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    • 2. 发明授权
    • Detector for sub signal of modulated AM stereophonic signal
    • 调制AM立体声信号的子信号检测器
    • US4404428A
    • 1983-09-13
    • US232270
    • 1981-02-06
    • Hitoshi HirataAkira Nishioka
    • Hitoshi HirataAkira Nishioka
    • H04H1/00H04H40/36H04H5/00
    • H04H20/49H04H40/36
    • A detector for a modulated AM stereophonic signal of simple configuration in which the sub signal of the stereophonic signal is detected accurately independent of fluctuations in the frequency of the carrier signal. In the detector circuit, the output phase of a VCO in a PLL circuit which is fed with an amplitude limited signal corresponding to the output of an IF amplifier in the receiver is controlled by a variable phase shifter that performs phase shifting according to a control voltage. The phase-controlled output is used as a synchronous detection signal for sub signal detection. The control voltage is produced to correspond to the phase difference between the phase-controlled signal and the carrier signal of the received AM stereophonic signal.
    • 用于简单配置的调制AM立体声信号的检测器,其中立体声信号的子信号被准确地检测,与载波信号的频率的波动无关。 在检测器电路中,馈送有与接收机中的IF放大器的输出对应的限幅信号的PLL电路中的VCO的输出相位由可变移相器控制,该移相器根据控制电压进行相移 。 相位控制输出用作子信号检测的同步检测信号。 产生控制电压以对应于所接收的AM立体声信号的相位控制信号和载波信号之间的相位差。
    • 4. 发明授权
    • External fixator
    • 外固定器
    • US08366710B2
    • 2013-02-05
    • US12302438
    • 2007-05-25
    • Hitoshi HirataMasahiro TatebeTakaaki Shinohara
    • Hitoshi HirataMasahiro TatebeTakaaki Shinohara
    • A61B17/00
    • A61B17/6466A61B17/6416A61B17/645A61B17/66
    • An external fixator for fixing bones includes a coupling member, a plurality of ball joints, each ball joint comprising a pin to be inserted into a bone, a rotary member in form of a ball, a supporting member in which a first supporting member and a first thread for supporting the ball rotatably are formed, and a tubular fastening member that contains the ball and that has openings at the opposite ends, the tubular fastening member is provided at one end with a second thread corresponding to the first thread. The tubular fastening member is provided at the other end with a second supporting portion for pushing the ball against the first supporting portion when the second screw is driven into the first thread, wherein the pins and the coupling member are fixed to the supporting member and the rotary member.
    • 用于固定骨头的外部固定器包括联接构件,多个球接头,每个球窝接头包括插入骨头的销,球形的旋转构件,支撑构件,第一支撑构件和 形成用于支撑球的第一螺纹可旋转地形成,并且管状紧固构件包含球,并且在相对端具有开口,管状紧固构件在一端处设置有与第一螺纹对应的第二螺纹。 管状紧固件在另一端具有第二支撑部分,用于当第二螺钉被驱动到第一螺纹中时将球推向第一支撑部分,其中销和联接件固定到支撑件上, 旋转构件。
    • 8. 发明授权
    • Stereo pilot signal eliminating circuit for AM stereophonic receiver
    • AM立体声接收机的立体声导频信号消除电路
    • US4409436A
    • 1983-10-11
    • US274562
    • 1981-06-17
    • Tatsuo NumataAkira NishiokaHitoshi Hirata
    • Tatsuo NumataAkira NishiokaHitoshi Hirata
    • H04H1/00H04H40/36H04H5/00
    • H04H20/49
    • An AM stereophonic receiver including a stereophonic pilot signal eliminating circuit which substantially completely eliminates a pilot signal in an input stage of a matrix detector. A received AM stereophonic signal, of the type in which the carrier signal is phase-modulated with a sub-signal and amplitude modulated by a main signal, is coupled to a main signal detector and a sub-signal detector. The output of the sub-signal detector is coupled through a band amplifier which produces as an output a signal corresponding to the pilot signal contained in the stereophonic signal. The outputs of the sub-signal detector and main signal detector are coupled to inputs of adder/subtractor circuit in a matrix detector while the output of the band amplifier is also coupled thereto in a phase so as to cancel the pilot signal contained in the output of the sub-signal detector.
    • 一种AM立体声接收机,其包括基本上完全消除矩阵检测器的输入级中的导频信号的立体声导频信号消除电路。 接收到的AM立体声信号,其中载波信号用子信号进行相位调制并由主信号调幅的类型耦合到主信号检测器和子信号检测器。 子信号检测器的输出通过频带放大器耦合,该频带放大器产生对应于立体声信号中包含的导频信号的信号作为输出。 子信号检测器和主信号检测器的输出耦合到矩阵检测器中的加法器/减法器电路的输入,同时带通放大器的输出也以相位耦合到其中,以便消除输出中包含的导频信号 的子信号检测器。