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1. 发明申请

US20130329882A1 Half-Duplex Speakerphone Echo Canceler 有权
标题翻译：半双工免提回声消除器
公开(公告)号：US20130329882A1
公开(公告)日：2013-12-12
申请号：US13490596
申请日：2012-06-07
申请人： Donald R. Laturell , Kannan Srinivasan , Chao-pin Chin
发明人： Donald R. Laturell , Kannan Srinivasan , Chao-pin Chin
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： A speakerphone having transmit path with a microphone and a first amplifier having a gain determined by a controller and an input coupled to the microphone, a receive path with a second amplifier having a gain determined by the controller and a speaker coupled to an output of the second amplifier, and operable in a half-duplex mode using an adaptive echo canceller to at least partially remove from the transmit path acoustically-coupled signals from the receive path. The controller increases the gain of the first amplifier and decreases the gain of the second amplifier when a level of signals in the transmit path exceed a level of signals in the receive path, and decreases the gain of the first amplifier and increases the gain of the second amplifier when the level of signals in the receive path exceed the level of signals in the transmit path.
摘要翻译：具有麦克风的发送路径的扬声器和具有由控制器确定的增益和耦合到麦克风的输入的第一放大器，具有由控制器确定的增益的第二放大器的接收路径和耦合到该麦克风的输出的扬声器第二放大器，并且可以使用自适应回波消除器以半双工模式操作以至少部分地从发送路径去除来自接收路径的声耦合信号。当发射路径中的信号电平超过接收路径中的信号电平时，控制器增加第一放大器的增益并降低第二放大器的增益，并且降低第一放大器的增益并增加第第二放大器当接收路径中的信号电平超过发送路径中的信号电平时。

2. 发明授权

US08923508B2 Half-duplex speakerphone echo canceler 有权
标题翻译：半双工扬声器回声消除器
公开(公告)号：US08923508B2
公开(公告)日：2014-12-30
申请号：US13490596
申请日：2012-06-07
申请人： Donald R. Laturell , Kannan Srinivasan , Chao-pin Chen
发明人： Donald R. Laturell , Kannan Srinivasan , Chao-pin Chen
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： A speakerphone having transmit path with a microphone and a first amplifier having a gain determined by a controller and an input coupled to the microphone, a receive path with a second amplifier having a gain determined by the controller and a speaker coupled to an output of the second amplifier, and operable in a half-duplex mode using an adaptive echo canceller to at least partially remove from the transmit path acoustically-coupled signals from the receive path. The controller increases the gain of the first amplifier and decreases the gain of the second amplifier when a level of signals in the transmit path exceed a level of signals in the receive path, and decreases the gain of the first amplifier and increases the gain of the second amplifier when the level of signals in the receive path exceed the level of signals in the transmit path.
摘要翻译：具有麦克风的发送路径的扬声器和具有由控制器确定的增益和耦合到麦克风的输入的第一放大器，具有由控制器确定的增益的第二放大器的接收路径和耦合到该麦克风的输出的扬声器第二放大器，并且可以使用自适应回波消除器以半双工模式操作以至少部分地从发送路径去除来自接收路径的声耦合信号。当发射路径中的信号电平超过接收路径中的信号电平时，控制器增加第一放大器的增益并降低第二放大器的增益，并且降低第一放大器的增益并增加第第二放大器当接收路径中的信号电平超过发送路径中的信号电平时。

3. 发明授权

US06999581B1 Event detection circuit 失效
标题翻译：事件检测电路
公开(公告)号：US06999581B1
公开(公告)日：2006-02-14
申请号：US09192654
申请日：1998-11-16
申请人： Tony El-Kik , Keith E. Hollenbach , Donald R. Laturell , Steven B. Witmer
发明人： Tony El-Kik , Keith E. Hollenbach , Donald R. Laturell , Steven B. Witmer
IPC分类号： H04M3/00
CPC分类号： H04M1/738
摘要： A network interface circuit that screens out transient signals and provides an indication to the line side that an actual event has occurred, so that appropriate discrimination circuitry is powered up to determine the exact nature of the actual event only when actually needed. The present invention develops an AC signal that represents the events that are desired to be detected. This AC signal is timed so that it has a sustained rate (e.g., a 1 millisecond burst) that is unlike any transient that would occur on the line. Thus, unless the incoming signal meets the timing requirements of the circuit, it is disregarded as a being a transient and no action is taken to determine the exact nature of the signal. This avoids the need to invoke the discrimination circuits that have large power requirements until they are actually needed.
摘要翻译：一种网络接口电路，其屏蔽瞬态信号并向线路侧提供实际事件发生的指示，使得适当的鉴别电路被加电以仅在实际需要时确定实际事件的确切性质。本发明开发了一种AC信号，其表示期望被检测的事件。该AC信号被定时，使得其具有与线路上将发生的任何瞬态不同的持续速率（例如，1毫秒突发）。因此，除非输入信号满足电路的定时要求，否则它被忽略为瞬态，并且不采取任何动作来确定信号的确切性质。这避免了在实际需要之前需要调用具有大功率需求的鉴别电路。

4. 发明授权

US06920218B1 Combination clock and charge pump for line powered DAA 失效
标题翻译：组合时钟和电源泵，用于线路供电DAA
公开(公告)号：US06920218B1
公开(公告)日：2005-07-19
申请号：US09192651
申请日：1998-11-16
申请人： Timothy W. Fuehrer , Keith E. Hollenbach , Donald R. Laturell , Steven B. Witmer
发明人： Timothy W. Fuehrer , Keith E. Hollenbach , Donald R. Laturell , Steven B. Witmer
IPC分类号： H04M19/08 , H04M1/00 , H04M9/00
CPC分类号： H04M19/08
摘要： Disclosed is a method and apparatus which facilitates the use of existing power that is ordinarily unused or discarded to provide power to a telephone interface circuit when the circuit is in the on-hook state, thereby alleviating the need to use loop current to power the interface during the on-hook state. Existing clock signals are used to charge capacitors that are normally used for capacitive coupling of digital data across the high voltage isolation barrier. Although only small-value capacitors are needed for transmitting data across the capacitive interface, larger-value capacitors are used and are configured to form a charge pump to generate power to the interface at all times. Thus the interface always has a steady source of power available for use, including during the on-hook state for powering circuitry that can detect, modulate, and transmit on-hook signals across the capacitive interface.
摘要翻译：公开了一种方法和装置，其有助于当电路处于挂机状态时通常未被使用或丢弃的现有电力用于向电话接口电路提供电力，从而减轻了使用环路电流来为接口供电的需要在挂机状态。现有的时钟信号用于对通常用于跨高压隔离屏障的数字数据的电容耦合的电容器进行充电。尽管只需要小值电容器来跨越电容接口传输数据，但是使用较大值的电容器，并且配置为形成电荷泵，以始终向接口产生功率。因此，该接口始终具有可用于使用的稳定的电源，包括在挂机状态下为能够检测，调制和传送电容接口上的挂机信号的电路供电。

5. 发明授权

US06466650B1 Telecom service identification transponder apparatus and technique 有权
标题翻译：电信业务识别应答器设备及技术
公开(公告)号：US06466650B1
公开(公告)日：2002-10-15
申请号：US09592863
申请日：2000-06-13
申请人： Jonathan H. Fischer , Donald R. Laturell , Lane A. Smith
发明人： Jonathan H. Fischer , Donald R. Laturell , Lane A. Smith
IPC分类号： H04M124
CPC分类号： H04L1/24 , H04M3/30
摘要： Telephone line service type identification is provided to a telephone technician in the field by the placement of one or more tuned circuit(s) across the telephone line. In one embodiment, an inexpensive tuned circuit such as a ceramic resonator forms a telecom service resonator ID device which is placed across a telephone line, either at the central office or at the customer premises. Injection of a test current at a predetermined frequency, and a suitable amplitude of the same indicates to the technician aspects of telecom service to that particular telephone line (e.g., the existence of POTS, ISDN, and/or xDSL) and or use of the telephone line by a home network such as HPNA. In another embodiment, a telecom service transponder ID device is formed to provide line service identification to an interrogating line technician. The telecom service transponder ID device is activated when the test signal including an appropriate frequency is present to cause excitation in the telecom service transponder ID device. The resonator and transponder devices preferably have very high impedances at all frequencies except at the desired resonant frequency, and thus avoids violation of telephone service standards. The resonator or transponder ID devices may be placed anywhere along the telephone line, but preferably at the customer premises, or in installed equipment utilizing the telephone line. More than one resonation frequency may be implemented with parallel tuned circuits to indicate additional features of service on the telephone line (e.g., the number of services, the existence of a data service, etc.). The frequencies of resonance of the tuned circuits are preferably chosen to exist between the spectrum utilized by the various operating services.
摘要翻译：通过在电话线路上放置一个或多个调谐电路，在现场向电话技术人员提供电话线服务类型识别。在一个实施例中，诸如陶瓷谐振器的便宜的调谐电路形成电信服务谐振器ID设备，其被布置在电话线路上，无论是在中心局还是在客户驻地处。以预定频率注入测试电流，并且其适当的幅度指示给该特定电话线的电信服务的技术人员方面（例如，POTS，ISDN和/或xDSL的存在）和/或使用电话线由家庭网络如HPNA。在另一个实施例中，形成电信服务转发器ID设备以向询问线技术人员提供线路服务识别。当存在包括适当频率的测试信号以引起电信业务转发器ID设备中的激励时，电信业务应答器ID设备被激活。除了在期望的谐振频率之外，谐振器和应答器装置优选地在所有频率处具有非常高的阻抗，并且因此避免违反电话服务标准。谐振器或应答器ID设备可以放置在电话线的任何地方，但优选地位于客户住宅处，或者在使用电话线路的安装设备中。可以使用并行调谐电路来实现多于一个谐振频率以指示电话线上的服务的附加特征（例如，服务的数量，数据服务的存在等）。调谐电路的谐振频率优选地被选择为存在于由各种操作服务使用的频谱之间。

6. 发明授权

US07209525B2 Clock and data recovery with extended integration cycles 有权
标题翻译：时钟和数据恢复，扩展集成周期
公开(公告)号：US07209525B2
公开(公告)日：2007-04-24
申请号：US10298892
申请日：2002-11-18
申请人： Donald R. Laturell , Peter C. Metz , Baiying Yu
发明人： Donald R. Laturell , Peter C. Metz , Baiying Yu
IPC分类号： H03K9/00 , H04L27/00 , H04B1/00
CPC分类号： H04L7/0332 , H03L7/08 , H03L7/0812 , H03L7/0893 , H04L7/033
摘要： Clock and data recovery circuitry includes an interleaved sampler having multiple integrators, where at least one of the integrators integrates the input data for at least two unit intervals (UIs). One embodiment includes a four-way interleaved sampler, where each integrator in the sampler integrates the input data for two UIs, where each integrator is sampled at or near the middle of its two-UI integration cycle. In an exemplary 10-GHz system, the reset cycle of each integrator may begin many tens of picoseconds after the data is sampled. Since the signal is sampled near the center of the integration cycle and is not highly proximate to the time of the integrator reset, the latch signal has a window of uncertainty extending into the length of a data bit cell with little possibility of latching erroneous data. The sensitivity of the clock recovery circuitry may be optimized by centering the latch function over the time of highest signal level, thereby maximizing signal-to-noise ratio.
摘要翻译：时钟和数据恢复电路包括具有多个积分器的交错采样器，其中至少一个积分器对至少两个单位间隔（UI）的输入数据进行积分。一个实施例包括四路交错采样器，其中采样器中的每个积分器集成了用于两个UI的输入数据，其中每个积分器在其两UI整合周期的中间或其附近被采样。在示例性的10GHz系统中，在对数据采样之后，每个积分器的复位周期可以开始数十个皮秒。由于信号在积分周期的中心附近被采样，并且不高度接近积分器复位的时间，所以锁存信号具有不确定性的窗口延伸到数据位单元的长度，几乎不存在锁定错误数据的可能性。时钟恢复电路的灵敏度可以通过在最高信号电平时间内对齐锁存功能来优化，从而最大化信噪比。

7. 发明授权

US07113587B1 Method and apparatus for non-disruptive telecommunication loop condition determination 有权
标题翻译：无中断电信环路条件确定的方法和装置
公开(公告)号：US07113587B1
公开(公告)日：2006-09-26
申请号：US09605953
申请日：2000-06-28
申请人： Jonathan H. Fischer , Donald R. Laturell , Lane A. Smith
发明人： Jonathan H. Fischer , Donald R. Laturell , Lane A. Smith
IPC分类号： H04M3/22
CPC分类号： H04M3/2272 , H04M3/14
摘要： The invention provides a low cost, simple, circuit for detecting the condition of a telephone line.
摘要翻译：本发明提供了一种用于检测电话线条件的低成本，简单的电路。

8. 发明授权

US06687371B1 Maintaining an off-hook condition during a call bridge 失效
标题翻译：在通话桥梁期间保持摘机状态
公开(公告)号：US06687371B1
公开(公告)日：2004-02-03
申请号：US09414567
申请日：1999-10-08
申请人： Jonathan H. Fischer , Donald R. Laturell , Lane A. Smith , Michael S. Toth , Michael G. Williams
发明人： Jonathan H. Fischer , Donald R. Laturell , Lane A. Smith , Michael S. Toth , Michael G. Williams
IPC分类号： H04M100
CPC分类号： H04M19/001 , Y02D70/1222
摘要： A line powered codec which adaptively allows operation with power supplied from a telephone line in many countries as conditions warrant. A startup procedure uses country-specific register settings, which are powered and maintained from a low voltage side other than the telephone line. Thus, during low line power conditions a programmed state of the line powered codec can be maintained even after a power loss in the telephone line. In another aspect, a current and voltage detection module in the line powered codec is always powered from the telephone line. If sufficient power is not present, the line powered codec does not power up. In yet another aspect, a plurality of power rails may be provided.
摘要翻译：线路供电的编解码器，根据条件，自动允许在许多国家的电话线路提供的电力进行操作。启动程序使用特定于国家的寄存器设置，它们由电话线以外的低压侧供电和维护。因此，在低功率电力条件下，甚至在电话线路中的电力损失之后也可以维持线路供电的编解码器的编程状态。在另一方面，线路供电的编解码器中的电流和电压检测模块总是由电话线供电。如果没有足够的电源，线路供电的编解码器不会上电。在另一方面，可以提供多个电源轨。

9. 发明授权

US06169762A Interface devices providing electrical isolation 失效
标题翻译：提供电气隔离的接口设备
公开(公告)号：US06169762A
公开(公告)日：2001-01-02
申请号：US08866510
申请日：1997-05-30
申请人： Milton L. Embree , Jonathan H. Fischer , Donald R. Laturell , Robert F. Lee
发明人： Milton L. Embree , Jonathan H. Fischer , Donald R. Laturell , Robert F. Lee
IPC分类号： H04B138
CPC分类号： H04L27/0002
摘要： Embodiments of the present invention are directed to interface devices that provide an interface between a first device and a second device, where the interface device provides electrical isolation between the first device and the second device, and where codec processing is distributed between the first-device side and the second-device side of the interface device. In a preferred embodiment, the second device has a transmission line, the interface device is a modem, and the electrical isolation is provided by one or more digital couplers that transmit sigma-delta signals that are coded and decoded in both the first-device-side and second-device-side circuitries of the modem.
摘要翻译：本发明的实施例涉及在第一设备和第二设备之间提供接口的接口设备，其中接口设备在第一设备和第二设备之间提供电隔离，并且其中编解码器处理分布在第一设备接口设备的侧面和第二设备侧。在优选实施例中，第二设备具有传输线，接口设备是调制解调器，并且电隔离由一个或多个数字耦合器提供，该数字耦合器发送在第一设备中的二进制编码和解码的Σ-Δ信号，调制解调器的侧面和第二设备侧电路。

10. 发明授权

US5528685A Transformerless hybrid circuit 失效
标题翻译：无变压器混合电路
公开(公告)号：US5528685A
公开(公告)日：1996-06-18
申请号：US272180
申请日：1994-07-08
申请人： Donald T. Cwynar , Donald R. Laturell
发明人： Donald T. Cwynar , Donald R. Laturell
IPC分类号： H04M1/00 , H04B1/58 , H04L27/00 , H04M1/58 , H04M11/00 , H04Q3/42 , H04M19/00
CPC分类号： H04L27/0002 , H04B1/586 , H04M1/585 , H04B1/587
摘要： An electronic hybrid useful in telephone line-powered Data Access Arrangements. The hybrid has a transmit amplifier with an output driving the base of a bipolar transistor. The emitter of the transistor is connected to a sense resistor which is, in turn, connected to one wire of a telephone line. The collector of the transistor connects to another wire of the telephone line. A summing node couples together signals on the telephone line and signals across the sense resistor such that the remaining signal on the summing node is substantially the signal received from the telephone line without the signal to be transmitted.
摘要翻译：一种电话混合器，适用于电话线供电的数据访问安排。混合器具有发射放大器，其输出驱动双极晶体管的基极。晶体管的发射极连接到检测电阻，检测电阻又连接到电话线的一根线。晶体管的集电极连接到电话线的另一根线。求和节点将电话线上的信号和检测电阻器上的信号耦合在一起，使得求和节点上的剩余信号基本上是从电话线路接收的信号，而不发送信号。

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