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1.发明授权Method and apparatus for digital PABX detection and modem interface protection 失效用于数字PABX检测和调制解调器接口保护的方法和装置公开(公告)号：US06529598B1
公开(公告)日：2003-03-04
申请号：US09312178
申请日：1999-05-14
IPC分类号： H04M1100
CPC分类号： H04M11/06
摘要： The line interface circuit of a modem to be connected to a standard RJ11 jack of a digital PBX (Private Branch Exchange) is used along with software routines resident in the modem to detect the presence of a PBX connected to the modem. Upon going off-hook, the modem, by the software routines, determines whether the connection will harm the interface by one of several software routines. If it appears that the interface circuit may be damaged because a PBX line is present, the modem is instructed to go on-hook (hang up), or if the connection is not harmful to the interface, alerts the user that the modem is connected to a wrong jack.
摘要翻译： 要连接到数字PBX（专用交换机）的标准RJ11插孔的调制解调器的线路接口电路与驻留在调制解调器中的软件例程一起使用，以检测连接到调制解调器的集团电话的存在。 摘机时，调制解调器通过软件程序确定连接是否会通过几个软件例程之一对接口造成伤害。 如果看起来接口电路可能因为PBX线路而被损坏，则指示调制解调器进行挂机（挂断），或者如果连接对接口无害，则向用户通知调制解调器已连接 一个错误的杰克。
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公开(公告)号：US20130141829A1
公开(公告)日：2013-06-06
申请号：US13625641
申请日：2012-09-24
IPC分类号： H02H9/02
CPC分类号： H02H9/02 , G06F1/266 , G06F2213/0042
摘要： An apparatus for detecting and controlling current. A current detector for generating a first value that represents an amount of current being delivered to a device. A current limit circuit for generating a second value that represents a maximum permitted current level from a current source. A current controller for controlling the amount of current drawn by the device if the first value exceeds the second value.
摘要翻译： 一种用于检测和控制电流的装置。 一种电流检测器，用于产生表示传送到设备的电流量的第一值。 一个用于产生表示来自当前源的最大允许电流电平的第二值的电流限制电路。 一种电流控制器，用于如果所述第一值超过所述第二值，则控制由所述装置吸取的电流量。
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公开(公告)号：US08274772B2
公开(公告)日：2012-09-25
申请号：US12341753
申请日：2008-12-22
CPC分类号： H02H9/02 , G06F1/266 , G06F2213/0042
摘要： An apparatus for detecting and controlling current. A current detector for generating a first value that represents an amount of current being delivered to a device. A current limit circuit for generating a second value that represents a maximum permitted current level from a current source. A current controller for controlling the amount of current drawn by the device if the first value exceeds the second value.
摘要翻译： 一种用于检测和控制电流的装置。 一种电流检测器，用于产生表示传送到设备的电流量的第一值。 一个用于产生表示来自当前源的最大允许电流电平的第二值的电流限制电路。 一种电流控制器，用于如果所述第一值超过所述第二值，则控制由所述装置吸取的电流量。
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公开(公告)号：US06519339B1
公开(公告)日：2003-02-11
申请号：US09534673
申请日：2000-03-24
IPC分类号： H04M100
摘要： An efficient method and circuitry for transferring various levels of power across a high voltage isolation barrier. In one embodiment of the invention, a data access arrangement (DAA) is provided with system side circuitry that provides power to line side circuitry via the high voltage isolation barrier. The line side circuitry includes voltage measurement circuitry, such as an analog-to-digital converter, that periodically measures the line side supply voltage. The resultant information is transmitted across the high voltage isolation barrier to the system side circuitry, where control circuitry or a software process compares the digital representation of the measured voltage level to a predetermined value. Based on the results of this comparison, the control circuitry may alter the amount of power transferred across the high voltage isolation barrier to the line side circuitry in order to optimize power transfer efficiency. In one embodiment of the invention, a regulator is provided in series between an isolation transformer and the line side circuitry for purposes of regulating the supply voltage provided to the line side circuitry. The analog-to-digital converter of the line side circuitry may be configured to measure either the regulated or unregulated supply voltage, with corresponding modifications to a power management process. Further, the amount of power transferred across the isolation transformer may be varied in accordance with the invention by varying the frequency and/or duty cycle of differential transformer driver signals. In an alternate embodiment of the invention, a single-ended pulse is applied to the primary side of the transformer to effectuate power transfer.
摘要翻译： 一种有效的方法和电路，用于通过高压隔离屏障传输各种电平的功率。 在本发明的一个实施例中，数据访问装置（DAA）被提供有系统侧电路，其通过高电压隔离屏障向线路侧电路提供电力。 线路侧电路包括周期性地测量线路侧电源电压的电压测量电路，例如模数转换器。 所得到的信息通过高压隔离屏障传输到系统侧电路，其中控制电路或软件过程将测量的电压电平的数字表示与预定值进行比较。 基于该比较的结果，控制电路可以改变跨越线路侧电路的高电压隔离屏障传递的功率量，以便优化功率传输效率。 在本发明的一个实施例中，为了调节提供给线路侧电路的电源电压，调节器串联提供在隔离变压器和线路侧电路之间。 线路侧电路的模拟 - 数字转换器可以被配置为测量受调节或不稳定的电源电压，并对功率管理过程进行相应的修改。 此外，通过改变差分变压器驱动器信号的频率和/或占空比，可以根据本发明改变隔离变压器两端传递的功率量。 在本发明的替代实施例中，单端脉冲被施加到变压器的初级侧以实现功率传递。
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公开(公告)号：US20130034237A1
公开(公告)日：2013-02-07
申请号：US13560290
申请日：2012-07-27
申请人： Sverrir Olafsson , Jonathan Chien , Lorenzo Crespi , Trausti Thormundsson , James Bunde Villadsen Skov , Andrew B. Webster , Eitan David
发明人： Sverrir Olafsson , Jonathan Chien , Lorenzo Crespi , Trausti Thormundsson , James Bunde Villadsen Skov , Andrew B. Webster , Eitan David
CPC分类号： H04R1/406 , H04R1/10 , H04R1/1083
摘要： A system for improved audio in a headset comprising a first headset microphone generating a first signal. A second headset microphone generating a second signal. A multiplexer coupled to the first headset microphone and the second headset microphone for multiplexing the first signal and the second signal. A power extractor for extracting power for use by one or more of the multiplexer, the first headset microphone and the second headset microphone. A demultiplexer for extracting the first signal and the second signal. A signal processor for generating a noise reduced microphone signal. An audio subsystem for receiving the noise reduced microphone signal and for generating speaker signals for a first headphone speaker and a second headphone speaker.
摘要翻译： 一种用于改善耳机中的音频的系统，包括产生第一信号的第一耳机麦克风。 产生第二信号的第二耳机麦克风。 耦合到第一耳机麦克风的多路复用器和用于复用第一信号和第二信号的第二耳机麦克风。 一种功率提取器，用于提取由多路复用器，第一耳机麦克风和第二耳机麦克风中的一个或多个使用的功率。 一种解复用器，用于提取第一信号和第二信号。 一种用于产生噪声降低的麦克风信号的信号处理器。 用于接收噪声降低的麦克风信号并用于产生第一耳机扬声器和第二耳机扬声器的扬声器信号的音频子系统。
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6.发明授权Telephone line interface circuit with intelligent line current and voltage control 有权电话线接口电路，具有智能线路电流和电压控制公开(公告)号：US06731749B1
公开(公告)日：2004-05-04
申请号：US09312412
申请日：1999-05-14
IPC分类号： H04M704
CPC分类号： H04M3/005
摘要： A telephone line interface circuit is disclosed having intelligent line current control that can adjust to the various requirements of worldwide telephone systems (DC masks), and/or can reduce the power consumed by the interface circuit. A controller reads a voltage value and based on the theoretical model of a telephone line network, and the expected current/voltage characteristic, as dictated by the appropriate DC mask. The controller sets the line current (via an output voltage) to an optimum value and causes the line voltage to adjust so as to comply with the DC mask and/or minimize power dissipation in the circuit.
摘要翻译： 公开了一种电话线路接口电路，其具有可以适应全球电话系统（DC掩模）的各种要求的智能线路电流控制和/或可以降低接口电路消耗的功率。 控制器读取电压值，并根据电话线网络的理论模型以及由适当的DC掩模所指示的预期电流/电压特性来读取电压值。 控制器将线路电流（经由输出电压）设置为最佳值，并且使得线路电压被调整以符合DC掩模和/或最小化电路中的功率消耗。
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