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    • 1. 发明授权
    • Carrier phase synchronizing circuit capable of recovering carrier phase
synchronization at a short time
    • 载波相位同步电路能够在短时间内恢复载波相位同步
    • US4968955A
    • 1990-11-06
    • US441115
    • 1989-11-27
    • Atsushi YoshidaTakanao Suzuki
    • Atsushi YoshidaTakanao Suzuki
    • H04L27/38
    • H04L27/3872
    • In a receiver comprising a demodulator for demodulating a received signal into a demodulated signal, a carrier phase synchronizing circuit comprises a phase rotating circuit for phase rotating the demodulated signal into a phase-rotated signal in response to a phase rotation control signal, a first carrier phase extracting circuit for extracting a first carrier phase error estimation signal from the phase-rotated signal, a second carrier phase extracting circuit for extracting a second carrier phase error estimation signal from the phase-rotated signal, a comparator for comparing a second carrier phase estimated error value indicated by the second carrier phase error estimation signal with a threshold value to produce a comparison result signal, a selector for selecting one of the first and the second carrier phase error estimation signals as a selected carrier phase error estimation signal in response to the comparison result signal, and a low-pass filter for filtering the selected carrier phase error estimation signal to produce the phase rotation control signal. The low-pass filter may have a controllable passband controlled by a bandwidth control circuit which responds to the comparison result signal. The carrier phase synchronizing circuit may further comprise an equalizer for equalizing the demodulated signal before supply to the phase rotating circuit in response to an equalization control circuit which responds to the comparison result signal.
    • 在包括用于将接收信号解调为解调信号的解调器的接收机中,载波相位同步电路包括用于响应于相位旋转控制信号将解调信号相位旋转为相位旋转信号的相位旋转电路,第一载波 相位提取电路,用于从相位旋转信号中提取第一载波相位误差估计信号;第二载波相位提取电路,用于从相位旋转信号中提取第二载波相位误差估计信号;比较器,用于比较第二载波相位估计 由具有阈值的第二载波相位误差估计信号指示的误差值,以产生比较结果信号;选择器,用于响应于所述第一和第二载波相位误差估计信号,选择第一和第二载波相位误差估计信号中的一个作为选择的载波相位误差估计信号 比较结果信号和用于过滤所选择的ca的低通滤波器 rrier相位误差估计信号产生相位旋转控制信号。 低通滤波器可以具有由响应于比较结果信号的带宽控制电路控制的可控通带。 载波相位同步电路还可以包括均衡器,用于响应于对比较结果信号进行响应的均衡控制电路,在提供给相位旋转电路之前均衡解调信号。
    • 2. 发明授权
    • Timing signal recovery circuit for a data transmission system
    • 数据传输系统的定时信号恢复电路
    • US5022058A
    • 1991-06-04
    • US454276
    • 1989-12-21
    • Atsushi YoshidaTakanao Suzuki
    • Atsushi YoshidaTakanao Suzuki
    • H03L7/091H03L7/107H04L7/033
    • H03L7/091H03L7/107H04L7/0332
    • A timing signal recovery circuit for recovering a timing signal from a received signal includes a circuit for extracting a timing signal from the received signal; a voltage-controlled oscillator (VCO) to generate a local timing signal; a phase-difference detecting circuit for detecting a phase difference between the extracted timing signal and the local timing signal; a loop filter responsive to the detected phase difference for generating a VCO control voltage supplied to the VCO; and a circuit for controlling the loop filter such that the VCO control voltage remains substantially within a predetermined voltage range. The loop filter control circuit substantially prevents instability of the VCO.
    • 用于从接收信号中恢复定时信号的定时信号恢复电路包括:用于从接收信号中提取定时信号的电路; 用于产生本地定时信号的压控振荡器(VCO); 相位差检测电路,用于检测所提取的定时信号和本地定时信号之间的相位差; 响应于检测到的相位差的环路滤波器,用于产生提供给VCO的VCO控制电压; 以及用于控制环路滤波器的电路,使得VCO控制电压基本上保持在预定电压范围内。 环路滤波器控制电路基本上防止了VCO的不稳定性。
    • 7. 发明授权
    • Image modulation apparatus, method, and program
    • 图像调制装置,方法和程序
    • US09076369B2
    • 2015-07-07
    • US13754968
    • 2013-01-31
    • Atsushi Yoshida
    • Atsushi Yoshida
    • G09G5/02G06F3/14G09G5/00
    • G09G5/02G06F3/1454G09G5/003G09G2320/0693G09G2370/022G09G2370/042
    • An image modulation apparatus includes a device information obtaining unit to obtain device property information of a plurality of display devices respectively disposed at a plurality of image distribution destination apparatuses; a simulated image generator to generate a simulated image to be displayed on each of the display devices disposed at each of the image distribution destination apparatuses based on a distribution target image, to be transmitted to each of the image distribution destination apparatuses, and the device property information of each of the display devices obtained by the device information obtaining unit; and an image modulation unit to modulate the distribution target image based on a modulation instruction prepared for the plurality of the simulated images simulated by the simulated image generator.
    • 图像调制装置包括:设备信息获取单元,用于获得分别设置在多个图像分发目的地设备上的多个显示设备的设备属性信息; 模拟图像生成器,用于生成待发送到每个图像分发目的地设备的基于分发对象图像而在每个图像分发目的地设备上设置的每个显示设备上显示的模拟图像,以及设备属性 由设备信息获取单元获得的每个显示设备的信息; 以及图像调制单元,用于基于由模拟图像生成器模拟的多个模拟图像准备的调制指令来调制分布对象图像。
    • 10. 发明授权
    • Maintenance method for liquid ejecting apparatus
    • 液体喷射装置的维护方法
    • US08356876B2
    • 2013-01-22
    • US13015101
    • 2011-01-27
    • Atsushi Yoshida
    • Atsushi Yoshida
    • B41J29/393
    • B41J2/165
    • There is a first process of pressurizing the liquid introduced into the discharge pipe by driving a pump device and transferring the liquid to one end side of the discharge pipe; a second process of applying an electric field between a liquid reception unit, which is disposed to face the surface of the nozzle openings of the liquid ejecting head in a non-contact state, communicates with the other end side of the discharge pipe and is ejected with liquid from the nozzles, and the surface of the nozzle openings; a third process of detecting a change in voltage based on electrostatic induction when the pressurizing of the liquid in the discharge pipe due to the pump device is released; and a fourth process of detecting the discharge state of the liquid from the discharge pipe on the basis of detection result of the change in voltage.
    • 通过驱动泵装置并将液体输送到排出管的一端侧,对引入排出管的液体进行加压的第一工序; 与处于非接触状态的液体喷射头的喷嘴开口的表面配置的液体接收单元之间施加电场的第二过程与排出管的另一端侧连通并被排出 来自喷嘴的液体和喷嘴开口的表面; 当排出管中的液体由于泵装置的加压被释放时,基于静电感应来检测电压变化的第三过程; 以及基于电压变化的检测结果检测来自排出管的液体的排出状态的第四处理。