公开(公告)号：US4767980A

公开(公告)日：1988-08-30

申请号：US111215

申请日：1987-10-22

申请人： William I. H. Chen ,  Philip Dillon ,  Glenn Yancey

发明人： William I. H. Chen ,  Philip Dillon ,  Glenn Yancey

IPC分类号： H01F27/42 ,  H04M7/00 ,  H04M19/00

CPC分类号： H01F27/42 ,  H04M19/005 ,  H04M7/0096

摘要： A circuit for increasing the apparent inductance presented by a transformer to a differential signal. The circuit may be used in a battery feed interface circuit for providing battery power to a subscriber's telephone or in a current sink interface circuit for providing a low impedance DC loop closure toward a telephone line feed circuit while maintaining a high impedance for differential AC signals. In either usage the inductance multiplier circuit always multiplies the primary inductance of the transformer by a factor which is one plus a positive number. The transformer has three windings. The multiplication is accomplished by a current source which provides to the third winding a current which flows therein in a manner so as to oppose the current flowing in that winding due to the voltage induced in that winding when the first and second windings are excited by the differential AC signal.

摘要翻译： 用于将变压器提供的视在电感增加到差分信号的电路。 该电路可用于电池馈电接口电路中，用于向用户的电话或当前的接收器接口电路提供电池电力，以向电话线馈电电路提供低阻抗DC环路闭合，同时保持差分AC信号的高阻抗。 在任何一种使用中，电感乘法器电路总是将变压器的初级电感乘以一加正数。 变压器有三个绕组。 乘法由电流源实现，该电流源以第一和第二绕组被第一绕组和第二绕组激励的方式向第三绕组提供电流，该电流以与该绕组中流动的电流相反的方式流动， 差分交流信号。

公开(公告)号：US6151226A

公开(公告)日：2000-11-21

申请号：US305637

申请日：1999-05-05

申请人： William I. H. Chen ,  Edwin Glenn Yancey ,  Mahlon Danny Kimbrough

发明人： William I. H. Chen ,  Edwin Glenn Yancey ,  Mahlon Danny Kimbrough

IPC分类号： H02M3/335 ,  H02M7/538

CPC分类号： H02M3/33584

摘要： A four quadrant power conversion topology comprising a multi-winding inductor, four switches, and four diodes is disclosed. The four quadrant power conversion is utilized in a number of power conversion devices such as a power efficient non-linear power amplifier that comprises the 4Q power conversion topology of the present invention and a switch-control-signal generator coupled to the 4Q power conversion topology. The switch-control-signal generator generates switch activation signals for driving the four switches of the 4Q power conversion topology. In one embodiment the switch-control-signal generator comprises a polarity detector for detecting the polarity of an input signal, a full wave rectifier for rectifying the input signal, a pulse width modulator which produces a pulse width modulated signal representative of the full wave rectified input signal, and steering logic that generates switch activation signals for driving the power conversion topology to produce an output representative of the input signal. The amplifier may optionally include switch drivers to condition the switch activation signals to drive the switches in the 4Q power conversion topology.

摘要翻译： 公开了一种包括多绕组电感器，四个开关和四个二极管的四象限功率转换拓扑。 四象限功率转换被用于许多功率转换装置，例如包括本发明的4Q功率转换拓扑的功率有效的非线性功率放大器，以及耦合到4Q功率转换拓扑的开关控制信号发生器 。 开关控制信号发生器产生用于驱动4Q功率转换拓扑的四个开关的开关激活信号。 在一个实施例中，开关控制信号发生器包括用于检测输入信号的极性的极性检测器，用于整流输入信号的全波整流器，产生表示全波整流的脉宽调制信号的脉宽调制器 输入信号和转向逻辑，其产生用于驱动功率转换拓扑以产生表示输入信号的输出的开关激活信号。 放大器可以可选地包括开关驱动器以调节开关激活信号以驱动4Q功率转换拓扑中的开关。

公开(公告)号：US06608900B1

公开(公告)日：2003-08-19

申请号：US09164495

申请日：1998-10-01

申请人： Edwin Glenn Yancey ,  Leroy S. Baker ,  William I. H. Chen

发明人： Edwin Glenn Yancey ,  Leroy S. Baker ,  William I. H. Chen

IPC分类号： H04M1900

CPC分类号： H04M19/001 ,  Y10T307/469 ,  Y10T307/484

摘要： A load management system for monitoring the output from a power supply and managing the load on said power supply, said load management system comprising a hysteresis circuit for signaling a load element to stop drawing current when an output voltage at said output falls below a first threshold and for signaling said load element to resume drawing current when said output voltage rises above a second threshold, said hysteresis circuit comprising a first state sensing circuit having an input coupled to said output and for signaling whether said output voltage is greater than or less than said first voltage threshold, a second state sensing circuit having an input coupled to said output and for signaling whether said output voltage is greater than or less than a second voltage threshold, and a state transition circuit having a first input coupled to the output of said first state sensing circuit and a second input coupled to the output of said second state sensing circuit, said state transition circuit having an output for setting a first control signal to a first state when said output voltage falls below said first threshold and resetting said first control signal to a second state when said output voltage rises above said second threshold.

摘要翻译： 一种用于监测来自电源的输出并管理所述电源上的负载的负载管理系统，所述负载管理系统包括滞后电路，用于在所述输出处的输出电压低于第一阈值时发信号通知负载元件停止牵引电流 并且当所述输出电压上升到高于第二阈值时，用于发信号通知所述负载元件恢复牵引电流，所述滞后电路包括第一状态感测电路，其具有耦合到所述输出的输入，以及用于发信号通知所述输出电压是大于还是小于所述输出电压 第一电压阈值，第二状态感测电路，其具有耦合到所述输出的输入，以及用于发信号通知所述输出电压是否大于或小于第二电压阈值;以及状态转移电路，具有耦合到所述第一电压阈值的输出的第一输入 状态感测电路和耦合到所述第二状态感测电路的输出的第二输入端 当所述输出电压低于所述第一阈值时，具有用于将第一控制信号设置为第一状态的输出，并且当所述输出电压升高到所述第二阈值以上时，将所述第一控制信号复位到第二状态。

公开(公告)号：US06169389A

公开(公告)日：2001-01-02

申请号：US09286055

申请日：1999-04-05

申请人： William I. H. Chen

发明人： William I. H. Chen

IPC分类号： H02J700

CPC分类号： H02M3/1582 ,  H02J7/345

摘要： An energy storage system is provided that includes input terminals for receiving input energy from a remote power source and an energy storage device coupled to the input terminals. The energy storage device is operative to store at least of portion of the input energy and to supply stored energy to the input terminals. A pump device is also coupled to the input terminal and to the storage device. The pump device is operative to cause the energy storage device to store at least a portion of the input energy when the input energy level is above a first threshold level, and to cause the energy storage device to supply energy to the input terminals when the input energy level is below a second threshold level. The energy storage system is optionally provided with a current limiter for added protection against short circuits. In one embodiment, the current limiter is bi-direction; it protects against short circuits originating at both the power source and within the energy storage system. Also, the energy storage system is optionally provided with a safety discharge circuit that discharges the energy storage system upon its removal from the energy storage system.

摘要翻译： 提供了一种能量存储系统，其包括用于从远程电源接收输入能量的输入端和耦合到输入端的能量存储装置。 能量存储装置可操作以存储输入能量的至少一部分并向输入端子提供储存的能量。 泵装置还耦合到输入端子和存储装置。 当输入能量水平高于第一阈值水平时，泵装置可操作以使能量存储装置存储至少一部分输入能量，并且当输入的能量存储装置向输入端供能时， 能量水平低于第二阈值水平。 能量存储系统可选地设置有限流器，用于增加防短路保护。 在一个实施例中，限流器是双向的; 它防止源自电源和能量存储系统中的短路。 此外，能量存储系统可选地设置有安全放电电路，其在从能量存储系统移除时将能量存储系统放电。

公开(公告)号：US5515433A

公开(公告)日：1996-05-07

申请号：US298146

申请日：1994-08-30

申请人： William I. H. Chen

发明人： William I. H. Chen

IPC分类号： H04M19/00 ,  H04M1/76

CPC分类号： H04M19/001

摘要： A line feed circuit employing a low-inductance transformer, and providing a major portion of the terminating impedance as line feed resistors connected between a telephone line and the transformer primary. A low impedance output amplifier drives a low resistance transformer secondary, thus reducing the need for large transformer inductances. By connecting the line feed resistors between the transformer and the telephone line, high voltage surges are absorbed by the resistors, and thus little is dissipated in the transformer. The transformer can be made physically small, because of the reduced inductance, reduced winding insulation, and reduced power requirements. The resistance forward type of line feed circuit lends itself well to simple implementation with flux cancellation and impedance synthesis circuits.

摘要翻译： 采用低电感变压器的线路馈电电路，并且将终端阻抗的主要部分提供为连接在电话线路和变压器初级线路之间的线路馈电电阻器。 低阻抗输出放大器驱动低电阻变压器次级，从而减少对大型变压器电感的需求。 通过连接变压器和电话线之间的馈线电阻，高压浪涌被电阻吸收，因此在变压器中几乎没有消散。 由于电感减小，绕组绝缘减少，功率要求降低，变压器可以做到物理上小。 线路馈电电路的电阻前馈类型很好地实现了具有磁通消除和阻抗合成电路的简单实现。

公开(公告)号：US06288883B1

公开(公告)日：2001-09-11

申请号：US09130734

申请日：1998-08-07

申请人： William I. H. Chen

发明人： William I. H. Chen

IPC分类号： H02H900

CPC分类号： H04M3/18

摘要： A power input protection circuit for an electrical device including a pass device having a full-conduction state, an off state, and a current regulation state, a control device coupled to the pass device for signaling the pass device to operate in one of the full-conduction, off or current regulation states, a high-voltage sensing circuit coupled to the control device for signaling the presence of an over-voltage condition to the control device, a high-current sensing circuit coupled to the control device for signaling the presence of an over-current condition to the control device, and an energy storage circuit coupled to the regulator and for supplying energy to the regulator when the pass device is in the off state is disclosed. In one embodiment the high-current sensing circuit comprises an input current sensor having a first input and a second input, a second voltage reference coupled to the first input, and a current measuring circuit coupled to the second input and the high-voltage sensing circuit comprises an input voltage sensor having a first input and a second input, a first voltage reference coupled to the first input, and an input voltage measuring circuit coupled to the second input. The pass device blocks the flow of current through the voltage regulator when the pass device is in the off state and limits the flow of current through the voltage regulator when the pass device is in the current regulation state.

摘要翻译： 一种用于电气设备的电力输入保护电路，包括具有全导通状态，断开状态和电流调节状态的通过装置的电气设备，耦合到通过装置的控制装置，用于发信号通过装置， 导通，关断或电流调节状态，耦合到控制装置的高电压感测电路，用于向控制装置发信号通知存在过电压状态;耦合到控制装置的高电流感测电路，用于发信号通知 公开了一种过电流状态到控制装置的能量存储电路，以及耦合到调节器的能量存储电路，并且用于在通过装置处于断开状态时向调节器供应能量。 在一个实施例中，高电流感测电路包括具有第一输入和第二输入的输入电流传感器，耦合到第一输入的第二参考电压以及耦合到第二输入端和高压感测电路的电流测量电路 包括具有第一输入和第二输入的输入电压传感器，耦合到第一输入的第一参考电压以及耦合到第二输入的输入电压测量电路。 当通过装置处于关闭状态时，通过装置阻止通过电压调节器的电流流动，并且当通过装置处于电流调节状态时限制通过电压调节器的电流流动。

公开(公告)号：US4518930A

公开(公告)日：1985-05-21

申请号：US403896

申请日：1982-07-30

申请人： John G. Rozema ,  William I. H. Chen

发明人： John G. Rozema ,  William I. H. Chen

IPC分类号： H03B5/04 ,  H03B5/36 ,  H03B7/06 ,  H03H11/52 ,  H03L7/00

CPC分类号： H03B5/366 ,  H03B7/06 ,  H03B2200/0008 ,  H03B5/04

摘要： A high-frequency negative resistance circuit for use in a voltage controlled crystal oscillator has a pair of input terminals thereby defining an input current and input voltage. The high-frequency negative resistance circuit includes a sensing circuit for sensing the input current, a biasing voltage source and a load impedance connected to the voltage source. The high-frequency negative resistance circuit further comprises a current mirror circuit connected to the sensing circuit and to the load impedance for producing a current in the load impedance. The current in the load impedance is approximately equal to the input current. The current mirror circuit also controls the sensing circuit to cause the input voltage to decrease as the input current increases. Decreasing input voltage with increasing input current defines the negative resistance. When this negative resistance circuit is configured with a crystal and a voltage controlled capacitance, an oscillator capable of high-frequency operation results. Oscillator parameters such as frequency pullability, startability, stability, temperature, and crystal drive are easily optimized and can be set by mutually independent selection of individual circuit element values. In particular, the crystal drive level is well controlled due to the well-defined limiting character of the negative resistance circuit.

摘要翻译： 用于压控晶体振荡器的高频负电阻电路具有一对输入端，从而限定输入电流和输入电压。 高频负电阻电路包括用于感测输入电流的感测电路，偏置电压源和连接到电压源的负载阻抗。 高频负电阻电路还包括连接到感测电路的电流镜电路和用于产生负载阻抗中的电流的负载阻抗。 负载阻抗中的电流近似等于输入电流。 电流镜电路还控制感测电路，使输入电压随着输入电流的增加而减小。 输入电流随输入电压的降低而定义负电阻。 当该负电阻电路配置有晶体和压控电容时，可以产生能够进行高频运算的振荡器。 振荡器参数，例如频率可拉伸性，启动性，稳定性，温度和晶体驱动都容易优化，可以通过相互独立地选择各个电路元件值进行设置。 特别地，由于负电阻电路的明确的限制特性，晶体驱动电平被很好地控制。