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公开(公告)号：US11349576B2
公开(公告)日：2022-05-31
申请号：US17167879
申请日：2021-02-04
申请人： ADTRAN, Inc.
发明人： Daniel M. Joffe , Vern Brethour
摘要： A coupling module can be used to communicate high speed signals between an optical transceiver and a processing module of an optical communication device, such as an optical line termination (OLT) or an optical network unit (ONU). The coupling module can adjust the common mode voltage level of a differential signal output by the optical transceiver to the common mode voltage level required by the processing module. In addition, the coupling module splits each of the differential output signals from the optical transceiver and passes the split signals to both a high-pass filter and a low-pass filter that are connected in parallel. An adapter module can be connected to the coupling module such that the coupling module can receive different differential signals from different optical transceivers.
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公开(公告)号：US10944599B2
公开(公告)日：2021-03-09
申请号：US16457071
申请日：2019-06-28
申请人： ADTRAN, INC.
发明人： Daniel M. Joffe , Vern Brethour
摘要： A coupling module can be used to communicate high speed signals between an optical transceiver and a processing module of an optical communication device, such as an optical line termination (OLT) or an optical network unit (ONU). The coupling module can adjust the common mode voltage level of a differential signal output by the optical transceiver to the common mode voltage level required by the processing module. In addition, the coupling module splits each of the differential output signals from the optical transceiver and passes the split signals to both a high-pass filter and a low-pass filter that are connected in parallel. The outputs of the high-pass filter and the low-pass filter from different paths of the differential signal are cross-coupled and combined to provide a differential signal to the processing module.
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公开(公告)号：US10243530B1
公开(公告)日：2019-03-26
申请号：US15582620
申请日：2017-04-29
申请人： ADTRAN, INC.
发明人： Daniel M. Joffe
摘要： An attenuation circuit with stages having constant dB steps between stages is provided. The attenuation circuit can be configured as a ladder network using resistors having three different values. A first resistor can be connected between the last stage of the attenuation circuit and ground and have a first predetermined resistance. One or more second resistors can be connected in each stage and have a second predetermined resistance based on the first predetermined resistance and the dB step between stages. One or more third resistors can be connected in parallel to the first resistor for the remaining stages and have a third predetermined resistance based on the first predetermined resistance and the dB step between stages.
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公开(公告)号：US20230244289A1
公开(公告)日：2023-08-03
申请号：US17591056
申请日：2022-02-02
申请人： ADTRAN, Inc.
摘要： A configurable connector is provided for a communication device, such as a gateway, that is located outdoors. The connector can engage with a corresponding interface of the gateway to provide communication signals and power signals to the communication device. The connector can be configured to select the power type provided to the communication device via the connector. The connector can have a first configuration to provide a first power type to the communication device or a second configuration to provide a second power type to the communication device. In the first configuration of the connector, power terminals of the connector can be connected directly to corresponding power wires providing the first power type. In the second configuration, the power terminals of the connector can be connected by jumpers to supplemental terminals in the connector that receive the second power type from the communication device.
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公开(公告)号：US20200136350A1
公开(公告)日：2020-04-30
申请号：US16170125
申请日：2018-10-25
申请人： ADTRAN, Inc.
发明人： Daniel M. Joffe , Leif Sandstrom
IPC分类号： H01S5/0683 , H01S5/00 , H01S5/06 , H01S5/10 , H04B10/516
摘要： An optical transmission system includes a laser module generating a modulated optical waveform, including both amplitude and frequency modulation, at center frequencies corresponding to different operating temperatures; and an optical shaping filter, with passbands corresponding to the different center frequencies, that converts at least part of the frequency modulation to additional amplitude modulation. The optical transmission system is tuned by: determining a range of temperatures at which the laser module center frequencies are within a passband of the optical shaping filter; setting the laser module to a temperature, within the range of temperatures, at which the modulated optical waveform is within the passband; measuring an average output power of the optical shaping filter; and adjusting the temperature of the laser module to a target temperature, within the range of temperatures, at which an output condition is achieved, based on the average output power and/or extinction ratio of the filtered waveform.
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公开(公告)号：US10148464B1
公开(公告)日：2018-12-04
申请号：US15269619
申请日：2016-09-19
申请人： ADTRAN, INC.
发明人： Daniel M. Joffe
IPC分类号： H04L25/03 , H04B10/564 , H04B10/50 , H04B10/80
摘要： A driver circuit for an optical transmitter includes a main path in parallel with an inverting path. The data signals from the main path and the inverting path can be combined to generate an output signal for a laser diode. The main path can communicate a data signal via a first transmission line and the inverting path can communicate an inverted data signal via a second transmission line. The second transmission line can be longer than the first transmission line in order to delay the inverted data signal. In addition, the inverted data signal can be weighted before being combined with the data signal from the main path.
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公开(公告)号：US09362959B2
公开(公告)日：2016-06-07
申请号：US14270047
申请日：2014-05-05
申请人： Adtran Inc.
CPC分类号： H04B1/0057 , H04B3/32 , H04L5/08 , H04M11/062
摘要： A device is suggested comprising a first DSL system operating in a first frequency band, a second DSL system operating in a second frequency band and a filter unit connected to a line and to each of the first DSL system and the second DSL system.
摘要翻译： 提出了一种设备，其包括在第一频带中操作的第一DSL系统，在第二频带中操作的第二DSL系统和连接到线路以及连接到第一DSL系统和第二DSL系统中的每一个的滤波器单元。
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公开(公告)号：US10797467B2
公开(公告)日：2020-10-06
申请号：US16170125
申请日：2018-10-25
申请人： ADTRAN, Inc.
发明人： Daniel M. Joffe , Leif Sandstrom
IPC分类号： H01S5/0683 , H01S5/00 , H04B10/516 , H01S5/10 , H01S5/06
摘要： An optical transmission system includes a laser module generating a modulated optical waveform, including both amplitude and frequency modulation, at center frequencies corresponding to different operating temperatures; and an optical shaping filter, with passbands corresponding to the different center frequencies, that converts at least part of the frequency modulation to additional amplitude modulation. The optical transmission system is tuned by: determining a range of temperatures at which the laser module center frequencies are within a passband of the optical shaping filter; setting the laser module to a temperature, within the range of temperatures, at which the modulated optical waveform is within the passband; measuring an average output power of the optical shaping filter; and adjusting the temperature of the laser module to a target temperature, within the range of temperatures, at which an output condition is achieved, based on the average output power and/or extinction ratio of the filtered waveform.
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公开(公告)号：US10079645B2
公开(公告)日：2018-09-18
申请号：US15383175
申请日：2016-12-19
申请人： Adtran, Inc.
发明人： Daniel M. Joffe
IPC分类号： H04B10/69 , H04B10/67 , H03F3/04 , H04B10/079 , H04B10/27 , H04L25/03 , H04B10/272
CPC分类号： H04B10/673 , H03F3/04 , H03F2200/129 , H04B10/07953 , H04B10/27 , H04B10/272 , H04B10/69 , H04L25/03057 , H05K999/99
摘要： Optical telecommunications devices, systems, and methods. In some implementations, an optical networking unit (ONU) includes a multi-rate receiver having an operating bandwidth that is selected operationally based on physical layer characteristics of received signals and information received from a MAC. The ONU can also include an upstream laser circuit having an output impedance that differs from a characteristic impedance of a system in which the laser circuit is implemented. The ONU can also include a decision feedback equalizer (DFE) having at least one tap weight that is fixed to facilitate convergence of the DFE when signals received by the DFE would otherwise fail to meet characteristics required for DFE convergence.
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公开(公告)号：US11641180B2
公开(公告)日：2023-05-02
申请号：US17337335
申请日：2021-06-02
申请人： ADTRAN, Inc.
发明人： Daniel M. Joffe
摘要： A distribution amplifier for a communication device such as a gateway is provided. The distribution amplifier can receive an input signal and provide multiple output signals. The distribution amplifier can have a transmission line that receives the input signal and multiple amplifier stages that are connected to the transmission line to receive the input signal. The output of the amplifier stages correspond to the output signals from the distribution amplifier. The transmission line has equally spaced connection points for the amplifier stages. The transmission line can be designed to have an impedance that results in the impedance of the transmission line with the connected amplifier stages having a final impedance that matches the input impedance to the transmission line.
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