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公开(公告)号：US10855229B2
公开(公告)日：2020-12-01
申请号：US16429952
申请日：2019-06-03
申请人： Luxtera, Inc.
发明人： Stefan Barabas , Joseph Balardeta , Simon Pang , Scott Denton
摘要： Methods and systems for process and temperature compensation in a transimpedance amplifier using a dual replica and configurable impedances is disclosed and may include a transimpedance amplifier (TIA) circuit comprising a first TIA, a second TIA, a third TIA, and a control loop. The first TIA comprises a fixed feedback resistance and the second and third TIAs each comprise a configurable feedback impedance. The system may comprise a gain stage with inputs coupled to outputs of the first and second TIAs and with an output coupled to the configurable feedback impedance of the second and third TIAs. The circuit may be operable to configure a gain level of the first TIA based on the fixed feedback resistance and a reference current applied at an input to the first TIA, and configure a gain level of the second and third TIAs based on a control voltage generated by the gain stage.
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公开(公告)号：US20200162170A1
公开(公告)日：2020-05-21
申请号：US16594515
申请日：2019-10-07
申请人： Luxtera, Inc.
发明人： Simon Pang , Joseph Balardeta
摘要： Methods and systems for waveguide delay based equalization summing at single-ended to differential converters in optical communication are disclosed and may include: in an photonic circuit including a directional coupler, photodetectors, and a gain stage, receiving an input optical signal; splitting the input optical signal into first and second optical signals using the directional coupler; generating a first current from the first optical signal using a first photodetector; communicating the first voltage to a first input of the gain stage; generating a second current from the second optical signal using a second photodetector; communicating the second voltage to a second input of the gain stage; and generating a differential output voltage based on the first and second currents using the gain stage.
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3.发明申请公开(公告)号：US20190327036A1
公开(公告)日：2019-10-24
申请号：US16502512
申请日：2019-07-03
申请人： Luxtera, Inc.
发明人： Steffen Gloeckner , Subal Sahni , Joseph Balardeta , Simon Pang , Stefan Barabas , Scott Denton
IPC分类号： H04L1/24 , H04B10/80 , H04B10/40 , H04B10/077
摘要： Methods and systems for an optoelectronic built-in self-test (BIST) system for silicon photonics optical transceivers may include an optoelectronic transceiver having a transmit (Tx) path and a receive (Rx) path, where the Rx path includes a main Rx path and a BIST loopback path. The system may generate a pseudo-random bit sequence (PRBS) signal, generate an optical signal in the Tx path by applying the PRBS signal to a modulator, communicate the optical signal to the BIST loopback path and convert the optical signal to an electrical signal utilizing a photodetector, where the photodetector is a replica of a photodetector in the main Rx path, and assess the performance of the Tx and Rx paths by extracting a PRBS signal from the electrical signal. The transceiver may be on a single complementary-metal oxide semiconductor (CMOS) die, or on two CMOS die where a first comprises electronic devices and a second comprises optical devices.
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公开(公告)号：US10141904B2
公开(公告)日：2018-11-27
申请号：US15707309
申请日：2017-09-18
申请人： Luxtera, Inc.
发明人： Stefan Barabas , Joseph Balardeta , Simon Pang , Scott Denton
摘要： Methods and systems for accurate gain adjustment of a transimpedance amplifier using a dual replica and servo loop is disclosed and may include, in a transimpedance amplifier (TIA) circuit comprising a first TIA, a second TIA, and a third TIA, each comprising a configurable feedback impedance, and a control loop, where the control loop comprises a gain stage with inputs coupled to outputs of the first and second TIAs and an output coupled to the configurable feedback impedance of the second and third TIAs: configuring a gain level of the first TIA by configuring its feedback impedance, configuring a gain level of the third TIA by configuring a reference current applied to an input of the first TIA, and amplifying a received electrical signal to generate an output voltage utilizing the third TIA. The reference current may generate a reference voltage at one of the inputs of the gain stage.
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公开(公告)号：US20180006732A1
公开(公告)日：2018-01-04
申请号：US15636540
申请日：2017-06-28
申请人： Luxtera, Inc.
发明人： Simon Pang , Joseph Balardeta
CPC分类号： H04B10/6931 , H04B10/2504 , H04B10/691
摘要： Methods and systems for waveguide delay based equalization summing at single-ended to differential converters in optical communication are disclosed and may include: in an optoelectronic receiver including a directional coupler, photodetectors, transimpedance amplifiers (TIAs), and a gain stage, receiving an input optical signal; splitting the input optical signal into first and second optical signals using the directional coupler; generating a first current from the first optical signal using a first photodetector; generating a first voltage from the first current using a first TIA; communicating the first voltage to a first input of the gain stage; generating a second current from the second optical signal using a second photodetector; generating a second voltage from the first signal using a second TIA; communicating the second voltage to a second input of the gain stage; and generating a differential output voltage from the first and second voltages using the gain stage.
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6.发明申请Process and Temperature Compensation in TIA Using Dual Replica and Servo Loop 审中-公开使用双副本和伺服环路的TIA过程和温度补偿公开(公告)号：US20160211807A1
公开(公告)日：2016-07-21
申请号：US14997940
申请日：2016-01-18
申请人： Luxtera, Inc.
发明人： Stefan Barabas , Joseph Balardeta , Simon Pang , Scott Denton
CPC分类号： H03F1/30 , H01L31/02016 , H01L31/09 , H03F1/086 , H03F1/301 , H03F1/56 , H03F3/08 , H03F3/082 , H03F3/087 , H03F2200/129 , H03F2200/132 , H03F2200/156 , H03F2200/453 , H03G3/3084
摘要： Methods and systems for process and temperature compensation in a transimpedance amplifier using a dual replica and servo loop is disclosed and may include a transimpedance amplifier (TIA) circuit comprising a first TIA, a second TIA, a third TIA, and a control loop. The first TIA comprises a fixed feedback resistance and the second and third TIAs each comprise a configurable feedback impedance. The control loop comprises a gain stage with inputs coupled to outputs of the first and second TIAs and with an output coupled to the configurable feedback impedance of the second and third TIAs. The circuit may be operable to configure a gain level of the first TIA based on the fixed feedback resistance and a reference current applied at an input to the first TIA, and configure a gain level of the second and third TIAs based on a control voltage generated by the gain stage.
摘要翻译： 公开了使用双重复制和伺服环路的跨阻抗放大器中的处理和温度补偿的方法和系统，并且可以包括跨阻抗放大器（TIA）电路，其包括第一TIA，第二TIA，第三TIA和控制环路。 第一TIA包括固定反馈电阻，第二和第三TIA各自包括可配置的反馈阻抗。 控制回路包括增益级，其具有耦合到第一和第二TIA的输出的输入，以及耦合到第二和第三TIA的可配置反馈阻抗的输出。 电路可以用于基于固定反馈电阻和在第一TIA的输入处施加的参考电流来配置第一TIA的增益电平，并且基于产生的控制电压来配置第二和第三TIA的增益电平 在增益阶段。
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公开(公告)号：US10312866B2
公开(公告)日：2019-06-04
申请号：US14997940
申请日：2016-01-18
申请人： Luxtera, Inc.
发明人： Stefan Barabas , Joseph Balardeta , Simon Pang , Scott Denton
摘要： Methods and systems for process and temperature compensation in a transimpedance amplifier using a dual replica and servo loop is disclosed and may include a transimpedance amplifier (TIA) circuit comprising a first TIA, a second TIA, a third TIA, and a control loop. The first TIA comprises a fixed feedback resistance and the second and third TIAs each comprise a configurable feedback impedance. The control loop comprises a gain stage with inputs coupled to outputs of the first and second TIAs and with an output coupled to the configurable feedback impedance of the second and third TIAs. The circuit may be operable to configure a gain level of the first TIA based on the fixed feedback resistance and a reference current applied at an input to the first TIA, and configure a gain level of the second and third TIAs based on a control voltage generated by the gain stage.
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8.发明申请公开(公告)号：US20180356655A1
公开(公告)日：2018-12-13
申请号：US16005233
申请日：2018-06-11
申请人： Luxtera, Inc.
发明人： Brian Welch , Scott Denton , Joseph Balardeta , Simon Pang
CPC分类号： G02F1/0123 , G02F1/2252 , G02F2001/212 , H04B10/501 , H04B10/50595
摘要： Methods and systems for a distributed Mach-Zehnder Interferometer (MZI) with an integrated feed forward equalizer (FFE) may include a photonic chip comprising an optical modulator having diode drivers, local voltage domain splitters, and delay elements, where each is distributed along a length of the optical modulator. Outputs of the delay elements may be coupled to inputs of the local domain splitters, and outputs of the local voltage domain splitters may be coupled to inputs of the diode drivers. A feed forward equalization (FFE) module comprising a configurable delay element with inverted outputs coupled to one of the delay elements along the length of the modulator, may be coupled to a local voltage domain splitter. An input electrical signal may be received and delayed using the delay elements and coupled to the local domain splitters, and input electrical signals for the diode drivers may be generated using the local domain splitters.
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公开(公告)号：US20170026124A1
公开(公告)日：2017-01-26
申请号：US15286150
申请日：2016-10-05
申请人： Luxtera, Inc.
CPC分类号： H04B10/40 , H04B10/0779
摘要： Methods and systems for an optical connection service interface may include, in an optical data link comprising an optical fiber, a local control system, first and second transceivers at ends of the optical fiber, generating a control signal for the local control system at a low frequency and communicating, utilizing the optical fiber, an optical data signal at a high frequency and an optical service signal for an Optical Connection Service interface (OCSi) at an intermediate frequency. An optical signal may be modulated at the intermediate frequencies for the OCSi, and may be modulated and communicated to the second transceiver. The communicated modulated signal and the optical data signal may be detected utilizing a photodetector in the second transceiver. The detected optical signal may be demodulated, and an optical power of the optical data signal may be configured based on the demodulated signal.
摘要翻译： 用于光学连接服务接口的方法和系统可以包括在包括光纤的光学数据链路中，本地控制系统，在光纤端部的第一和第二收发器，以低的速度产生本地控制系统的控制信号 频率和通信，利用光纤，高频的光数据信号和用于中间频率的光连接服务接口（OCSi）的光服务信号。 光信号可以在OCSi的中频调制，并且可以被调制并传送到第二收发器。 可以利用第二收发器中的光电检测器来检测传送的调制信号和光数据信号。 所检测的光信号可以被解调，并且可以基于解调信号来配置光数据信号的光功率。
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公开(公告)号：US09467227B2
公开(公告)日：2016-10-11
申请号：US14657907
申请日：2015-03-13
申请人： Luxtera, Inc.
CPC分类号： H04B10/40 , H04B10/0779
摘要： Methods and systems for an optical connection service interface may include, in an optical data link comprising an optical fiber, a local control system, first and second transceivers at ends of the optical fiber, generating a control signal for the local control system at frequencies 10 kHz and an optical service signal for an Optical Connection Service interface (OCSi) at intermediate frequencies between 10 Hz and 10 kHz. An optical signal may be modulated at the intermediate frequencies for the OCSi, and may be modulated and communicated to the second transceiver. The communicated modulated signal and the optical data signal may be detected utilizing a photodetector in the second transceiver. The detected optical signal may be demodulated, and an optical power of the optical data signal may be configured based on the demodulated signal.
摘要翻译： 用于光学连接服务接口的方法和系统可以包括在包括光纤的光学数据链路中，本地控制系统，在光纤端部处的第一和第二收发器，在本地控制系统的频率下产生控制信号， 10Hz，并且在10Hz至10kHz之间的中间频率下，利用光纤传送频率> 10kHz的光学数据信号和用于光学连接服务接口（OCSi）的光学服务信号。 光信号可以在OCSi的中频调制，并且可以被调制并传送到第二收发器。 可以利用第二收发器中的光电检测器来检测传送的调制信号和光数据信号。 所检测的光信号可以被解调，并且可以基于解调信号来配置光数据信号的光功率。
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