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    • 1. 发明授权
    • Amplifier with feedforward loops for rejecting non-linear distortion
    • 具有用于拒绝非线性失真的前馈环路的放大器
    • US06172560B2
    • 2001-01-09
    • US09418014
    • 1999-10-14
    • Kazuo YamashitaYasushi NakagawaAkira Yamada
    • Kazuo YamashitaYasushi NakagawaAkira Yamada
    • H03F366
    • H03F1/3235
    • An amplifier with feedforward loops for rejecting non-linear distortion and control circuitry for such amplifier and employing a distortion compensation method. A signal from a dominant path is input into a synchronizing detector via an ALC circuit as a reference signal. Using this reference signal, an error signal output from a distortion rejection loop is subjected to synchronizing detection. An offset voltage of a mixer inside the synchronizing detector can be prevented from varying due to change in local level. Outputs from synchronizing detectors are used for control to optimize corresponding loops. As a pilot signal for a distortion detection loop can be eliminated, undesirable spurious effects due to such a pilot signal is avoided. The acquisition time of each of the loops can be shortened because an optimizing control using a step-by-step procedure under CPU control can be eliminated.
    • 具有用于拒绝非线性失真的前馈环路的放大器和用于这种放大器的控制电路并采用失真补偿方法。 来自主路径的信号通过ALC电路作为参考信号输入同步检测器。 使用该参考信号,从失真抑制环路输出的误差信号经受同步检测。 可以防止同步检测器内的混频器的偏移电压由于局部电平的变化而变化。 来自同步检测器的输出用于控制以优化相应的环路。 由于可以消除用于失真检测环路的导频信号,所以避免了由于这种导频信号导致的不期望的寄生效应。 可以缩短每个循环的采集时间,因为可以消除使用CPU控制下的逐步过程的优化控制。
    • 2. 发明授权
    • Feed-forward amplifier and controller of the same
    • 前馈放大器和控制器相同
    • US06489844B2
    • 2002-12-03
    • US09735759
    • 2000-12-13
    • Kazuo YamashitaAkira ItoHironori SakamotoKeijiro ItoAkira YamadaNorihisa Kawasumi
    • Kazuo YamashitaAkira ItoHironori SakamotoKeijiro ItoAkira YamadaNorihisa Kawasumi
    • H03F366
    • H03F1/3235
    • A feed-forward amplifier and a controller thereof. Two types of second pilot signals, sum frequency and difference frequency of a base pilot signal and a local oscillation signal, are generated by an injection-side mixer and injected into a distortion detection loop. Part of a signal appearing at an output terminal is branched, converted in frequency by a detection-side mixer using the local oscillation signal, filtered by a narrow-band filter, input to a synchronizing detector with the filtered output of the filter as error signals, and synchronizing detected with reference to the base pilot signal so as to generate control signals for a distortion rejection loop. The spectrums of the second pilot signals may be spread. A process to cancel the input signal component at the detection side may be performed. A simple circuit configuration enhances the distortion component rejection and suppression effect and shortens the time required until an optimum control state is established.
    • 一种前馈放大器及其控制器。 通过注入侧混频器产生两种类型的第二导频信号,基频导频信号和本地振荡信号的和频和差频,并将其注入到失真检测环路中。 出现在输出端子处的信号的一部分通过检测侧混频器被分频,使用本地振荡信号进行滤波,由窄带滤波器滤波,输入到同步检测器,滤波器的滤波器作为误差信号 并且参考基准导频信号进行同步检测,以产生用于失真抑制环路的控制信号。 可以扩展第二导频信号的频谱。 可以执行消除检测侧的输入信号分量的处理。 简单的电路配置增强了失真分量抑制和抑制效果,缩短了所需的时间,直到建立最佳控制状态。
    • 3. 发明申请
    • Spherical calcium carbonate and method for producing thereof
    • 球形碳酸钙及其制造方法
    • US20060165583A1
    • 2006-07-27
    • US10547000
    • 2004-02-26
    • Kenshiro MakinoKazuo Yamashita
    • Kenshiro MakinoKazuo Yamashita
    • C01F11/18C01F5/24
    • D21H19/385A61K8/19A61Q1/00C01F11/182C01P2004/32C01P2004/61C01P2006/21C01P2006/60
    • When spherical calcium carbonate is produced by blowing a carbon dioxide gas or a carbon dioxide-containing gas into an aqueous suspension containing calcium hydroxide to react them, after start of the reaction, an aqueous solution or suspension of a water-soluble phosphoric acid compound or a water-soluble salt thereof is added to the reaction mixture when carbonation ratio reaches 2 to 10%, and the reaction is further allowed to continue at a low gas blowing rate of 1.0 NL/minute or lower (step (a)). Subsequently, an aqueous suspension containing calcium hydroxide and an aqueous solution or suspension of a water-soluble phosphoric acid compound or a water-soluble salt thereof are added to the reaction mixture, and a carbon dioxide gas or a carbon dioxide-containing gas is introduced to allow to react and thereby produce spherical calcium carbonate having a mean particle diameter of 10 μm or larger. This production method is performed under high velocity revolution from the start of the reaction to the end of the step (a) This method provides calcite type spherical calcium carbonate showing high brightness and small friction coefficient, and having a shape comparatively close to a true sphere and a mean particle diameter of 10 μm or larger.
    • 当通过将二氧化碳气体或含二氧化碳的气体吹入含有氢氧化钙的水性悬浮液中以使其发生反应而制备球形碳酸钙时,反应开始后,将水溶性磷酸化合物或水溶性磷酸化合物的水溶液或悬浮液 当碳酸化比达到2〜10%时,将其水溶性盐加入到反应混合物中,并且进一步允许反应以1.0NL /分钟以下的低气体吹入速率继续(步骤(a))。 随后,将含有氢氧化钙的水性悬浮液和水溶性磷酸化合物或其水溶性盐的水溶液或悬浮液加入到反应混合物中,并引入二氧化碳气体或含二氧化碳的气体 使其反应,从而生成平均粒径为10μm以上的球状碳酸钙。 该制造方法在从反应开始到步骤(a)结束的高速旋转下进行。该方法提供了表现出高亮度和小摩擦系数的方解石型球形碳酸钙,并且具有比较接近真实球体的形状 平均粒径为10μm以上。
    • 5. 发明授权
    • Delay detection circuit and low-noise oscillation circuit using the same
    • 延迟检测电路和低噪声振荡电路使用相同
    • US5521557A
    • 1996-05-28
    • US465107
    • 1995-06-05
    • Kazuo YamashitaNobuyuki Adachi
    • Kazuo YamashitaNobuyuki Adachi
    • H03L1/00H03B1/04H03L7/00H03L7/02H03L7/099H03L7/113H03L7/085H03L7/087
    • H03L7/02H03L7/113
    • A delay detection circuit and a low-noise oscillation circuit using such a delay detection circuit. When the oscillation output of a VCO is to be supplied to two high frequency mixers, a .pi./2 phase shifter 24 in the front stage of one of the high frequency mixers gives a quadrature form. High frequency components are removed from the output voltage of the high frequency mixers by LPF. DC components are also removed from the output voltage of the high frequency mixers by HPF. The output voltages of low frequency mixers contain secondary phase noise components proportional to squared phase noise components and primary phase noise components proportional to the phase noise components and also depending on the delay time .tau. of a delay unit. When the output voltage of one of the low frequency mixers is subtracted from the output voltage of the other low frequency mixer, the secondary phase noise components are offset and the dependence on the delay time .tau. is removed from the primary phase noise components. The resulting voltage is used as a control voltage for the VCO (10). No voltage control delay unit or feedback loop for controlling it are required.
    • 延迟检测电路和使用这种延迟检测电路的低噪声振荡电路。 当将VCO的振荡输出提供给两个高频混频器时,高频混频器之一的前级中的pi / 2移相器24提供正交形式。 通过LPF从高频混频器的输出电压中去除高频分量。 也可以通过HPF从高频混频器的输出电压中去除直流分量。 低频混频器的输出电压包含与平方相位噪声分量成正比的次级相位噪声分量和与相位噪声分量成比例的初级相位噪声分量,并且还取决于延迟单元的延迟时间τ。 当从另一个低频混频器的输出电压中减去一个低频混频器的输出电压时,二次相位噪声分量被偏移,并且从主相位噪声分量中去除了对延迟时间τ的依赖。 所得到的电压用作VCO(10)的控制电压。 无需控制电压控制延迟单元或反馈回路。
    • 8. 发明授权
    • Latch circuit for latching data at an edge of a clock signal
    • 用于在时钟信号的边沿锁存数据的锁存电路
    • US06310501B1
    • 2001-10-30
    • US09449234
    • 1999-11-24
    • Kazuo Yamashita
    • Kazuo Yamashita
    • H03K312
    • H03K3/356139
    • A latch circuit comprises a delaying inverter circuit 1 for inverting a clock signal CLK with a predetermined delay, a precharge circuit for precharging a first node A and a second node B of the latch circuit to a predetermined potential during a time period in which the clock signal is in a first logic level, a first amplifier circuit for providing a potential difference between the first node A and the second node B in response to an input signal DIN during a first time period in which the clock signal CLK and an output signal iCLK of the delaying inverter circuit are in a second logic level, a second amplifier circuit for amplifying the potential difference between the first node and the second node during a time period in which the clock signal is in the second logic level and a flip-flop circuit adapted to be set and reset according to the potentials at the first and second nodes.
    • 锁存电路包括用于以预定延迟反相时钟信号CLK的延迟反相器电路1,用于在时钟周期期间将锁存电路的第一节点A和第二节点B预充电到预定电位的预充电电路 信号处于第一逻辑电平,第一放大器电路,用于在第一时间段期间响应于输入信号DIN提供第一节点A和第二节点B之间的电位差,其中时钟信号CLK和输出信号iCLK 所述延迟逆变器电路处于第二逻辑电平;第二放大器电路,用于在所述时钟信号处于所述第二逻辑电平的时间段内放大所述第一节点和所述第二节点之间的电位差;以及触发器电路 适于根据第一和第二节点处的电位进行设置和复位。
    • 9. 发明授权
    • Composite longitudinal vibration mechanical filter's method of
manufacturing including undesired vibration absorber
    • 复合纵向振动机械过滤器的制造方法包括不需要的振动吸收器
    • US5740595A
    • 1998-04-21
    • US582585
    • 1996-01-03
    • Kazuo YamashitaYoshihiko TakeuchiMasahiro Watanabe
    • Kazuo YamashitaYoshihiko TakeuchiMasahiro Watanabe
    • H03H3/02H03H9/09H03H9/50H04R17/00
    • H03H3/02H03H9/09H03H9/50Y10T29/42
    • A method of manufacturing a composite longitudinal vibration mechanical filter that vibrates at a preselected central frequency in a high frequency range. The filter includes a plurality of vibratable bodies including input and output vibratable bodies each having respective piezoelectric members superposed thereon. Coupling elements couple the vibratable bodies to each other. Supporting elements project respectively from the input and output vibratable bodies. A holder is provided to which the supporting elements are attached. The method includes forming an integral body including the plurality of vibratable bodies, the coupling elements, the supporting elements, the holder and a vibration absorbing body holder for eliminating unnecessary vibrations. The vibration absorbing body holder is disposed between at least one of the vibratable bodies and the holder, and is disposed so as to absorb unnecessary vibrations which are transmitted to the output vibratable body, and to reduce unnecessary spurious responses occurring outside of a bandpass region of the filter. The piezoelectric members are fixedly superposed on the input and output vibratable bodies in sandwiching relation thereto, and respective electrodes are connected to the piezoelectric members.
    • 一种复合纵向振动机械滤波器的制造方法,其在高频范围内以预选的中心频率振动。 滤波器包括多个可振动体,包括输入和输出可振动体,每个振动体各自具有叠加在其上的各个压电构件。 耦合元件将可振动体彼此耦合。 支撑元件分别来自输入和输出振动体。 提供支撑元件附接到的保持器。 该方法包括形成包括多个可振动体,联接元件,支撑元件,保持器和用于消除不必要的振动的振动吸收体保持器的整体。 振动吸收体保持器设置在至少一个可振动体和保持器之间,并且被布置为吸收被传输到输出可振动体的不必要的振动,并且减少发生在输出振动体的带通区域之外的不必要的杂散响应 过滤器。 压电构件与输入和输出可振动体固定地重叠,并且各个电极连接到压电构件。
    • 10. 发明授权
    • Composite longitudinal vibration mechanical filter having central
frequency deviation elimination means and method of manufacturing same
    • 具有中心偏差消除手段的复合纵向振动机械过滤器及其制造方法
    • US5187458A
    • 1993-02-16
    • US483454
    • 1990-02-21
    • Kazuo YamashitaYoshihiko TakeuchiMasahiro Watanabe
    • Kazuo YamashitaYoshihiko TakeuchiMasahiro Watanabe
    • H03H3/02H03H9/09H03H9/50
    • H03H3/02H03H9/09H03H9/50Y10T29/42
    • A composite longitudinal vibration mechanical filter for delivering out a supplied high-frequency signal in a predetermined frequency range includes a plurality of vibratable bodies including input and output longitudinal vibratable tuning bars with piezoelectric members superposed thereon, coupling elements by which the longitudinally vibratable tuning bars are coupled to each other, supporting elements projecting respectively from the input and output longitudinally vibratable tuning bars, and a holder to which the supporting elements are attached. Grooves are defined in the longitudinally vibratable tuning bars at the same time that they are fabricated. The grooves extend in the direction in which the longitudinally vibratable tuning bars are longitudinally vibratable, and are shorter than the length of the longitudinally vibratable tuning bars. Through holes may instead be defined in the longitudinally vibratable tuning bars, the through holes having an opening size smaller than the wavelength of the longitudinal vibration of the longitudinally vibratable tuning bars. Piezoelectric members are fixedly superposed on the input and output longitudinally vibratable tuning bars in sandwiching relation thereto.
    • 用于输出预定频率范围内的所提供的高频信号的复合纵向振动机械滤波器包括多个可振动体,包括输入和输出纵向振动调音杆,压电构件叠加在其上,耦合元件,纵向振动调音杆 彼此耦合,分别从输入和输出纵向可振动调音杆突出的支撑元件和支撑元件附接到的支架。 在纵向可振动调音杆中同时定义槽。 凹槽沿纵向可振动调音杆纵向振动的方向延伸,并且比纵向可振动调音杆的长度短。 可以在纵向可振动调谐杆中定义通孔,通孔的开口尺寸小于纵向可振动调音杆的纵向振动的波长。 压电元件与输入和输出纵向可振动调音杆固定重叠。