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1. 发明授权

US11233523B1 Digital-to-analog conversion with sign modulation 有权
公开(公告)号：US11233523B1
公开(公告)日：2022-01-25
申请号：US17158373
申请日：2021-01-26
申请人： Shahab Oveis Gharan , Ian Roberts , Yuriy Greshishchev , Naim Ben-Hamida , Kim B. Roberts
发明人： Shahab Oveis Gharan , Ian Roberts , Yuriy Greshishchev , Naim Ben-Hamida , Kim B. Roberts
IPC分类号： H03M1/66 , H03M1/82
摘要： An apparatus is configured to generate, from a stream of periodic digital samples, a first sub-stream of periodic analog samples and a second sub-stream of periodic analog samples, each sub-stream comprising substantially stable time intervals. The apparatus is further configured to generate a sign-modulated sub-stream by applying to the second sub-stream a sign modulation operation effecting a sign transition during a stable time interval of the second sub-stream. The apparatus is further configured to generate an output stream of periodic analog samples based on a sum of the first sub-stream and the sign-modulated sub-stream, wherein a period of the output stream is shorter than periods of the first and second sub-streams.

2. 发明授权

US10374623B1 Digital-to-analog converter and generation of high-bandwidth analog signals 有权
公开(公告)号：US10374623B1
公开(公告)日：2019-08-06
申请号：US16004673
申请日：2018-06-11
申请人： Shahab Oveis Gharan , Yuriy Greshishchev , Naim Ben-Hamida , Kim B. Roberts
发明人： Shahab Oveis Gharan , Yuriy Greshishchev , Naim Ben-Hamida , Kim B. Roberts
IPC分类号： H04B10/532 , H03M1/08 , H04Q11/00
摘要： A controlled switch having N inputs and a single output (N≥2) is switchable between N states. In each state a respective one of the inputs is connected to the single output. There are N sources of sub-streams of analog samples, each sub-stream composed of pairs of adjacent analog samples. Each source is coupled to a respective one of the inputs. In operation, the controlled switch is controlled by a control signal to switch between the N states. While the controlled switch is in any one of the states, a data transition occurs between two adjacent analog samples in the sub-stream whose source is coupled to the input that is connected to the single output. The single output yields the high-bandwidth analog signal. Any pair of adjacent analog samples in any one of the sub-streams substantially determines a corresponding pair of adjacent analog samples in the high-bandwidth analog signal.

3. 发明授权

US08761614B2 Parallel conversion between optical and digital 有权
标题翻译：光学和数字之间的并行转换
公开(公告)号：US08761614B2
公开(公告)日：2014-06-24
申请号：US13159871
申请日：2011-06-14
申请人： Yuriy Greshishchev , Ian Betty , Kim B. Roberts
发明人： Yuriy Greshishchev , Ian Betty , Kim B. Roberts
IPC分类号： H04B10/06
CPC分类号： H04B10/61
摘要： A coherent optical receiver Includes an electro-optic module coupled to an electronic signal processing Integrated circuit (IC) via a parallel analog transmission line bus. The electro-optic module receives and detects an optical channel light including a high-bandwidth signal modulated thereon. The electro-optic module includes: a single optical hybrid for mixing the optical channel light with a corresponding continuous wave local oscillator light to generate a mixed light containing the high-bandwidth data signal, at least one photodetector; and an analog frequency decimator for generating a set of parallel analog signals, each analog signal representing a respective portion of the high-bandwidth signal. The electronic signal processing IC includes a respective Analog-to-digital (A/D) converter for sampling each one of the set of parallel analog signals, and for generating corresponding parallel digital sample streams; and a digital signal processor (DSP) for processing the parallel digital sample streams to extract the high-bandwidth signal.
摘要翻译：相干光接收器包括通过并行模拟传输线总线耦合到电子信号处理集成电路（IC）的电光模块。电光模块接收并检测包括在其上调制的高带宽信号的光通道光。电光模块包括：单光混合器，用于将光通道光与相应的连续波局部振荡器光混合，以产生包含高带宽数据信号的混合光，至少一个光电检测器; 以及用于产生一组并行模拟信号的模拟频率抽取器，每个模拟信号表示高带宽信号的相应部分。电子信号处理IC包括相应的模拟数字（A / D）转换器，用于对该组并行模拟信号中的每一个采样，并用于产生相应的并行数字采样流; 以及用于处理并行数字采样流以提取高带宽信号的数字信号处理器（DSP）。

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