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1. 发明申请

US20130038920A1 PULSE-WIDTH-MODULATED THERMAL TUNING OF OPTICAL DEVICES 有权
标题翻译：光学器件的脉冲宽度调制热调制
公开(公告)号：US20130038920A1
公开(公告)日：2013-02-14
申请号：US13205749
申请日：2011-08-09
申请人： Frankie Y. Liu , Dinesh D. Patil , Ronald Ho , Ashok V. Krishnamoorthy
发明人： Frankie Y. Liu , Dinesh D. Patil , Ronald Ho , Ashok V. Krishnamoorthy
IPC分类号： G02F1/01
CPC分类号： G02F1/3132 , G02F1/0147 , G02F1/025
摘要： An optical device that includes a wavelength-sensitive optical component, which has an associated thermal time constant, is described. Note that an operating wavelength of the wavelength-sensitive optical component is a function of several physical parameters including temperature. Moreover, the optical device includes a heating mechanism that provides heat to the wavelength-sensitive optical component. Furthermore, the optical device includes a driver circuit that provides a pulse-width modulated signal to the heating mechanism. Note that an average pulse-width modulated heat provided by the heating mechanism, and which corresponds to the pulse-width modulated signal, thermally tunes the wavelength-sensitive optical component to a target operating wavelength. Additionally, note that the target operating wavelength corresponds to a target operating temperature of the wavelength-sensitive optical component.
摘要翻译：描述了包括具有相关联的热时间常数的波长敏感光学部件的光学装置。注意，波长敏感光学部件的工作波长是包括温度在内的若干物理参数的函数。此外，光学装置包括向波长敏感的光学部件提供热量的加热机构。此外，光学装置包括向加热机构提供脉宽调制信号的驱动电路。注意，由加热机构提供的并且对应于脉冲宽度调制信号的平均脉冲宽度调制热量将波长敏感光学部件热调谐到目标工作波长。此外，注意，目标工作波长对应于波长敏感光学部件的目标工作温度。

2. 发明申请

US20120315052A1 INPUT ISOLATION OF A TRANSIMPEDANCE AMPLIFIER IN OPTICAL RECEIVERS 有权
标题翻译：光接收机中的放大放大器的输入隔离
公开(公告)号：US20120315052A1
公开(公告)日：2012-12-13
申请号：US13157165
申请日：2011-06-09
申请人： Frankie Y. Liu , Dinesh D. Patil
发明人： Frankie Y. Liu , Dinesh D. Patil
IPC分类号： H04B10/06
CPC分类号： H04B10/695 , H04B10/693
摘要： An optical receiver is described. This optical receiver has two operating modes: a calibration mode and a normal mode. During the normal mode, switches are used to electrically couple an input of a transimpedance amplifier (TIA) to an optical-to-electrical (OE) converter that receives an optical signal and provides a corresponding analog electrical signal. Moreover, during the calibration mode, the switches are used to electrically isolate the input of the TIA from the OE converter while maintaining a feedback path from an output of the TIA to the input of the TIA, thereby ensuring proper bias of the TIA during calibration. Furthermore, a frequency response of the TIA during the normal mode is substantially unchanged over an operating bandwidth of the TIA by the capability to electrically isolate the input of the TIA from the OE converter during the calibration mode.
摘要翻译：描述了光接收机。该光接收机具有两种工作模式：校准模式和正常模式。在正常模式期间，开关用于将跨阻放大器（TIA）的输入电耦合到接收光信号并提供相应的模拟电信号的光电转换器（OE）。此外，在校准模式期间，开关用于将TIA的输入与OE转换器电隔离，同时保持从TIA的输出到TIA的输入的反馈路径，从而确保在校准期间TIA的适当偏置。此外，在正常模式期间，通过在校准模式期间将TIA的输入与OE转换器电隔离的能力，在正常模式期间TIA的频率响应在TIA的工作带宽上基本不变。

3. 发明授权

US08155538B2 Technique for calibrating and centering an optical receiver 有权
标题翻译：光接收机校准和定中心的技术
公开(公告)号：US08155538B2
公开(公告)日：2012-04-10
申请号：US12633940
申请日：2009-12-09
申请人： Philip Amberg , Dinesh D. Patil , Frankie Y. Liu
发明人： Philip Amberg , Dinesh D. Patil , Frankie Y. Liu
IPC分类号： H04B10/06
CPC分类号： H04B10/69
摘要： A technique for calibrating an optical receiver is described. During this technique, a front-end circuit in the optical receiver receives an optical signal that corresponds to a sequence with alternating groups of symbol types that correspond to binary values, where durations of the groups of a given symbol type, which can correspond to a first binary value or a second binary value, progressively decrease during the sequence. Then, the output of the feedback circuit is adjusted based at least on the sequence. When the durations of groups corresponding to the first binary value and the second binary value reach their minimum values in the sequence, a calibration value corresponding to the output of the feedback circuit is stored for use during a normal operating mode of the optical receiver.
摘要翻译：描述了用于校准光接收机的技术。在该技术期间，光接收机中的前端电路接收对应于具有对应于二进制值的符号类型的交替组的序列的光信号，其中给定符号类型的组的持续时间可对应于第一个二进制值或第二个二进制值在序列中逐渐减少。然后，至少基于序列来调整反馈电路的输出。当对应于第一二进制值和第二二进制值的组的持续时间达到其序列中的最小值时，存储对应于反馈电路的输出的校准值，以在光接收机的正常操作模式期间使用。

4. 发明授权

US07694203B2 On-chip samplers for asynchronously triggered events 有权
标题翻译：用于异步触发事件的片上采样器
公开(公告)号：US07694203B2
公开(公告)日：2010-04-06
申请号：US11773020
申请日：2007-07-03
申请人： Frankie Y. Liu , Ronald Ho , Robert J. Drost
发明人： Frankie Y. Liu , Ronald Ho , Robert J. Drost
IPC分类号： G01R31/28
CPC分类号： G01R31/31705 , G01R19/0053 , G01R31/2884
摘要： Embodiments of an integrated circuit that includes a debug circuit are described. This debug circuit is configured to test an asynchronous circuit by performing analog measurements on asynchronous signals associated with the asynchronous circuit, and includes a triggering module configured to gate the debug circuit based on one or more of the asynchronous signals. This triggering module has a continuous mode of operation and a single-shot mode of operation. A timing module within the debug circuit has a timing range exceeding a pre-determined value, and is configured to provide signals corresponding to a first time base or signals corresponding to a second time base. Furthermore, control logic within the debug circuit is configured to select a mode of operation and a given time base for the debug circuit, which is either the first time base or the second time base.
摘要翻译：描述包括调试电路的集成电路的实施例。该调试电路被配置为通过对与异步电路相关联的异步信号执行模拟测量来测试异步电路，并且包括被配置为基于一个或多个异步信号门控调试电路的触发模块。该触发模块具有连续的操作模式和单次操作模式。调试电路内的定时模块具有超过预定值的定时范围，并且被配置为提供对应于第一时基的信号或对应于第二时基的信号。此外，调试电路内的控制逻辑被配置为选择作为第一时基或第二时基的调试电路的操作模式和给定时基。

5. 发明授权

US07279922B1 Sub-sampling of weakly-driven nodes 有权
标题翻译：弱驱动节点的子采样
公开(公告)号：US07279922B1
公开(公告)日：2007-10-09
申请号：US11477050
申请日：2006-06-28
申请人： Ronald Ho , Thomas G. O'Neill , Robert D. Hopkins , Frankie Y. Liu
发明人： Ronald Ho , Thomas G. O'Neill , Robert D. Hopkins , Frankie Y. Liu
IPC分类号： G01R31/26
CPC分类号： G01R31/3004
摘要： A method and apparatus for performing on-chip voltage sampling of a weakly-driven node of a semiconductor device are disclosed. In some embodiments, the node is a floating node or is capacitively-driven. In some embodiments, it is involved in proximity-based communication. Sampling the node may include isolating the signal to be sampled using a source-follower amplifier before passing it to the sampling circuit. Sampling the node may include biasing the node to a desired voltage using a leaky transistor or other biasing circuit. In some embodiments, the biasing circuit may also be used to calibrate the sampler by coupling one or more calibration voltages to the node in place of a biasing voltage and measuring the sampler output. The sampler may be suitable for sub-sampling high frequency signals to produce a time-expanded, lower frequency version of the signals. The output of the sampler may be a current communicated off-chip for testing.
摘要翻译：公开了一种用于对半导体器件的弱驱动节点执行片上电压采样的方法和装置。在一些实施例中，节点是浮动节点或者是电容驱动的。在一些实施例中，其涉及基于邻近的通信。对节点进行采样可以包括在将其传送到采样电路之前使用源跟随放大器来隔离要采样的信号。采样节点可以包括使用泄漏晶体管或其它偏置电路将节点偏置到期望的电压。在一些实施例中，偏置电路还可以用于通过将一个或多个校准电压耦合到节点来代替偏置电压并测量采样器输出来校准采样器。采样器可能适用于对高频信号进行子采样，以产生时间扩展的低频版本的信号。采样器的输出可以是用于测试的芯片外的当前通信。

6. 发明授权

US08599468B2 Pulse-width-modulated thermal tuning of optical devices 有权
标题翻译：光器件的脉冲宽度调制热调谐
公开(公告)号：US08599468B2
公开(公告)日：2013-12-03
申请号：US13205749
申请日：2011-08-09
申请人： Frankie Y. Liu , Dinesh D. Patil , Ronald Ho , Ashok V. Krishnamoorthy
发明人： Frankie Y. Liu , Dinesh D. Patil , Ronald Ho , Ashok V. Krishnamoorthy
IPC分类号： G02F1/01
CPC分类号： G02F1/3132 , G02F1/0147 , G02F1/025
摘要： An optical device that includes a wavelength-sensitive optical component, which has an associated thermal time constant, is described. Note that an operating wavelength of the wavelength-sensitive optical component is a function of several physical parameters including temperature. Moreover, the optical device includes a heating mechanism that provides heat to the wavelength-sensitive optical component. Furthermore, the optical device includes a driver circuit that provides a pulse-width modulated signal to the heating mechanism. Note that an average pulse-width modulated heat provided by the heating mechanism, and which corresponds to the pulse-width modulated signal, thermally tunes the wavelength-sensitive optical component to a target operating wavelength. Additionally, note that the target operating wavelength corresponds to a target operating temperature of the wavelength-sensitive optical component.
摘要翻译：描述了包括具有相关联的热时间常数的波长敏感光学部件的光学装置。注意，波长敏感光学部件的工作波长是包括温度在内的若干物理参数的函数。此外，光学装置包括向波长敏感的光学部件提供热量的加热机构。此外，光学装置包括向加热机构提供脉宽调制信号的驱动电路。注意，由加热机构提供的并且对应于脉冲宽度调制信号的平均脉冲宽度调制热量将波长敏感光学部件热调谐到目标工作波长。此外，注意，目标工作波长对应于波长敏感光学部件的目标工作温度。

7. 发明申请

US20110135315A1 OPTICAL RECEIVER WITH A CALIBRATION MODE 有权
标题翻译：具有校准模式的光接收器
公开(公告)号：US20110135315A1
公开(公告)日：2011-06-09
申请号：US12633934
申请日：2009-12-09
申请人： Frankie Y. Liu , Dinesh D. Patil , Ronald Ho , Elad Alon
发明人： Frankie Y. Liu , Dinesh D. Patil , Ronald Ho , Elad Alon
IPC分类号： H04B10/00 , H04B10/06
CPC分类号： H04B10/6911
摘要： An optical receiver is described. This optical receiver includes a digital feedback circuit that biases a front-end circuit, which receives an optical signal, so that an analog electrical signal output by the front-end circuit is calibrated relative to a reference voltage corresponding to a decision threshold of a digital slicer in the optical receiver. In particular, during a calibration mode the feedback circuit may determine and store a calibration value that calibrates the analog electrical signal relative to the reference voltage. Then, during a normal operating mode, the feedback circuit may output a current corresponding to the stored calibration value that specifies a bias point of the front-end circuit.
摘要翻译：描述了光接收机。该光接收器包括数字反馈电路，该数字反馈电路偏置接收光信号的前端电路，使得由前端电路输出的模拟电信号相对于对应于数字的判定阈值的参考电压进行校准切片机在光接收机。特别地，在校准模式期间，反馈电路可以确定并存储校准相对于参考电压的模拟电信号的校准值。然后，在正常操作模式期间，反馈电路可输出对应于存储的校准值的电流，该校准值指定前端电路的偏置点。

8. 发明申请

US20080231308A1 Sub-Sampling of Weakly-Driven Nodes 有权
标题翻译：弱驱动节点的子抽样
公开(公告)号：US20080231308A1
公开(公告)日：2008-09-25
申请号：US11859463
申请日：2007-09-21
申请人： Ronald Ho , Thomas G. O'Neill , Robert D. Hopkins , Frankie Y. Liu
发明人： Ronald Ho , Thomas G. O'Neill , Robert D. Hopkins , Frankie Y. Liu
IPC分类号： G01R31/26
CPC分类号： G01R31/3004
摘要： A method and apparatus for performing on-chip voltage sampling of a weakly-driven node of a semiconductor device are disclosed. In some embodiments, the node is a floating node or is capacitively-driven. In some embodiments, it is involved in proximity-based communication. Sampling the node may include isolating the signal to be sampled using a source-follower amplifier before passing it to the sampling circuit. Sampling the node may include biasing the node to a desired voltage using a leaky transistor or other biasing circuit. In some embodiments, the biasing circuit may also be used to calibrate the sampler by coupling one or more calibration voltages to the node in place of a biasing voltage and measuring the sampler output. The sampler may be suitable for sub-sampling high frequency signals to produce a time-expanded, lower frequency version of the signals. The output of the sampler may be a current communicated off-chip for testing.
摘要翻译：公开了一种用于对半导体器件的弱驱动节点执行片上电压采样的方法和装置。在一些实施例中，节点是浮动节点或者是电容驱动的。在一些实施例中，其涉及基于邻近的通信。对节点进行采样可以包括在将其传送到采样电路之前使用源跟随放大器来隔离要采样的信号。采样节点可以包括使用泄漏晶体管或其它偏置电路将节点偏置到期望的电压。在一些实施例中，偏置电路还可以用于通过将一个或多个校准电压耦合到节点来代替偏置电压并测量采样器输出来校准采样器。采样器可能适用于对高频信号进行子采样，以产生时间扩展的低频版本的信号。采样器的输出可以是用于测试的芯片外的当前通信。

9. 发明授权

US08582985B2 Input isolation of a transimpedance amplifier in optical receivers 有权
标题翻译：输入隔离光接收器中的跨阻放大器
公开(公告)号：US08582985B2
公开(公告)日：2013-11-12
申请号：US13157165
申请日：2011-06-09
申请人： Frankie Y. Liu , Dinesh D. Patil
发明人： Frankie Y. Liu , Dinesh D. Patil
IPC分类号： H04B10/06 , H04B10/69
CPC分类号： H04B10/695 , H04B10/693
摘要： An optical receiver is described. This optical receiver has two operating modes: a calibration mode and a normal mode. During the normal mode, switches are used to electrically couple an input of a transimpedance amplifier (TIA) to an optical-to-electrical (OE) converter that receives an optical signal and provides a corresponding analog electrical signal. Moreover, during the calibration mode, the switches are used to electrically isolate the input of the TIA from the OE converter while maintaining a feedback path from an output of the TIA to the input of the TIA, thereby ensuring proper bias of the TIA during calibration. Furthermore, a frequency response of the TIA during the normal mode is substantially unchanged over an operating bandwidth of the TIA by the capability to electrically isolate the input of the TIA from the OE converter during the calibration mode.
摘要翻译：描述了光接收机。该光接收机具有两种工作模式：校准模式和正常模式。在正常模式期间，开关用于将跨阻放大器（TIA）的输入电耦合到接收光信号并提供相应的模拟电信号的光电转换器（OE）。此外，在校准模式期间，开关用于将TIA的输入与OE转换器电隔离，同时保持从TIA的输出到TIA的输入的反馈路径，从而确保在校准期间TIA的适当偏置。此外，在正常模式期间，通过在校准模式期间将TIA的输入与OE转换器电隔离的能力，在正常模式期间TIA的频率响应在TIA的工作带宽上基本不变。

10. 发明授权

US08238761B2 Optical receiver with a calibration mode 有权
标题翻译：具有校准模式的光接收机
公开(公告)号：US08238761B2
公开(公告)日：2012-08-07
申请号：US12633934
申请日：2009-12-09
申请人： Frankie Y. Liu , Dinesh D. Patil , Ronald Ho , Elad Alon
发明人： Frankie Y. Liu , Dinesh D. Patil , Ronald Ho , Elad Alon
IPC分类号： H04B10/06
CPC分类号： H04B10/6911
摘要： An optical receiver is described. This optical receiver includes a digital feedback circuit that biases a front-end circuit, which receives an optical signal, so that an analog electrical signal output by the front-end circuit is calibrated relative to a reference voltage corresponding to a decision threshold of a digital slicer in the optical receiver. In particular, during a calibration mode the feedback circuit may determine and store a calibration value that calibrates the analog electrical signal relative to the reference voltage. Then, during a normal operating mode, the feedback circuit may output a current corresponding to the stored calibration value that specifies a bias point of the front-end circuit.
摘要翻译：描述了光接收机。该光接收器包括数字反馈电路，该数字反馈电路偏置接收光信号的前端电路，使得由前端电路输出的模拟电信号相对于对应于数字的判定阈值的参考电压进行校准切片机在光接收机。特别地，在校准模式期间，反馈电路可以确定并存储校准相对于参考电压的模拟电信号的校准值。然后，在正常操作模式期间，反馈电路可输出对应于存储的校准值的电流，该校准值指定前端电路的偏置点。

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