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    • 1. 发明申请
    • COMPLEX SIGNAL PROCESSING CIRCUIT, RECEIVER CIRCUIT, AND SIGNAL REPRODUCTION DEVICE
    • 复合信号处理电路,接收器电路和信号再现装置
    • US20110293046A1
    • 2011-12-01
    • US13206226
    • 2011-08-09
    • Fumiaki SenoueKouichi Nagano
    • Fumiaki SenoueKouichi Nagano
    • H04L27/06H03M1/12
    • H04B1/30H03D3/009H04L27/3863
    • An analog complex filter combines an in-phase signal and a quadrature signal to output first and second analog signals. An analog-to-digital converter converts the first and second analog signals into first and second digital signals. A digital complex filter attenuates components corresponding to the quadrature signal and the in-phase signal of the first and second digital signals, respectively. A digital bandwidth limited filter allows a target component and an image component contained in the digital complex signal composed of the first and second digital signals from the digital complex filter to pass therethrough, and attenuates an adjacent interference component. An IQ imbalance correction circuit corrects a quadrature error and an amplitude error between the first and second digital signals from the digital band-pass filter.
    • 模拟复合滤波器将同相信号和正交信号组合以输出第一和第二模拟信号。 模数转换器将第一和第二模拟信号转换成第一和第二数字信号。 数字复合滤波器分别衰减对应于第一和第二数字信号的正交信号和同相信号的分量。 数字带宽限制滤波器允许包含在由数字复合滤波器的第一和第二数字信号组成的数字复合信号中的目标分量和图像分量通过,并衰减相邻的干扰分量。 IQ失衡校正电路校正的正交误差,并从所述数字带通滤波器的第一和第二数字信号之间的振幅误差。
    • 2. 发明授权
    • Complex signal processing circuit, receiver circuit, and signal reproduction device
    • 复信号处理电路,接收电路和信号再现装置
    • US08223902B2
    • 2012-07-17
    • US13206226
    • 2011-08-09
    • Fumiaki SenoueKouichi Nagano
    • Fumiaki SenoueKouichi Nagano
    • H03D1/04H04B1/10
    • H04B1/30H03D3/009H04L27/3863
    • An analog complex filter combines an in-phase signal and a quadrature signal to output first and second analog signals. An analog-to-digital converter converts the first and second analog signals into first and second digital signals. A digital complex filter attenuates components corresponding to the quadrature signal and the in-phase signal of the first and second digital signals, respectively. A digital bandwidth limited filter allows a target component and an image component contained in the digital complex signal composed of the first and second digital signals from the digital complex filter to pass therethrough, and attenuates an adjacent interference component. An IQ imbalance correction circuit corrects a quadrature error and an amplitude error between the first and second digital signals from the digital band-pass filter.
    • 模拟复合滤波器将同相信号和正交信号组合以输出第一和第二模拟信号。 模数转换器将第一和第二模拟信号转换成第一和第二数字信号。 数字复合滤波器分别衰减对应于第一和第二数字信号的正交信号和同相信号的分量。 数字带宽限制滤波器允许包含在由数字复合滤波器的第一和第二数字信号组成的数字复合信号中的目标分量和图像分量通过,并衰减相邻的干扰分量。 IQ不平衡校正电路校正来自数字带通滤波器的第一和第二数字信号之间的正交误差和振幅误差。
    • 3. 发明授权
    • Digital PLL circuit, semiconductor integrated circuit, and display apparatus
    • 数字PLL电路,半导体集成电路和显示装置
    • US08648632B2
    • 2014-02-11
    • US13313638
    • 2011-12-07
    • Hiroki MouriKouji OkamotoFumiaki Senoue
    • Hiroki MouriKouji OkamotoFumiaki Senoue
    • H03L7/06
    • H03D13/003H03L7/087H03L2207/50
    • In a digital PLL circuit, a phase comparison circuit counts the numbers of transitions of a reference clock and an oscillation clock, sets a time taken until the number of transitions of the reference clock reaches a reference count value as a phase comparison time period, and detects, as a phase error value, a difference between a target count value, obtained based on a magnification value of a desired oscillating frequency with respect to the frequency of the reference clock and the reference count value, and the number of transitions of the oscillation clock in the phase comparison time period. A smoothing circuit smoothes the phase error value. A digitally-controlled oscillation circuit controls the frequency of the oscillation clock in accordance with the phase error value smoothed by the smoothing circuit.
    • 在数字PLL电路中,相位比较电路对参考时钟和振荡时钟的转换次数进行计数,将所参考时钟的转换次数达到参考计数值所花费的时间设置为相位比较时间段,以及 将作为相位误差值的目标计数值相对于基准时钟的频率和基准计数值的期望的振荡频率的倍率值与振荡的转移次数进行比较, 时钟在相位比较时间段。 平滑电路平滑相位误差值。 数字控制振荡电路根据平滑电路平滑的相位误差值来控制振荡时钟的频率。
    • 4. 发明授权
    • Digital PLL circuit and communication device
    • 数字PLL电路和通信设备
    • US08780974B2
    • 2014-07-15
    • US13049645
    • 2011-03-16
    • Fumiaki SenoueKouji Okamoto
    • Fumiaki SenoueKouji Okamoto
    • H04N7/12H03L7/091H03L7/087
    • H03L7/087H03L7/091H03L2207/50
    • In a digital PLL circuit outputting a clock signal with a frequency obtained by multiplying a frequency of a reference signal by a frequency command word (a frequency ratio), an RPA serially adds a frequency command word containing a fractional component. An output of the RPA is input to a minute phase error generator. The phase error generator generates a plurality of threshold values close to an actual amplitude value of the reference signal based on the fractional portion of the serially added value of the frequency command word, calculates the amplitude value of the reference signal and a phase error of the reference signal corresponding to the amplitude value based on the threshold values, and calculates a minute phase error between the reference signal and the output clock.
    • 在通过将参考信号的频率乘以频率指令字(频率比)而获得的频率输出时钟信号的数字PLL电路中,RPA串行地添加包含分数分量的频率指令字。 RPA的输出被输入到微小的相位误差发生器。 相位误差发生器基于频率指令字的串行相加值的小数部分产生接近参考信号的实际振幅值的多个阈值,计算参考信号的振幅值和相位误差的相位误差 基于阈值对应于振幅值的参考信号,并计算参考信号和输出时钟之间的微小相位误差。
    • 7. 发明申请
    • DIGITAL PLL CIRCUIT, SEMICONDUCTOR INTEGRATED CIRCUIT, AND DISPLAY APPARATUS
    • 数字PLL电路,半导体集成电路和显示设备
    • US20120081339A1
    • 2012-04-05
    • US13313638
    • 2011-12-07
    • Hiroki MOURIKouji OkamotoFumiaki Senoue
    • Hiroki MOURIKouji OkamotoFumiaki Senoue
    • G09G5/00H03L7/08
    • H03D13/003H03L7/087H03L2207/50
    • In a digital PLL circuit, a phase comparison circuit counts the numbers of transitions of a reference clock and an oscillation clock, sets a time taken until the number of transitions of the reference clock reaches a reference count value as a phase comparison time period, and detects, as a phase error value, a difference between a target count value, obtained based on a magnification value of a desired oscillating frequency with respect to the frequency of the reference clock and the reference count value, and the number of transitions of the oscillation clock in the phase comparison time period. A smoothing circuit smoothes the phase error value. A digitally-controlled oscillation circuit controls the frequency of the oscillation clock in accordance with the phase error value smoothed by the smoothing circuit.
    • 在数字PLL电路中,相位比较电路对参考时钟和振荡时钟的转换次数进行计数,将所参考时钟的转换次数达到参考计数值所花费的时间设置为相位比较时间段,以及 将作为相位误差值的目标计数值相对于基准时钟的频率和基准计数值的期望的振荡频率的倍率值与振荡的转移次数进行比较, 时钟在相位比较时间段。 平滑电路平滑相位误差值。 数字控制振荡电路根据平滑电路平滑的相位误差值来控制振荡时钟的频率。