公开(公告)号：US06870724B2

公开(公告)日：2005-03-22

申请号：US10764211

申请日：2004-01-22

Applicant: Ramon C. W. Chea, Jr.

Inventor： Ramon C. W. Chea, Jr.

IPC: H01H1/00 ,  H02H9/04 ,  H04M3/18 ,  H02H1/00

CPC classification number: H02H9/04 ,  H01H1/0036 ,  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 in double end exposed systems. Over voltage suppressors and over current detectors are used to limit the exposure of high voltages and currents to the MEMS and solid-state relay devices in double end exposed systems.

Abstract translation: 本发明公开了用于保护电子设备（开关和非开关）的系统和方法，例如微机电系统（MEMS）装置和固态继电器，这是由于双端暴露系统中的雷电暴露或电力浪涌。 过电压抑制器和过电流检测器用于限制高端电压和电流对双端暴露系统中的MEMS和固态继电器的暴露。

公开(公告)号：US06480575B2

公开(公告)日：2002-11-12

申请号：US10136767

申请日：2002-04-30

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

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

IPC: H04M124

CPC classification number: H04Q11/0421 ,  H04L43/50 ,  H04M3/2209 ,  H04M3/30 ,  H04M11/062 ,  H04M2203/056 ,  H04Q2213/13039 ,  H04Q2213/1316 ,  H04Q2213/1319 ,  H04Q2213/13298 ,  H04Q2213/13305 ,  H04Q2213/1332 ,  H04Q2213/13322

Abstract: The present invention is directed to a remotely actuated splitter bypass function (RASB) working in conjunction with a test head at the central office for testing and maintaining copper loops in the digital subscriber line environment. The RASB allows a competitive local exchange carrier to test and maintain the xDSL portion of the copper loop with minimal interference and disturbance to/from the plain old telephone system (POTS) service by bypassing the central office splitter. The splitter bypass operation includes the steps of selecting a copper loop pair for testing, actuating a first relay for monitor mode, actuating a second relay for bypass mode, testing the selected copper loop, and resetting the first and second relays back to normal mode. By applying positive and negative voltages from the tip and ring with respect to ground, various relays can be set (actuated) and reset to provide multiple modes of operations. In this manner, relays can be designed to respond in certain voltage levels and polarities.

公开(公告)号：US4387273A

公开(公告)日：1983-06-07

申请号：US180751

申请日：1980-08-25

Applicant: Ramon C. W. Chea, Jr.

Inventor： Ramon C. W. Chea, Jr.

IPC: H03H11/46 ,  H04M19/00

CPC classification number: H04M19/005

Abstract: A subscriber line interface circuit is described wherein the transverse and longitudinal termination impedances may be independently controlled; and wherein the equivalent termination impedance of a subscriber line/trunk as appears to the central office can be adjusted upward or downward from a lower resistance value, with longitudinal balance (also known as the common mode rejection) being determined by the matching of feed resistors. The foregoing interface circuit is implementable as a monolithic integrated circuit having low power dissipation, improved power bandwidth requirements, and lower voltage breakdown requirements for integrated circuits; all resulting in an improved telephone line interface circuit. Voltage feedback or current feedback may be employed in a circuit to synthesize the proper ac transverse termination impedance from a known dc resistance, for example, from the feed line resistors in a telephone line circuit.

Abstract translation: 描述了用户线接口电路，其中横向和纵向端接阻抗可以被独立地控制; 并且其中可以从较低的电阻值向上或向下调节中心局所显示的用户线路/干线的等效终端阻抗，纵向平衡（也称为共模抑制）由馈电电阻的匹配确定 。 上述接口电路可实现为具有低功耗，改善的功率带宽要求以及集成电路的较低电压击穿要求的单片集成电路; 所有这些都导致改进的电话线路接口电路。 可以在电路中采用电压反馈或电流反馈来从已知的直流电阻（例如来自电话线电路中的馈线电阻）合成适当的交流横向终端阻抗。

公开(公告)号：US06671149B1

公开(公告)日：2003-12-30

申请号：US09677483

申请日：2000-09-28

Applicant: Ramon C. W. Chea, Jr. ,  P. Kingston Duffie ,  Harry Rodriguez ,  Robert Crofford

Inventor： Ramon C. W. Chea, Jr. ,  P. Kingston Duffie ,  Harry Rodriguez ,  Robert Crofford

IPC: H02H342

CPC classification number: 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：US06553105B2

公开(公告)日：2003-04-22

申请号：US10137083

申请日：2002-04-30

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

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

IPC: H04M1100

CPC classification number: H04Q11/0421 ,  H04L43/50 ,  H04M3/2209 ,  H04M3/30 ,  H04M11/062 ,  H04M2203/056 ,  H04Q2213/13039 ,  H04Q2213/1316 ,  H04Q2213/1319 ,  H04Q2213/13298 ,  H04Q2213/13305 ,  H04Q2213/1332 ,  H04Q2213/13322

Abstract: The present invention is directed to a remotely actuated splitter bypass function (RASB) working in conjunction with a test head at the central office for testing and maintaining copper loops in the digital subscriber line environment. The RASB allows a competitive local exchange carrier to test and maintain the xDSL portion of the copper loop with minimal interference and disturbance to/from the plain old telephone system (POTS) service by bypassing the central office splitter. The splitter bypass operation includes the steps of selecting a copper loop pair for testing, actuating a first relay for monitor mode, actuating a second relay for bypass mode, testing the selected copper loop, and resetting the first and second relays back to normal mode. By applying positive and negative voltages from the tip and ring with respect to ground, various relays can be set (actuated) and reset to provide multiple modes of operations. In this manner, relays can be designed to respond in certain voltage levels and polarities.

公开(公告)号：US06343114B1

公开(公告)日：2002-01-29

申请号：US09476226

申请日：1999-12-30

Applicant: Ramon C. W. Chea, Jr.

Inventor： Ramon C. W. Chea, Jr.

IPC: H04M124

CPC classification number: H04M3/301 ,  H04M3/2209

Abstract: The invention presented herein is directed to a remotely addressable maintenance unit (RAMU) working in conjunction with a test head at the central office for detecting and locating faults in digital subscriber loop (DSL) and/or plain old telephone system (POTS) environments. The RAMU includes circuitry for setting and resetting one or more relays for either normal or testing/maintenance mode. The present invention provides a system and method for addressing the RAMU by applying either positive or negative voltages from the tip to ground, from ring to ground, and from tip and ring to ground. In this manner, individual RAMUs can be defined/designed to respond in certain voltage levels and polarities. Accurate fault detection and sectionalization is achieved by the combination of the addressing capabilities enumerated herein, and the impedance signature designed into the RAMU, working in concert with a test head in the central office.

Abstract translation: 本文提出的本发明涉及一种与中心局的测试头结合工作的可远程寻址维护单元（RAMU），用于检测和定位数字用户回路（DSL）和/或普通老式电话系统（POTS）环境中的故障​​。 RAMU包括用于设置和复位一个或多个继电器用于正常或测试/维护模式的电路。 本发明提供了一种用于通过从尖端到地面，从环到地，以及从尖端和环到地施加正或负电压来寻址RAMU的系统和方法。 以这种方式，可以将单个RAMU定义/设计成在某些电压电平和极性下进行响应。 通过将本文列举的寻址能力和设计到RAMU中的阻抗特征的组合实现精确的故障检测和分段，与中心局的测试头协调工作。

公开(公告)号：US4435803A

公开(公告)日：1984-03-06

申请号：US322606

申请日：1981-11-18

Applicant: Santanu Das ,  Ramon C. W. Chea, Jr. ,  Russ C. Casterline

Inventor： Santanu Das ,  Ramon C. W. Chea, Jr. ,  Russ C. Casterline

IPC: H04M19/02 ,  H04J3/12 ,  H04Q1/22

CPC classification number: H04M19/02

Abstract: An apparatus and method of organizing line interface modules between analog subscriber lines/trunks and a digital switch with the provision for ringing signals which may be shared by a plurality of lines from a single source is described. The ringing signals are intercoupled to any line or lines and transmitted through a common metallic bus which provides immediate ringing for any line, with a shared ring-trip circuit. A software-controlled and/or programmable signal generator in combination with a novel ring-trip circuit is described wherein ringing cadence is generated by connecting the programmable signal generator to a subscriber line for the proper duration and at any desired frequency, whereby multi-frequency ringing can be accomplished under programmable control. A spare line control function within a cluster of telecommunications line circuits is provided such that any telecommunications line circuit can arbitrarily be designated as a spare line, usable to provide temporary service, for example, to a telephone subscriber having a defective line, thereby permitting scheduled maintenance rather than on-demand maintenance. Immediate ringing is provided to groups of analog telephone lines having shared ringing sources and shared ring-trip circuits in a system architecture compatible with a digital switching system.

Abstract translation: 描述了一种在模拟用户线路/中继线之间组合线路接口模块的装置和方法以及数字开关，其中提供了用于从单个源可以由多条线路共享的振铃信号。 振铃信号相互耦合到任何线路或线路，并通过公共金属总线传输，该总线为任何线路提供立即振铃，并具有共享的环路跳闸电路。 描述了与新颖的环形跳闸电路相结合的软件控制和/或可编程信号发生器，其中通过将可编程信号发生器连接到适当持续时间和任何期望频率的用户线路来产生振铃节奏，由此多频 振铃可以在可编程控制下完成。 提供电信线路电路集群内的备用线路控制功能，使得任何电信线路电路可以任意地被指定为备用线路，可用于例如提供临时业务，例如具有缺陷线路的电话用户，从而允许调度 维护而不是按需维护。 在与数字交换系统兼容的系统架构中，立即振铃被提供给具有共享振铃源和共享环路跳闸电路的模拟电话线路组。

公开(公告)号：US4431868A

公开(公告)日：1984-02-14

申请号：US281545

申请日：1981-07-09

Applicant: Daniel M. Bolus ,  Ramon C. W. Chea, Jr.

Inventor： Daniel M. Bolus ,  Ramon C. W. Chea, Jr.

IPC: H04M3/00 ,  H04M19/00 ,  H04Q3/00 ,  H04M3/02 ,  H04M19/02

CPC classification number: H04M19/008 ,  H04M3/005 ,  H04Q3/00

Abstract: A telephone line circuit including a high voltage amplifier feeds the tip and ring lines at its output. This amplifier is fed by a programmable voltage source which includes a d.c./d.c. converter and means to control the amplitude and polarity of this voltage. All the required electrical signals including d.c. feeding, speech, unsymmetrical ringing and metering pulses are provided through the high voltage amplifier. No high voltage AC switches (relay contacts) are required since the ring signal is provided through the same device (output amplifier) as the speech and d.c. signals. Means are included for minimizing the internal power dissipation by controlling the amplitude of the d.c./d.c. converter voltage. Thus d.c. offset control is achieved by slaving the d.c./d.c. converter voltage to the amplifier output voltage. Three functional blocks form the line interface circuit according to the invention, these being a high voltage circuit including the aforementioned amplifier, a programmable signal generator which includes the d.c./d.c. converter and electronic solid state switching under control of a line feed and supervision circuit which constitutes the third block.

Abstract translation: 包括高压放大器的电话线电路在其输出端馈送尖端和环线。 该放大器由可编程电压源（包括d.c./d.c）供电。 转换器和控制该电压的幅度和极性的装置。 所有需要的电信号，包括直流。 通过高压放大器提供馈电，语音，不对称振铃和计量脉冲。 不需要高压交流开关（继电器触点），因为振铃信号通过与语音和直流相同的设备（输出放大器）提供。 信号。 包括用于通过控制d.c./d.c的振幅来最小化内部功耗的手段。 转换器电压。 因此d.c. 偏移控制通过使用d.c./d.c来实现。 转换器电压到放大器的输出电压。 三个功能块形成根据本发明的线路接口电路，这些是包括上述放大器的高压电路，包括d.c./d.c的可编程信号发生器。 转换器和电子固态开关，在构成第三块的送料和监控电路的控制下。

公开(公告)号：US4317963A

公开(公告)日：1982-03-02

申请号：US189976

申请日：1980-09-22

Applicant: Ramon C. W. Chea, Jr.

Inventor： Ramon C. W. Chea, Jr.

IPC: H04M19/00

CPC classification number: H04M19/005

Abstract: A subscriber line interface circuit is described wherein current supplied to a telephone subscriber line from a shared voltage source such as a DC/DC converter is regulated thereby permitting a regulated line current to be supplied to a plurality of line circuits from a single shared voltage source. In accordance with the present invention, both the dc line feed and the ac transmission requirements of a subscriber line interface circuit for a telephone exchange are implemented in a single circuit incorporating ac and dc impedance synthesis techniques. A significant reduction in the heretofore required expensive and bulky discrete components of the subscriber line interface circuit is achieved.

Abstract translation: 描述了一种用户线路接口电路，其中调节从诸如DC / DC转换器的共享电压源提供给电话用户线的电流，从而允许将稳定的线路电流从单个共享电压源提供给多个线路电路 。 根据本发明，用于电话交换机的用户线路接口电路的直流线馈电和交流传输要求都是在包含交流和直流阻抗合成技术的单个电路中实现的。 实现了以前所需的用户线接口电路所需的昂贵且庞大的分立组件的显着减少。

公开(公告)号：US4150368A

公开(公告)日：1979-04-17

申请号：US813434

申请日：1977-07-07

Applicant: Ramon C. W. Chea, Jr.

Inventor： Ramon C. W. Chea, Jr.

IPC: H03M1/00 ,  H04B14/04 ,  H03K13/02 ,  H03K13/20

CPC classification number: H04B14/048 ,  H03M1/008

Abstract: A codec including an encoder section for encoding analog signals in compressed PCM (CPCM) and a decoder section for decoding CPCM information into analog signals features a single companding generator shared by the encoder and decoder sections. In the encoder section, an analog signal to be encoded is sampled periodically and the analog samples are compared with the decaying voltage of the companding generator which includes a capacitor, which is initially charge to a fixed voltage E. The capacitor is then discharge through a fixed resistance to another fixed voltage -dE, the discharge time being measured by a binary digital encoder counter from the start of the discharge until the voltage on the capacitor equals the absolute value of the given analog signal sample, at which time the count of the binary counter represents the desired compressed pulse code of the analog signal samples magnitude. Additionally, a sign bit, derived from the analog signal sample, indicates the polarity of said sample. In the decoder section, a CPCM input signal to be decoded is loaded into a decoder counter, which is decremented to a zero count, while the decaying voltage of the companding generator is sampled. The resultant sample represents the magnitude of the analog signal output for the decoded CPCM code, either directly or inverted, depending upon the sign bit. This sampled signal is further presented to a low-pass filter at a predetermined interval of the codec operating cycle dictated by the sampling frequency. The output of low-pass filter is the desired reconstructed analog signal.

Abstract translation: 包括用于对压缩PCM（CPCM）中的模拟信号进行编码的编码器部分和用于将CPCM信息解码为模拟信​​号的解码器部分的编解码器具有由编码器和解码器部分共享的单个压缩产生器。 在编码器部分中，要周期性地对要编码的模拟信号进行采样，并将模拟采样与包括最初充电到固定电压E的电容器的压电发生器的衰减电压进行比较。然后电容器通过 固定电阻到另一个固定电压-dE，放电时间由二进制数字编码器计数器从放电开始直到电容器上的电压等于给定模拟信号样本的绝对值，此时计数 二进制计数器表示模拟信号采样幅度的期望压缩脉冲编码。 另外，从模拟信号采样得到的符号位表示所述样品的极性。 在解码器部分中，要解码的CPCM输入信号被加载到解码器计数器中，该解码器计数器被递减为零计数，同时对压电发生器的衰减电压进行采样。 所得到的样本代表解码的CPCM代码的模拟信号输出的大小，直接或反转，这取决于符号位。 该采样信号被进一步以由采样频率指定的编解码器操作周期的预定间隔呈现给低通滤波器。 低通滤波器的输出是所需的重构模拟信号。