公开(公告)号：US06683768B2

公开(公告)日：2004-01-27

申请号：US10072076

申请日：2002-02-06

Applicant: Ramon C. W. Chea, Jr.

Inventor： Ramon C. W. Chea, Jr.

IPC: H02H900

CPC classification number: H02N1/002 ,  H02H9/042 ,  H04M3/18

Abstract: The present invention discloses systems and methods for protecting electronic devices (switching and non-switching) such as micro electro-mechanical system (MEMS) devices and solid state relays due to lightning exposure or electrical power surges. An over voltage protector and an over current protector are used to limit the exposure of high voltages and currents to the MEMS devices and solid-state relays. A relay or equivalent device is energized when a high current is sensed in the loop, which relay is used to protect the MEMS devices and solid state relays from damage. The relay can be controlled via software/hardware and works in conjunction with other components/devices in the overall systems. In this manner, any number of MEMS devices or solid state relays can be protected.

Abstract translation: 本发明公开了由于雷电暴露或电力浪涌而保护诸如微机电系统（MEMS）装置和固态继电器的电子装置（开关和非开关）的系统和方法。 过电压保护器和过流保护器用于限制高电压和电流暴露于MEMS器件和固态继电器。 当在回路中检测到高电流时，继电器或等效设备通电，该继电器用于保护MEMS器件和固态继电器免受损坏。 继电器可以通过软件/硬件进行控制，并与整个系统中的其他组件/设备结合使用。 以这种方式，可以保护任何数量的MEMS器件或固态继电器。

公开(公告)号：US06292540B1

公开(公告)日：2001-09-18

申请号：US09493342

申请日：2000-01-28

Applicant: Ramon C. W. Chea, Jr. ,  P. Kingston Duffle

Inventor： Ramon C. W. Chea, Jr. ,  P. Kingston Duffle

IPC: H04M124

CPC classification number: H04M3/30 ,  H04B3/46 ,  H04M3/2209

Abstract: The invention presented herein is directed to a battery injection and loop supervision (BILS) system and method that can be used in the DSL environment. The BILS of the present invention provides battery injection, loop supervision, and butt set operation mode detection in the DSL environment. A voltage source, detector and comparator in the BILS unit can be used to supervise the copper loop status from the central office. In addition, using the present invention, a field technician using a conventional butt set can detect battery voltage and receive an audible tone from the cooper loops in the DSL environment. Furthermore, the BILS can be implemented in accordance with two preferred embodiments, voltage sensing and current sensing. The BILS includes circuitry, working in conjunction with a shared common resource card and a conventional butt set, for testing, maintaining, and installing copper loops in the DSL environment.

Abstract translation: 本文提出的本发明涉及可以在DSL环境中使用的电池注入和环路监控（BILS）系统和方法。 本发明的BILS在DSL环境中提供电池注入，环路监控和对接设置操作模式检测。 BILS单元中的电压源，检测器和比较器可用于监控中心局的铜环状态。 此外，使用本发明，使用常规对接装置的现场技术人员可以检测电池电压并从DSL环境中的联合环路接收可听到的音调。 此外，BILS可以根据两个优选实施例来实施，电压感测和电流感测。 BILS包括与共享公共资源卡和常规对接组一起工作的电路，用于在DSL环境中测试，维护和安装铜环路。

公开(公告)号：US4674119A

公开(公告)日：1987-06-16

申请号：US598650

申请日：1984-04-10

Applicant: Ramon C. W. Chea, Jr.

Inventor： Ramon C. W. Chea, Jr.

IPC: H03F3/217 ,  H02M3/335 ,  H03F3/20 ,  H04M19/00 ,  H04Q3/42 ,  H04B3/00

CPC classification number: H04M19/008 ,  H02M3/33507 ,  Y02B70/1483

Abstract: A wide band high voltage and high power amplifier is particularly useful for telephony applications. The amplifier employs a flyback converter with the capacitor storage element coupled across the line. The subscriber line is characterized in having a definite load impedance which impedance is in parallel with the storage capacitor of the flyback converter. The subscriber lines are monitored by a differential amplifier which provides a single-ended output indicative of the levels across the lines. This output is summed with the input signal to develop an error signal. The input signal to the line circuit is the particular signal of concern such as ringing, the voice signal and so on. The error signal is supplied as one input to a comparator having another input coupled to a triangular reference waveform. The output of the comparator provides a pulse width modulated waveform where the width of the pulses are indicative of the error signal. These pulses are applied to a transistor coupled to the primary winding of the transformer associated with the flyback converter to enable flyback operation during the pulse and hence to transfer energy to the storage capacitor as a function of the error signal.

Abstract translation: 宽带高压和高功率放大器对于电话应用特别有用。 放大器采用反激式转换器，电容器存储元件跨过线耦合。 用户线的特征在于具有确定的负载阻抗，该阻抗与反激转换器的存储电容器并联。 用户线由差分放大器监控，差分放大器提供指示跨线路上的电平的单端输出。 该输出与输入信号相加以产生误差信号。 线路电路的输入信号是特定的信号，例如振铃，语音信号等。 误差信号作为一个输入提供给具有耦合到三角形参考波形的另一个输入的比较器。 比较器的输出提供脉冲宽度调制波形，其中脉冲宽度表示误差信号。 这些脉冲被施加到耦合到与反激转换器相关联的变压器的初级绕组的晶体管，以在脉冲期间实现回扫操作，并因此根据误差信号将能量传递到存储电容器。

公开(公告)号：US4656659A

公开(公告)日：1987-04-07

申请号：US756879

申请日：1985-07-18

Applicant: Ramon C. W. Chea, Jr.

Inventor： Ramon C. W. Chea, Jr.

IPC: H04M3/06 ,  H04M19/02 ,  H04M3/02

CPC classification number: H04M19/023

Abstract: A digitally controlled ring signal generator includes a plurality of ring signal generating sources providing a plurality of inputs to each of a plurality of ring circuits. Each input is an a.c. signal superimposed on a d.c. bias that is greater than or equal to the peak voltage of the a.c. signal.

Abstract translation: 数字控制的环形信号发生器包括多个环形信号发生源，其为多个环形电路中的每一个提供多个输入。 每个输入都是a.c. 信号叠加在直流电 大于或等于交流电压峰值电压的偏压。 信号。

公开(公告)号：US4456991A

公开(公告)日：1984-06-26

申请号：US456638

申请日：1983-01-10

Applicant: Ramon C. W. Chea, Jr. ,  Santanu Das ,  Daniel C. Upp ,  Jozef Cornu ,  Johan M. R. Danneels ,  Jean R. J. M. Taeymans

Inventor： Ramon C. W. Chea, Jr. ,  Santanu Das ,  Daniel C. Upp ,  Jozef Cornu ,  Johan M. R. Danneels ,  Jean R. J. M. Taeymans

IPC: H04Q11/04 ,  H04M3/00

CPC classification number: H04Q11/04

Abstract: A telephone line circuit and system for interfacing digital exchange line circuits to a terminal interface of a switching network is disclosed. The system includes controllable active circuit impedance matching means for reducing impedance mismatch between a selected line circuit and the terminal interface. Control means controls both the active circuit impedance matching means for adjusting the effective circuit impedance to a value within a predetermined range, and the conditioning circuit gain pads for selectably adjusting the gain of a transmitted signal. Additionally, control means controls the d.c. line impedance and voltage for adjusting the effective line feed current to the subscriber loop, and provides interfaces for a plurality of line circuits to both a switching network and external processor. Supervision means provides supervision control signals to the control means and thereby permits the telephone line circuit system to provide desired telephone system functions.

Abstract translation: 公开了一种用于将数字交换线电路连接到交换网络的终端接口的电话线电路和系统。 该系统包括可控有源电路阻抗匹配装置，用于减少所选线路电路和终端接口之间的阻抗失配。 控制装置控制有源电路阻抗匹配装置，用于将有效电路阻抗调整到预定范围内的值，以及调节电路增益焊盘，用于可选择地调节发射信号的增益。 另外，控制装置控制直流。 线路阻抗和电压，用于调节到用户环路的有效馈电电流，并且向交换网络和外部处理器提供用于多条线路电路的接口。 监控装置向控制装置提供监控控制信号，从而允许电话线电路系统提供期望的电话系统功能。

公开(公告)号：US4349703A

公开(公告)日：1982-09-14

申请号：US135755

申请日：1980-03-31

Applicant: Ramon C. W. Chea, Jr.

Inventor： Ramon C. W. Chea, Jr.

IPC: H04M3/02 ,  H04M19/02

CPC classification number: H04M19/026 ,  H04M19/023

Abstract: The present invention comprehends an improved ringing circuit particularly suitable for digital telecommunications systems wherein the energizing and de-energizing of the ring circuitry is programmably controlled to provide for either hardware or software generation of ringing cadence, dc bias polarity, dry-switching of ring relays, and other signaling voltages. Further in accordance with the invention, a digital implementation of a complete ringing circuit is achieved without the use of bulky transformers.

Abstract translation: 本发明包括特别适用于数字电信系统的改进的振铃电路，其中可编程地控制环路电路的通电和断电以提供振铃节奏的硬件或软件产生，直流偏置极性，环路继电器的干式开关 ，和其他信令电压。 此外，根据本发明，在不使用笨重的变压器的情况下实现完整的振铃电路的数字实现。

公开(公告)号：US4315106A

公开(公告)日：1982-02-09

申请号：US98104

申请日：1979-11-28

Applicant: Ramon C. W. Chea, Jr.

Inventor： Ramon C. W. Chea, Jr.

IPC: H04B3/50 ,  H04M19/00

CPC classification number: H04M19/008

Abstract: Circuit apparatus for supplying a regulated loop current to a two conductor loop telephone line includes first and second line feed resistances, each having one terminal connected to a respective terminal of the telephone line. A differential amplifier has one input connected to the first resistance and a second input connected to the second resistance in common with the resistance connections to the telephone line terminals. One of the resistances has its other terminal connected to the output of an active circuit means, which circuit operates in a feedback path to supply the desired loop current to the line resistance and therefore the telephone line. The input control signal for the active feedback circuit is derived from summing the output signal from the differential amplifier with a reference signal whose magnitude varies according to the length of the telephone line. The feedback path is supplied by the connection between the output of the active feedback circuit and the line resistance as further coupled to an input of the differential amplifier.

Abstract translation: 用于向两导体环路电话线提供调节回路电流的电路装置包括第一和第二线路馈电电阻，每个线路馈电电阻的一个端子连接到电话线路的相应终端。 差分放大器具有连接到第一电阻的一个输入端和与电话线路端子的电阻连接相同的第二个输入端连接到第二个电阻。 其中一个电阻的另一个端子连接到有源电路装置的输出，该电路在反馈路径中工作，以将所需的环路电流提供给线路电阻并因此提供电话线路。 用于有源反馈电路的输入控制信号来自差分放大器的输出信号与其幅度根据电话线的长度而变化的参考信号相加。 反馈路径由有源反馈电路的输出和线路电阻之间的连接提供，进一步耦合到差分放大器的输入端。