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公开(公告)号：US20230336185A1
公开(公告)日：2023-10-19
申请号：US17768168
申请日：2019-10-23
发明人： Munehiko Nagatani , Teruo Jo , Hiroshi Yamazaki , Hideyuki Nosaka
IPC分类号： H03M1/12 , H03K17/693
CPC分类号： H03M1/1255 , H03M1/1295 , H03K17/693
摘要： An analog demultiplexer circuit includes a clock distribution circuit that outputs clock signals (CK1P and CK1N) and clock signals (CK2P and CK2N) complementary thereto, a track-and-hold circuit that holds analog input signals (VINP and VINN) in synchronization with the clock signals (CK1P and CK1N), and a track-and-hold circuit that holds the analog input signals (VINP and VINN) in synchronization with the clock signals (CK2P and CK2N).
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公开(公告)号：US20210194523A1
公开(公告)日：2021-06-24
申请号：US17053237
申请日：2019-04-22
发明人： Teruo Jo , Munehiko Nagatani , Hiroshi Hamada , Hiroyuki Fukuyama , Hideyuki Nosaka , Hiroshi Yamazaki
摘要： A digital signal process unit includes a first cancel signal generation unit and a second cancel signal generation unit. The first cancel signal generation unit generates, as a first cancel signal component, a cancel signal component corresponding to an image signal included in an analog signal output from a mixer. The second cancel signal generation unit generates, as a second cancel signal component, a cancel signal component corresponding to a leakage signal generated between an input and output of the mixer. The digital signal process unit includes subtractors for subtracting the first cancel signal component and the second cancel signal component from a signal component corresponding to a frequency band divided from an input signal to obtain a digital signal.
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公开(公告)号：US10177780B2
公开(公告)日：2019-01-08
申请号：US15754033
申请日：2016-08-19
摘要： In the conventional technique, only an output having a bandwidth identical to the bandwidth of individual DACs has been obtained even by using a plurality of DACs. Also, even when the output of a bandwidth broader than the individual DAC is obtained, there has been a problem associated with asymmetricity of a circuit configuration. In a signal generating device of the present invention, a plurality of normal DACs are combined to realize an analog output of a broader bandwidth beyond the output bandwidth of the individual DACs, and the problem of the asymmetricity of the circuit configuration is also resolved. A desired signal is separated into a low-frequency signal and a high-frequency signal in a frequency domain, and a series of operation of constant (r)-folding the amplitude of the high-frequency signal and shifting it on the frequency axis to superimpose it on the low-frequency signal are made in a digital domain. The output of each DAC is switched by an analog multiplexer.
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公开(公告)号：US09128348B1
公开(公告)日：2015-09-08
申请号：US14418386
申请日：2013-09-26
CPC分类号： G02F1/225 , G02F1/0123 , G02F1/035 , G02F1/2255 , G02F1/2257 , G02F2001/212 , G02F2201/126 , G02F2201/16 , G02F2203/19 , H04B10/5051 , H04B10/588
摘要： An optical modulation circuit includes: a first Mach-Zehnder modulating portion including a first output port and a second output port, wherein the first Mach-Zehnder modulating portion is push-pull driven by a main signal; a second Mach-Zehnder modulating portion connected to the first output port of the first Mach-Zehnder modulating portion, wherein the second Mach-Zehnder modulating portion is push-pull driven by a correction signal; and an asymmetric light combining portion combining an optical signal outputted from an output port of the second Mach-Zehnder modulating portion with an optical signal outputted from the second output port of the first Mach-Zehnder modulating portion in a light intensity coupling ratio of r to 1−r, wherein an optical path length from the first output port to the asymmetric light combining portion is substantially equal to an optical path length from the second output port to the asymmetric light combining portion.
摘要翻译： 光调制电路包括：第一马赫 - 曾德调制部分，包括第一输出端口和第二输出端口，其中第一马赫 - 策德尔调制部分由主信号驱动; 第二马赫 - 策德尔调制部分，连接到第一马赫 - 策德尔调制部分的第一输出端口，其中第二马赫 - 策德尔调制部分由校正信号驱动; 以及非对称光合成部，其将从所述第二马赫 - 策德尔调制部的输出端口输出的光信号与从所述第一马赫 - 策德尔调制部的所述第二输出端口输出的光信号的光强度耦合比率r 1-r，其中从第一输出端口到非对称光合成部分的光路长度基本上等于从第二输出端口到非对称光合并部分的光路长度。
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公开(公告)号：US11888495B2
公开(公告)日：2024-01-30
申请号：US17768168
申请日：2019-10-23
发明人： Munehiko Nagatani , Teruo Jo , Hiroshi Yamazaki , Hideyuki Nosaka
IPC分类号： H03M1/12 , H03K17/693
CPC分类号： H03M1/1255 , H03K17/693 , H03M1/1295
摘要： An analog demultiplexer circuit includes a clock distribution circuit that outputs clock signals (CK1P and CK1N) and clock signals (CK2P and CK2N) complementary thereto, a track-and-hold circuit that holds analog input signals (VINP and VINN) in synchronization with the clock signals (CK1P and CK1N), and a track-and-hold circuit that holds the analog input signals (VINP and VINN) in synchronization with the clock signals (CK2P and CK2N).
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公开(公告)号：US20210320735A1
公开(公告)日：2021-10-14
申请号：US17274526
申请日：2019-06-24
IPC分类号： H04J1/08
摘要： A signal generating device includes a digital signal processing unit, M sub DACs of which an analog bandwidth is fB, M being an integer equal to or greater than 2, a broadband analog signal generating unit configured to generate a broadband analog signal that includes a component of a frequency of (M-1)fB or more by using M analog signals output from the M sub DACs. The digital signal processing unit includes components for generating M original divided signals that correspond to signals obtained by dividing a desired output signal into M portions on a frequency axis and down-converting the portions to the baseband, components for generating M folded divided signals by folding back the M original divided signals on the frequency axis, and a 2M×M filter that takes the original divided signals and the folded divided signals as inputs and outputs M composite signals to be transmitted to the M sub DACs. The 2M×M filter can set a response function independently for each of 2M2 combinations of input and output.
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公开(公告)号：US20150261059A1
公开(公告)日：2015-09-17
申请号：US14418386
申请日：2013-09-26
IPC分类号： G02F1/225
CPC分类号： G02F1/225 , G02F1/0123 , G02F1/035 , G02F1/2255 , G02F1/2257 , G02F2001/212 , G02F2201/126 , G02F2201/16 , G02F2203/19 , H04B10/5051 , H04B10/588
摘要： An optical modulation circuit includes: a first Mach-Zehnder modulating portion including a first output port and a second output port, wherein the first Mach-Zehnder modulating portion is push-pull driven by a main signal; a second Mach-Zehnder modulating portion connected to the first output port of the first Mach-Zehnder modulating portion, wherein the second Mach-Zehnder modulating portion is push-pull driven by a correction signal; and an asymmetric light combining portion combining an optical signal outputted from an output port of the second Mach-Zehnder modulating portion with an optical signal outputted from the second output port of the first Mach-Zehnder modulating portion in a light intensity coupling ratio of r to 1-r, wherein an optical path length from the first output port to the asymmetric light combining portion is substantially equal to an optical path length from the second output port to the asymmetric light combining portion.
摘要翻译： 光调制电路包括：第一马赫 - 曾德调制部分，包括第一输出端口和第二输出端口，其中第一马赫 - 策德尔调制部分由主信号驱动; 第二马赫 - 策德尔调制部分，连接到第一马赫 - 策德尔调制部分的第一输出端口，其中第二马赫 - 策德尔调制部分由校正信号驱动; 以及非对称光合成部，其将从所述第二马赫 - 策德尔调制部的输出端口输出的光信号与从所述第一马赫 - 策德尔调制部的所述第二输出端口输出的光信号的光强度耦合比率r 1-r，其中从第一输出端口到非对称光合成部分的光路长度基本上等于从第二输出端口到非对称光合并部分的光路长度。
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公开(公告)号：US20140314366A1
公开(公告)日：2014-10-23
申请号：US14358362
申请日：2012-12-21
发明人： Hiroshi Yamazaki , Takashi Saida , Takashi Goh
CPC分类号： G02F1/225 , G02F1/011 , G02F1/2255 , G02F1/2257 , G02F2001/212
摘要： An optical modulator comprises an input optical splitting unit for bifurcating input light; a final optical coupling unit for coupling optical signals in a polarization state orthogonal to each other; an intermediate optical coupling unit provided in an intermediate position between the input optical splitting unit and the final optical coupling unit; first and second optical paths for connecting the input optical splitting unit and the intermediate optical coupling unit, optical path lengths of the first and second optical paths are approximately equal; third and fourth optical paths for connecting the intermediate optical coupling unit and the final optical coupling unit, optical path lengths of third and fourth optical paths are approximately equal; and three binary phase modulation unit arranged one by one in each of the three optical paths of the first, second, third and fourth optical paths.
摘要翻译： 一种光调制器，包括用于使输入光分叉的输入光分路单元; 用于耦合彼此正交的偏振状态的光信号的最终光耦合单元; 中间光耦合单元，设置在输入光分路单元和最终光耦合单元之间的中间位置; 用于连接输入光分路单元和中间光耦合单元的第一和第二光路，第一和第二光路的光路长度近似相等; 用于连接中间光耦合单元和最终光耦合单元的第三和第四光路，第三和第四光路的光路长度近似相等; 以及在第一，第二，第三和第四光路的三个光路中的每一个中逐个布置的三个二进制相位调制单元。
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公开(公告)号：US11438083B2
公开(公告)日：2022-09-06
申请号：US17274526
申请日：2019-06-24
IPC分类号： H04J1/08
摘要： A signal generating device includes a digital signal processing unit, M sub DACs of which an analog bandwidth is fB, M being an integer equal to or greater than 2, a broadband analog signal generating unit configured to generate a broadband analog signal that includes a component of a frequency of (M-1)fB or more by using M analog signals output from the M sub DACs. The digital signal processing unit includes components for generating M original divided signals that correspond to signals obtained by dividing a desired output signal into M portions on a frequency axis and down-converting the portions to the baseband, components for generating M folded divided signals by folding back the M original divided signals on the frequency axis, and a 2M×M filter that takes the original divided signals and the folded divided signals as inputs and outputs M composite signals to be transmitted to the M sub DACs. The 2M×M filter can set a response function independently for each of 2M2 combinations of input and output.
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公开(公告)号：US11194219B2
公开(公告)日：2021-12-07
申请号：US16981651
申请日：2019-03-19
摘要： An optical modulator according to embodiments includes a first MZI and a second MZI each including a first optical coupler that splits CW light into two, a second optical coupler that couples the CW light split by the first optical coupler and outputs the CW light, and a bias electrode that adjusts a phase of the CW light split by the first optical coupler, a third optical coupler that couples outputs of the first MZI and the second MZI with at a predetermined ratio and outputs the light, and a bias adjustment circuit that adjusts an output voltage of a bias power supply applied to a bias electrode so that an optical path length difference between the CW light beams split by the first optical coupler is a predetermined times a carrier wavelength under a condition that an output of a differential output amplifier is a zero level, in accordance with an operating mode of the own apparatus.
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