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    • 2. 发明授权
    • Dielectric absorption compensation for a measurement instrument
    • 测量仪器的介电吸收补偿
    • US08903687B1
    • 2014-12-02
    • US11840600
    • 2007-08-17
    • John G. BanaskaGregory Roberts
    • John G. BanaskaGregory Roberts
    • G06G7/48G06F17/50
    • G06G7/48G01R29/24G01R35/005G06F17/5022G06F17/5036
    • A method for compensating for a dielectric absorption effect in a measurement configuration during measurements by an instrument having measurement terminals includes providing a feedback loop in the instrument, the loop having a gain adjustment and a simulation impedance and being adapted to provide a signal counter to the dielectric absorption at the measurement terminals; applying a transient calibration signal to the test terminals for at least two values of the gain adjustment; measuring a response to the calibration signal for each of the at least two values; and determining an operating value of the gain adjustment based on the measured responses. The operating value is used for subsequent measurements by the instrument, the simulation impedance modeling the dielectric absorption characteristics of the measurement configuration.
    • 在具有测量端子的仪器测量期间补偿测量结构中的介电吸收效应的方法包括在仪器中提供反馈回路,该回路具有增益调节和模拟阻抗,并且适于提供与 测量端子处的介电吸收; 对测试终端施加至少两个增益调整值的瞬态校准信号; 测量所述至少两个值中的每一个对所述校准信号的响应; 以及基于所测量的响应来确定所述增益调整的操作值。 工作值用于仪器的后续测量,模拟阻抗对测量结构的介电吸收特性进行建模。
    • 5. 发明授权
    • High capacitance load testing
    • 高电容负载测试
    • US07800380B1
    • 2010-09-21
    • US11844615
    • 2007-08-24
    • John G. BanaskaGregory Roberts
    • John G. BanaskaGregory Roberts
    • G01R27/08
    • G01R19/0092
    • A circuit for controlling a voltage across a device and permitting measurement of a current through the device includes a sense impedance in series combination with, the device, a sensed voltage measured across the sense impedance being representative of the current through the device; a capacitive stability element in parallel combination with the sense resistance, the capacitive stability element being virtually absent by connection to a virtual version of the sensed voltage when the device has a first capacitance and being present when the device has a second capacitance, the second capacitance being larger than the first capacitance.
    • 用于控制器件上的电压并允许测量通过器件的电流的电路包括与器件串联组合的感测阻抗,感测阻抗上测量的感测电压代表通过器件的电流; 电容稳定元件与感测电阻并联组合,当器件具有第一电容并且当器件具有第二电容时,电容稳定元件通过连接到感测电压的虚拟版本实际上不存在,第二电容 大于第一电容。
    • 9. 发明授权
    • Range changing using N and P channel FETS
    • 使用N和P沟道FETS的范围变化
    • US5144154A
    • 1992-09-01
    • US526291
    • 1990-05-21
    • John G. Banaska
    • John G. Banaska
    • G01R15/08G05F1/652H03K17/16
    • G01R15/08G05F1/652H03K17/163
    • A range selecting impedance is switched into or out of a parallel range-selecting network by connecting the impedance across the network through an n-channel and a p-channel FET connected in parallel output configuration. The n-channel FET does the switching if the drains are negative with respect to the sources. The p-channel FET does the switching if the drains are positive with respect to the sources. Each FET is controlled by a gate drive whose output waveform is varied to select the rate at which the FETs switch. In cases of several different switched range impedances, the FETs are used to switch the smallest impedance into the network, another range impedance is selected, and then the FETs used to switch the smallest impedance out of the network. In this way, fast glitch-free range switching is achieved.
    • 通过在并联输出配置中连接通过n沟道和p沟道FET在网络上连接阻抗,将范围选择阻抗切换到并行选择网络中。 如果漏极相对于源极为负,则n沟道FET进行切换。 如果漏极相对于源极为正,则p沟道FET进行切换。 每个FET由栅极驱动器控制,其输出波形变化以选择FET切换的速率。 在几种不同的开关范围阻抗的情况下,FET用于将最小的阻抗切换到网络中,选择另一个范围阻抗,然后用于将最小阻抗切换到网络外的FET。 以这种方式实现快速无毛刺范围切换。
    • 10. 发明授权
    • Control for voltage/current source with current/voltage limiting
    • 用电流/电压限制对电压/电流源进行控制
    • US5039934A
    • 1991-08-13
    • US527018
    • 1990-05-22
    • John G. Banaska
    • John G. Banaska
    • G05F1/571G05F1/573
    • G05F1/571G05F1/573
    • An apparatus capable of acting as a current-limited voltage source or a voltage-limited current source is disclosed. The output of the apparatus is provided by a differential amplifier. The current and voltage outputs are compared to positive and negative current and voltage limits. Depending on whether the apparatus is in the voltage mode or the current mode, the inverting input of the differential amplifier is clamped to the appropriate voltage or current comparison signal, respectively, to provide an error signal to the differential amplifier. This clamping is current limited so that if the output current limits are exceeded while in the voltage source mode, a clamp to one of the current comparison signals occurs and dominates the voltage clamp. Similarly, if the output voltage limits are exceeded while in the current source mode, a clamp to one of the voltage comparison signals occurs and dominates the current clamp. To enable a voltage or current source limit to be set at zero, the opposite polarity limit is offset slightly to avoid contention should it also be set near zero.
    • 公开了一种能够用作限流电压源或限压电流源的装置。 该装置的输出由差分放大器提供。 将电流和电压输出与正和负电流和电压限制进行比较。 根据设备是否处于电压模式或当前模式,差分放大器的反相输入分别被钳位到适当的电压或电流比较信号,以向差分放大器提供误差信号。 这种钳位电流受限制,因此如果在电压源模式下超过输出电流限制,就会产生钳位到当前比较信号中的一个并支配电压钳位。 类似地,如果在电流源模式下超过输出电压限制,就会产生钳位到一个电压比较信号并支配电流钳位。 为了使电压或电流源极限被设置为零,相反的极性极限将略微偏移,以避免竞争,如果也应设置为接近零。