Sensor having an off-frequency drive scheme and a sense bias generator
utilizing tuned circuits
    11.
    发明授权
    Sensor having an off-frequency drive scheme and a sense bias generator utilizing tuned circuits 失效
    具有偏置驱动方案的传感器和利用调谐电路的感测偏压发生器

    公开(公告)号:US5703292A

    公开(公告)日:1997-12-30

    申请号:US425960

    申请日:1995-04-19

    申请人: Paul A. Ward

    发明人: Paul A. Ward

    IPC分类号: G01C19/56 G01P9/04 H03F1/08

    CPC分类号: H03F1/083 G01C19/5719

    摘要: Electronics for use in Coriolis and other sensors for reducing errors in the sensor output signal. The electronics includes an off-frequency drive scheme for reducing in-band drive signal coupling to the output signal and techniques for reducing errors in the sensor output signal due to quadrature and phase shift. The off-frequency drive scheme includes a frequency translation circuit in the excitation feedback loop of a sensor system to suppress components of the sensor drive signal at a predetermined frequency so that coupling of the drive signal to the sensor output signal can be readily removed by conventional filtering techniques. The sensor system includes a nonlinear input transducer for converting the drive signal to a force signal such that the force signal has a component at the predetermined frequency while the drive signal does not. A tuned circuit amplifies and filters the frequency shifted output signal of the translation circuit to provide the drive signal. Also provided is a sense bias generator including a tuned circuit for amplifying the available bias supply voltage to enhance sensitivity.

    摘要翻译: 用于科里奥利和其他传感器的电子装置,用于减少传感器输出信号的误差。 电子装置包括用于减少与输出信号耦合的带内驱动信号的非频率驱动方案和用于减少由于正交和相移导致的传感器输出信号中的误差的技术。 偏频驱动方案包括传感器系统的激励反馈回路中的频率转换电路,以预定频率抑制传感器驱动信号的分量,从而可以通过常规的方式将驱动信号与传感器输出信号的耦合容易地去除 过滤技术。 传感器系统包括非线性输入传感器,用于将驱动信号转换成力信号,使得力信号在驱动信号不具有预定频率的分量时。 调谐电路对转换电路的频移输出信号进行放大和滤波以提供驱动信号。 还提供了一种感测偏置发生器,其包括用于放大可用偏置电源电压以提高灵敏度的调谐电路。

    Apparatus for and method of sensing a measured input
    14.
    发明授权
    Apparatus for and method of sensing a measured input 有权
    用于感测测量输入的装置和方法

    公开(公告)号:US07055387B2

    公开(公告)日:2006-06-06

    申请号:US10898009

    申请日:2004-07-23

    IPC分类号: G01P15/00

    摘要: Apparatus is used in sensing a measured input. The apparatus includes a capacitor with a capacitance that varies non-linearly in response to the measured input, and a circuitry that derives, from the capacitance, a signal that varies substantially linearly with the measured input. The capacitor includes a first electrode, a second electrode, and a gap defined by a space between the electrode. The circuitry includes an amplifier with a first input terminal in electrical communication with the first electrode, a second input terminal, and an output terminal in electrical communication with the second electrode. The capacitance of the capacitor varies as an inverse of the gap of the capacitor, the gap of the capacitor varies in response to changes in the measured input, and the signal is derived from an output of the amplifier.

    摘要翻译: 仪器用于感测测量输入。 该装置包括具有响应于测量的输入而非线性变化的电容的电容器,以及从电容导出与测量输入基本上线性变化的信号的电路。 电容器包括第一电极,第二电极和由电极之间的空间限定的间隙。 电路包括具有与第一电极电连通的第一输入端的放大器,第二输入端和与第二电极电连通的输出端。 电容器的电容随电容器间隙的倒数而变化,电容器的间隙根据测量输入的变化而变化,信号从放大器的输出导出。

    RF balanced capacitive vibration sensor system
    15.
    发明授权
    RF balanced capacitive vibration sensor system 失效
    射频平衡电容式振动传感器系统

    公开(公告)号:US5808198A

    公开(公告)日:1998-09-15

    申请号:US858522

    申请日:1997-05-19

    IPC分类号: G01P15/125 G01P15/00

    CPC分类号: G01P15/125

    摘要: An RF balanced capacitive vibration sensor system includes a carrier generator for generating an r.f. carrier and an inverted r.f. carrier; a voltage tunable capacitive vibration sensor responsive to one of the carriers; a reference capacitor responsive to the other of the carriers; a summing device for combining the outputs from the sensor and reference capacitors; a controller device for adjusting the amplitude of the carriers to tune the capacitance of the sensor to that of the reference capacitor; the sensor modulating one of the carriers with a vibration modulation signal representative of a sensed vibration; an r.f. amplifier device responsive to the summing device for amplifying the modulated carrier from the sensor; and a detector device, responsive to the modulated carrier from the r.f. amplifier, for detecting the modulation signal representative of the sensed vibration.

    摘要翻译: RF平衡电容式振动传感器系统包括用于产生r.f的载波发生器。 载体和倒置r.f. 载体 响应于所述载体之一的电压可调电容式振动传感器; 响应于另一个载波的参考电容器; 用于组合来自传感器和参考电容器的输出的求和装置; 控制器装置,用于调整载波的振幅,以将传感器的电容调谐到参考电容器的电容; 所述传感器用表示感测到的振动的振动调制信号调制所述载波之一; 一个r.f. 所述放大器装置响应于所述求和装置,用于从所述传感器放大所述调制载波; 以及检测器装置,响应于来自r.f的调制载波。 放大器,用于检测表示感测振动的调制信号。

    Automatic resolution detection
    17.
    发明授权
    Automatic resolution detection 有权
    自动分辨率检测

    公开(公告)号:US06894706B1

    公开(公告)日:2005-05-17

    申请号:US09156816

    申请日:1998-09-18

    IPC分类号: G06F3/14 G09G3/20 G09G5/00

    摘要: A system provides automatic mode detection and scaler control in a display device which is digitally coupled to a display controller. The display controller has a variable active horizontal resolution and a variable active vertical resolution, while the display device has a fixed display device horizonal resolution and a fixed display device vertical resolution. The system determines the variable active horizontal and the vertical resolutions of the display controller; and scales the output of the display controller to the fixed horizontal resolution and vertical resolution of the display device.

    摘要翻译: 系统在数字耦合到显示控制器的显示设备中提供自动模式检测和缩放器控制。 显示控制器具有可变的主动水平分辨率和可变的主动垂直分辨率,而显示设备具有固定的显示设备水平分辨率和固定的显示设备垂直分辨率。 系统确定显示控制器的可变有效水平和垂直分辨率; 并将显示控制器的输出缩放到显示设备的固定水平分辨率和垂直分辨率。

    Low bandwidth display mode centering for flat panel display controller
    18.
    发明授权
    Low bandwidth display mode centering for flat panel display controller 失效
    用于平板显示控制器的低带宽显示模式居中

    公开(公告)号:US06295048B1

    公开(公告)日:2001-09-25

    申请号:US09156960

    申请日:1998-09-18

    IPC分类号: G09G534

    摘要: A system positions an image with a plurality of lines on a display device. The system determines the number of black lines required to vertically center the image in a frame of the display device as m+n; displays m black lines using a first horizontal sync period at the start of each frame, the first horizontal sync period being less than the horizontal sync period of the display device; displays each line of the image; and displays n black lines using the second horizontal sync period until the end of the frame.

    摘要翻译: 系统将具有多行的图像定位在显示装置上。 该系统确定将显示装置的帧中的图像垂直居中所需的黑线数量为m + n; 在每帧开始时使用第一水平同步周期显示m条黑线,第一水平同步周期小于显示装置的水平同步周期; 显示图像的每一行; 并使用第二水平同步周期显示n个黑线,直到帧的结束。