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    • 33. 发明授权
    • Peak-to-average measurement with envelope pre-detection
    • 峰值平均测量与包络预检测
    • US08072205B1
    • 2011-12-06
    • US12829243
    • 2010-07-01
    • Sukhjinder DeoBarrie GilbertJohn Cowles
    • Sukhjinder DeoBarrie GilbertJohn Cowles
    • G01D1/14
    • G01R19/02G01R19/003G06K9/00543
    • A peak-to-average measurement system includes an envelope detector to extract the modulation envelope of an input signal having a modulated carrier. The resulting baseband envelope signal is applied to a peak detector and an averaging circuit. In one embodiment, the averaging circuit includes a translinear core to generate a squared signal in response to the envelope signal and an RMS-average circuit to perform the averaging portion of an RMS function. The translinear core may also generate a replicated version of the envelope signal for the peak detector. The use of a common envelope detector for both the peak detector and averaging circuit may provide improved scaling accuracy.
    • 峰值平均测量系统包括一个包络检测器,用于提取具有调制载波的输入信号的调制包络。 得到的基带包络信号被施加到峰值检测器和平均电路。 在一个实施例中,平均电路包括用于响应于包络信号产生平方信号的跨线内核和用于执行RMS功能的平均化部分的RMS平均电路。 该跨线性核心还可以产生峰值检测器的包络信号的复制版本。 对峰值检测器和平均电路使用公共包络检测器可以提供改进的缩放精度。
    • 34. 发明申请
    • APPARATUS FOR MEASURING RF VOLTAGE FROM A QUADRUPOLE IN A MASS SPECTROMETER
    • 用于测量质谱仪中的四倍频的RF电压的装置
    • US20110084690A1
    • 2011-04-14
    • US12899672
    • 2010-10-07
    • John Vandermey
    • John Vandermey
    • G01R19/22
    • G01R19/003G01R19/0084G01R21/10G01R33/32G01R33/36H01J49/022
    • An apparatus for measuring RF voltage from a quadrupole in a mass spectrometer are provided. The apparatus comprises at least one rectifying diode circuit for rectifying the RF voltage of the quadrupole to produce a rectified RF voltage. The apparatus further comprises at least one operational amplifier configured as a current to voltage converter, a negative input of the at least one operational amplifier connected to the output of at least one diode in the at least one rectifying diode circuit, a positive input of the at least one operational amplifier at ground, and an output of the at least one operational amplifier in a feedback look with the negative input, to reduce reverse leakage current from the at least one diode.
    • 提供了用于在质谱仪中测量来自四极杆的RF电压的装置。 该装置包括至少一个整流二极管电路,用于整流四极的RF电压以产生整流的RF电压。 该装置还包括配置为电流 - 电压转换器的至少一个运算放大器,连接到至少一个整流二极管电路中的至少一个二极管的输出的至少一个运算放大器的负输入, 位于地的至少一个运算放大器,以及具有负输入的反馈外观中的至少一个运算放大器的输出,以减少来自至少一个二极管的反向泄漏电流。
    • 35. 发明授权
    • Current monitoring/control circuit
    • 电流监控/控制电路
    • US06914422B2
    • 2005-07-05
    • US10680707
    • 2003-10-07
    • Donald L. BaxterKenneth B. WheelerDavid C. Nguyen
    • Donald L. BaxterKenneth B. WheelerDavid C. Nguyen
    • G01R15/18G01R19/00G01R21/08
    • G01R15/183G01R19/003
    • A current control that employs a magnetic amplifier and an active feedback circuit. The feedback circuit establishes the effective operating current of the amplifier at a fixed point. The magnetic amplifier includes a pair of oppositely wound gate windings, a bias winding and a control winding. The gate windings are driven by an oscillator driver that generates a gate winding current and a gate winding voltage. A reference voltage and the gate winding voltage are applied to a feedback amplifier and the feedback circuit. When the gate winding voltage becomes equal to the reference voltage, the feedback circuit is stable and the gate winding current is set to a desired zero current operating point.
    • 采用磁放大器和有源反馈电路的电流控制。 反馈电路在固定点建立放大器的有效工作电流。 磁放大器包括一对相对卷绕的栅极绕组,偏置绕组和控制绕组。 栅极绕组由产生栅极绕组电流和栅极绕组电压的振荡器驱动器驱动。 参考电压和栅极绕组电压被施加到反馈放大器和反馈电路。 当栅极绕组电压变得等于参考电压时,反馈电路是稳定的,并且栅极绕组电流被设置到期望的零电流工作点。
    • 36. 发明申请
    • Current monitoring/control circuit
    • 电流监控/控制电路
    • US20050073294A1
    • 2005-04-07
    • US10680707
    • 2003-10-07
    • Donald BaxterKenneth WheelerDavid Nguyen
    • Donald BaxterKenneth WheelerDavid Nguyen
    • G01R15/18G01R19/00G01R33/00
    • G01R15/183G01R19/003
    • A current control circuit that employs a magnetic amplifier and an active feedback circuit. The feedback circuit establishes the effective operating current of the amplifier at a fixed point. The magnetic amplifier includes a pair of oppositely wound gate windings, a bias winding and a control winding. The gate windings are driven by an oscillator driver that generates a gate winding current and a gate winding voltage. A reference voltage and the gate winding voltage are applied to a feedback amplifier and the feedback circuit. When the gate winding voltage becomes equal to the reference voltage, the feedback circuit is stable and the gate winding current is set to a desired zero current operating point.
    • 一种采用磁放大器和有源反馈电路的电流控制电路。 反馈电路在固定点建立放大器的有效工作电流。 磁放大器包括一对相对卷绕的栅极绕组,偏置绕组和控制绕组。 栅极绕组由产生栅极绕组电流和栅极绕组电压的振荡器驱动器驱动。 参考电压和栅极绕组电压被施加到反馈放大器和反馈电路。 当栅极绕组电压变得等于参考电压时,反馈电路是稳定的,并且栅极绕组电流被设置到期望的零电流工作点。
    • 37. 发明授权
    • Method and device for offset-voltage free voltage measurement and adjustment of a reference voltage source of an integrated semiconductor circuit
    • 用于无偏压电压测量和调整集成半导体电路的参考电压源的方法和装置
    • US06812689B2
    • 2004-11-02
    • US09898816
    • 2001-07-03
    • Gunnar KrauseWolfgang Spirkl
    • Gunnar KrauseWolfgang Spirkl
    • G01R3100
    • G01R19/003
    • A method and device for measuring voltage of an internal reference voltage source of an integrated semiconductor circuit, in particular, a DRAM, including the steps of comparing a reference voltage to an external comparison voltage with a comparator, forming a measured value for the reference voltage to be set in accordance with a comparison result, switching a commutator by a clock- or software-control to alternatively apply the reference voltage and the comparison voltage to the comparator inputs at the same time, varying one of the reference and comparison voltage to a setpoint voltage value until the comparator output changes its logic value at each commutator switched stage, buffering the voltage values present for each switched state when the logic value changes, forming an average value for the reference voltage from the stored voltage values, and setting the reference voltage as a function of the average value formed.
    • 一种用于测量集成半导体电路,特别是DRAM的内部参考电压源的电压的方法和装置,包括将参考电压与外部比较电压与比较器进行比较的步骤,形成参考电压的测量值 根据比较结果设置,通过时钟或软件控制切换换向器以交替地将参考电压和比较电压同时施加到比较器输入,将参考电压和比较电压之一改变为 直到比较器输出在每个换向器切换级改变其逻辑值,缓冲当逻辑值改变时针对每个切换状态存在的电压值,从存储的电压值形成参考电压的平均值,并设置参考值 电压作为形成的平均值的函数。