display configured to display a digitized waveform scrolling across the overview display, a zoom display configured to display a portion of the digitized waveform, and a control unit configured to cause the portion of the digitized waveform displayed in the zoom display to track the displayed portion of the digitized waveform in response to a track signal.

    摘要翻译: 用于显示数字化波形的装置包括:概略显示,被配置为显示横跨概览显示滚动的数字化波形;缩放显示器,被配置为显示所述数字化波形的一部分;以及控制单元,被配置为使所述数字化波形的所述部分显示 在变焦显示中,以响应于轨道信号跟踪数字化波形的显示部分。

    Multi-instrument triggering
    50.
    发明授权
    Multi-instrument triggering 失效
    多仪器触发

    公开(公告)号:US07152006B2

    公开(公告)日:2006-12-19

    申请号:US10987868

    申请日:2004-11-12

    申请人: Kenneth P. Dobyns

    发明人: Kenneth P. Dobyns

    IPC分类号: G06F3/01

    摘要: A multi-instrument triggering system includes in each instrument trigger system a system ready line for coupling an internal ready signal to an external port. A multi-instrument trigger bus cable connects the external ports, trigger event outputs and trigger event inputs of multiple instruments together in such a way as to enable the trigger generators in the instruments when all instruments are ready to receive a trigger event. When enabled, a coordinated trigger is generated in response to an internal trigger event from at one of the instruments. The coordinated trigger is coupled via the multi-instrument trigger bus cable as the trigger event to trigger all instruments in synchronism.

    摘要翻译: 多仪器触发系统在每个仪器触发系统中包括用于将内部就绪信号耦合到外部端口的系统就绪线路。 多仪器触发总线电缆将外部端口,触发事件输出和多个仪器的触发事件输入连接在一起,以便当所有仪器准备好接收触发事件时,使仪器中的触发发生器能够启用。 当启用时,会响应来自其中一个仪器的内部触发事件生成协调触发。 协调触发器通过多仪器触发总线电缆耦合作为触发事件,以同步触发所有仪器。