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    • 1. 发明授权
    • High-frequency choke circuit
    • 高频扼流圈
    • US5451917A
    • 1995-09-19
    • US360959
    • 1994-12-21
    • Osamu YamamotoShinichi OhmagariMasakazu Nishida
    • Osamu YamamotoShinichi OhmagariMasakazu Nishida
    • H01G4/40H01P1/00H01P1/20H01P1/203H01P3/08
    • H01P1/2039H01P1/2007
    • A high-frequency choke circuit comprises a dielectric layer covered with grounding conductors, a lead line of high-impedance and at least one capacitance land formed within the dielectric layer, and at least one through-hole connecting the lead line and the capacitance land. The capacitance lands are disposed closer to the grounding conductors, resulting in large capacitances with small areas. The capacitance lands are formed on a layer distant from the layer on which the lead line is formed. Therefore, unnecessary electromagnetic coupling with other circuits formed on the same layer as the lead line can be reduced. The grounding conductors cover both surfaces of the dielectric layers that incorporate the capacitance lands and the lead line to thereby shield the circuit formed in the dielectric layers electromagnetically from outside.
    • 高频扼流电路包括覆盖有接地导体的介质层,形成在电介质层内的高阻抗引线和至少一个电容接地,以及至少一个连接引线和电容接地的通孔。 电容平台设置得更靠近接地导体,导致具有小面积的大电容。 电容平台形成在远离形成引线的层的层上。 因此,可以减少与引线相同的层上形成的其它电路的不必要的电磁耦合。 接地导体覆盖包含电容焊盘和引线的电介质层的两个表面,从而从外部电磁屏蔽形成在电介质层中的电路。
    • 3. 发明授权
    • Dual conversion transmitter
    • 双转换发射机
    • US5410747A
    • 1995-04-25
    • US92667
    • 1993-07-14
    • Shinichi OhmagariOsamu Yamamoto
    • Shinichi OhmagariOsamu Yamamoto
    • H04B1/04H03B21/02H03D7/16H03J1/00H03J3/28
    • H03J3/28H03D7/163H03B21/02H03J1/0008
    • A transmitter using a dual conversion system which effects frequency conversion twice has a local oscillator (113) for generating a first local oscillation signal, a multiplier (118) for multiplying the frequency of the first local oscillation signal to produce a second local oscillation signal, a first mixer (115) for mixing the first local oscillation signal and first IF signal to produce a second IF signal, and a second mixer (120) for mixing the second local oscillation signal and second IF signal to produce a signal to be transmitted. A voltage controlled filter (116) whose center frequency varies with the frequency of the first local oscillation signal is connected to the output of the first mixer (115).
    • 使用实现频率转换两次的双转换系统的发射机具有用于产生第一本地振荡信号的本地振荡器(113),用于乘以第一本地振荡信号的频率以产生第二本地振荡信号的乘法器(118) 用于混合第一本地振荡信号和第一IF信号以产生第二IF信号的第一混频器(115),以及用于混合第二本地振荡信号和第二IF信号以产生要发送的信号的第二混频器(120)。 其中心频率随着第一本地振荡信号的频率变化的电压控制滤波器(116)连接到第一混频器(115)的输出端。
    • 4. 发明授权
    • Transmitter having envelope feedback loop and automatic level control
loop
    • 发射机具有包络反馈回路和自动电平控制回路
    • US5553318A
    • 1996-09-03
    • US536342
    • 1995-09-29
    • Shinichi OhmagariOsamu Yamamoto
    • Shinichi OhmagariOsamu Yamamoto
    • H03F1/32H04B1/04H04L27/20H04L27/36
    • H03F1/3247H03F1/3282H04L27/368H03F2200/102
    • It is an object of the present invention to provide a transmitter which is inexpensive and small in size and is reduced in power dissipation and besides wherein the output power of a power amplifier can be varied to an arbitrary value. A phase modulator, a variable attenuator, a high power amplifier, a directional coupler, a detector, an error amplifier, a switch and an analog multiplier form an envelope feedback loop. The envelope feedback loop controls an envelope of a modulated wave detected by the detector so that a base band signal and the envelope of the modulated wave may coincide with each other. The circuits mentioned above, a smoothing circuit, another error amplifier, another switch and an adder form an operation point feedback loop. The operation point feedback loop smoothes an error of an output envelope detection signal of the detector and controls so that the smoothed error may be in the minimum.
    • 本发明的目的是提供一种便宜且体积小并且功率消耗降低的发射机,此外,功率放大器的输出功率可以变化到任意值。 相位调制器,可变衰减器,高功率放大器,定向耦合器,检测器,误差放大器,开关和模拟乘法器形成包络反馈回路。 包络反馈环路控制由检测器检测到的调制波的包络,使得基带信号和调制波的包络彼此一致。 上述电路,平滑电路,另一误差放大器,另一开关和加法器构成操作点反馈回路。 操作点反馈环路平滑检测器的输出包络检测信号的误差,并进行控制,使得平滑的误差可能最小。
    • 10. 发明申请
    • Vehicular anti-lock control system
    • 车载防抱死控制系统
    • US20070114839A1
    • 2007-05-24
    • US11592015
    • 2006-11-02
    • Yuki ItoOsamu YamamotoNaoto OhkuboHiromi Inagaki
    • Yuki ItoOsamu YamamotoNaoto OhkuboHiromi Inagaki
    • B60T13/70
    • B60T8/17616B60T2210/12B60T2240/06
    • A vehicular anti-lock control system includes: a ground load calculation section for detecting or estimating a ground load of a wheel; a road surface friction coefficient calculation section for detecting or estimating a road surface friction coefficient; and a reference fluid pressure calculation section for calculating an upper side reference fluid pressure and a lower side reference fluid pressure in anti-lock control based on the ground load and the friction coefficient. The upper and lower side reference fluid pressures are respectively determined to be an upper limit value and a lower limit value of a fluid pressure in anti-lock control. Therefore, it is possible to suppress the amount of change in the fluid pressure during anti-lock control, thus improving the braking effect and the braking feel.
    • 车辆防抱死控制系统包括:地面载荷计算部分,用于检测或估计车轮的地面载荷; 用于检测或估计路面摩擦系数的路面摩擦系数计算部; 以及参考流体压力计算部分,用于基于地面载荷和摩擦系数计算防抱死控制中的上侧参考流体压力和下侧参考流体压力。 上下参考流体压力分别被确定为防锁控制中的流体压力的上限值和下限值。 因此,可以抑制防抱死控制期间的流体压力的变化量,从而提高制动效果和制动感觉。