-
公开(公告)号：US4126826A
公开(公告)日：1978-11-21
申请号：US834860
申请日：1977-09-19
申请人： Robert C. Dobkin
发明人： Robert C. Dobkin
摘要： A transformer primary is first biased with a current sustained at least long enough for any secondary voltage to drop to zero. Then the primary is open circuited. The resultant secondary voltage is coupled to a constant voltage device such as a shunt regulator. A voltage related to the shunt regulator voltage will then appear in the open circuited primary and will be available for measurement fully isolated from the secondary. If the shunt regulator is made to operate as a function of a condition to be measured, an isolated remote measure of the condition is present at the primary of the transformer.
摘要翻译： 首先对变压器初级电压进行偏置，其电流至少持续足够长以使次级电压降至零。 然后主要是开路。 所得到的次级电压耦合到诸如分流调节器的恒定电压装置。 然后，与分流调节器电压相关的电压将出现在开路的初级电压中，并且将可用于与次级完全隔离的测量。 如果使分流调节器作为要测量的条件进行操作，则在变压器的主要部分存在条件的隔离远程测量。
-
公开(公告)号：US3978322A
公开(公告)日：1976-08-31
申请号：US510619
申请日：1974-09-30
申请人： Robert C. Dobkin
发明人： Robert C. Dobkin
CPC分类号： G04D7/1214
摘要： A system for measuring the accuracy of an internal timing source of a device having a light emitting display which is energized at a rate derived from the timing cycle of that timing source includes an optical pickup disposed for receiving light emission from one element of the display and generating a signal having the same frequency as the frequency of such light emission. In one embodiment, the pulses of that signal which occur within a given time period are counted and the number of such counted pulses is supplied to a display for human recognition. In a second embodiment, the time elapsed during one or more complete light emitting cycles is measured and displayed for human recognition. The pulses of a timing signal having a period of one microsecond which occur during one or more complete light emitting cycles are counted and the resultant count is displayed. A method includes the steps of comparing a time reference signal with a signal corresponding to the light emitting cycle of the light emitting display, determining the ratio of one parameter of the time reference signal to one parameter of the light emitting cycle, and displaying the value of either the ratio, a multiple of that ratio, or a submultiple of that ratio.
-
公开(公告)号：US08378657B2
公开(公告)日：2013-02-19
申请号：US12541557
申请日：2009-08-14
申请人： Robert C. Dobkin
发明人： Robert C. Dobkin
CPC分类号： G05F1/46 , H02J1/10 , Y10S323/907 , Y10T307/565
摘要： Circuits and methods for paralleling voltage regulators are provided. Improved current sharing and regulation characteristics are obtained by coupling control terminals of the voltage regulators together which results in precise output voltages and proportional current production. Distributing current generation among multiple paralleled voltage regulators improves heat dissipation and thereby reduces the likelihood that the current produced by the voltage regulators will be temperature limited.
-
公开(公告)号：US08085029B2
公开(公告)日：2011-12-27
申请号：US11731279
申请日：2007-03-30
申请人： Robert C. Dobkin
发明人： Robert C. Dobkin
CPC分类号： G05F3/30
摘要： Circuits and methods that improve the performance of reference circuits are provided. A reference generator circuit maintains a substantially constant output current over an extended temperature for use as a reference. Output current fluctuations caused by a poorly specified power source or process variations are minimized or eliminated.
摘要翻译： 提供了提高参考电路性能的电路和方法。 参考发生器电路在扩展温度下保持基本恒定的输出电流，以用作参考。 由指定的电源或工艺变化引起的输出电流波动被最小化或消除。
-
公开(公告)号：US07414473B1
公开(公告)日：2008-08-19
申请号：US11493654
申请日：2006-07-27
IPC分类号： H03F3/45
CPC分类号： H03F3/45192 , H03F1/483 , H03F3/3022 , H03F2200/36 , H03F2200/513 , H03F2203/30033 , H03F2203/45302 , H03F2203/45512
摘要： A class AB folded-cascode amplifier having improved gain-bandwidth product, comprises a differential input circuit including a differential transistor pair coupled to a source of tail current and responsive to a differential input signal for conducting a first current, a cascode circuit coupled to the differential input circuit for supplying a second current thereto, and a class AB output stage. A compensation circuit is configured for feeding back mutually complementary compensation signals from an output node to the differential input circuit.
摘要翻译： 具有改进的增益带宽乘积的AB类折叠共源共栅放大器包括差分输入电路，差分输入电路包括耦合到尾电流源的差分晶体管对，并响应用于传导第一电流的差分输入信号，耦合到 用于提供第二电流的差分输入电路和AB类输出级。 补偿电路被配置为将相互补偿的补偿信号从输出节点反馈到差分输入电路。
-
公开(公告)号：US07348767B2
公开(公告)日：2008-03-25
申请号：US11114267
申请日：2005-04-25
申请人： Thomas P Hack , Robert C Dobkin
发明人： Thomas P Hack , Robert C Dobkin
IPC分类号： G05F3/16
CPC分类号： H02M3/33584 , G05F1/70 , H02M3/1582 , Y10T307/707
摘要： Bidirectional power conversion systems provide the ability to change power attributes to and from a component. Current bidirectional power conversion systems use a unidirectional power converter for each direction. The integration of the two normally independent power converters results in a bidirectional power converter with nearly half the size, weight, volume, cost and complexity. Described are embodiments of bidirectional power conversion systems that allow power transfer between two or more components without requiring the use of separate unidirectional power converters.
-
公开(公告)号：US06518733B1
公开(公告)日：2003-02-11
申请号：US09921466
申请日：2001-08-03
IPC分类号： H02J700
CPC分类号： H05B41/30 , H02M3/33507
摘要： The present invention provides a capacitor charging circuit that efficiently charges capacitive loads. In particular, circuits and techniques are preferably provided for using current from both the primary and secondary windings of a transformer to control ON-time and OFF-time of a switch. This arrangement preferably yields an adaptable ON-time and adaptable OFF-time switch that is capable of rapidly charging capacitor loads ranging from as low as zero volts to several hundred volts. The output voltage is preferably measured indirectly to prevent unnecessary power consumption. In addition, control circuitry can be provided to conserve power by ceasing the delivery of power to the capacitor load once the desired output voltage is reached. Control circuitry preferably operates an interrogation timer that periodically activates the power delivery cycle to maintain the capacitor output load in a constant state of readiness.
-
公开(公告)号：US5945728A
公开(公告)日：1999-08-31
申请号：US807197
申请日：1997-02-27
申请人： Robert C. Dobkin , Robert L. Reay
发明人： Robert C. Dobkin , Robert L. Reay
IPC分类号： H01L23/50 , H01L21/822 , H01L23/495 , H01L23/64 , H01L25/00 , H01L27/04 , H05K1/16 , H05K3/20 , H01L23/28
CPC分类号： H01L23/49575 , H01L23/49589 , H01L23/642 , H01L2224/05554 , H01L2224/48091 , H01L2224/48247 , H01L2224/48465 , H01L2224/49171 , H01L24/48 , H01L24/49 , H01L2924/00014 , H01L2924/01014 , H01L2924/14 , H01L2924/19041 , H05K1/162 , H05K3/202 , Y10S257/904 , Y10T29/435
摘要： A capacitor is provided including first and second electrodes formed from portions of the lead frame structure used in conventional integrated circuit packaging. The electrodes are encapsulated with dielectric molding material which provides dielectric insulation between the electrodes. A low power capacitively-coupled digital isolator circuit is also provided. The circuit employs a pair of the lead frame capacitors of the present invention and includes differential driver and receiver circuits. The receiver can also include an optional filter for increasing noise and glitch immunity.
摘要翻译： 提供一种电容器，包括由常规集成电路封装中使用的引线框架结构的部分形成的第一和第二电极。 电极用介电模塑材料封装，其在电极之间提供介电绝缘。 还提供了一种低功率电容耦合数字隔离电路。 该电路采用本发明的一对引线框电容器，并包括差分驱动器和接收器电路。 接收机还可以包括可选的滤波器，以增加噪声和毛刺抗扰度。
-
公开(公告)号：US5148118A
公开(公告)日：1992-09-15
申请号：US673475
申请日：1991-03-22
申请人： Robert C. Dobkin , John W. Wright
发明人： Robert C. Dobkin , John W. Wright
CPC分类号： H03F3/45071 , H03F3/50
摘要： A new level shifting circuit is presented which does not restrict the upper limit of the common-mode input range of an operational amplifier. This is important particularly in operational amplifiers designated to operate with low power supply voltages. Significant parameters. of the operational amplifier, such as the gain and the slew rate, can be controlled without adversely affecting the common-mode input voltage range. The level shifting stage operates nondifferentially to avoid stability problems found in differential stages. A further improvement is accomplished using current balancing to achieve gain enhancement.
摘要翻译： 提出了一种不限制运算放大器的共模输入范围的上限的新的电平移位电路。 特别是在指定用低电源电压工作的运算放大器时，这一点非常重要。 重要参数 可以控制诸如增益和转换速率的运算放大器，而不会对共模输入电压范围产生不利影响。 电平转换阶段非周期地运行，以避免在差分阶段发现的稳定性问题。 使用电流平衡来实现进一步的改进以实现增益增强。
-
公开(公告)号：US4988952A
公开(公告)日：1991-01-29
申请号：US362144
申请日：1989-06-06
IPC分类号： H03H19/00
CPC分类号： H03H19/004
摘要： Disclosed is a switched capacitor filter block having a nonlinear quality coefficient, Q, whereby quality can be enhanced while limiting the size of feedback resistors in the filter block. A pair of capacitors alternately switchably connect an input signal to the input of integrator whereby the sampling frequency is twice the switching frequency. The filter block is readily fabricated in a monolithic integrated circuit with the feedback resistors being thin-film resistors formed on the surface of the monolithic integrated circuit. Such a circuit configuration is more accurate in programming and requires only one mask step in fabrication to program.
摘要翻译： 公开了具有非线性质量系数Q的开关电容滤波器块，由此可以在限制滤波器块中的反馈电阻器的尺寸的同时提高质量。 一对电容器交替地将输入信号连接到积分器的输入，由此采样频率是开关频率的两倍。 滤波器块容易地制造在单片集成电路中，反馈电阻器是形成在单片集成电路的表面上的薄膜电阻器。 这样的电路配置在编程中更准确，并且在制造中仅需要一个掩模步骤来编程。
-
-
-
-
-
-
-
-
-
搜索结果
73 条记录 (耗时 0.016 秒)
