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24 条记录 (耗时 0.024 秒)

    ENVELOPE TRACKING POWER SUPPLY CIRCUIT AND HIGH-FREQUENCY AMPLIFIER INCLUDING ENVELOPE TRACKING POWER SUPPLY CIRCUIT
    2.
    发明申请
    ENVELOPE TRACKING POWER SUPPLY CIRCUIT AND HIGH-FREQUENCY AMPLIFIER INCLUDING ENVELOPE TRACKING POWER SUPPLY CIRCUIT 失效
    安全跟踪电源电路和高频放大器，包括环绕跟踪电源电路

    公开(公告)号：US20110031953A1

    公开(公告)日：2011-02-10

    申请号：US12866676

    申请日：2009-02-03

    申请人： Akihiro Kanbe ,  Masato Kaneta ,  Haruo Kobayashi ,  Hitoshi Hirata ,  Tatsuhiro Shimura

    发明人： Akihiro Kanbe ,  Masato Kaneta ,  Haruo Kobayashi ,  Hitoshi Hirata ,  Tatsuhiro Shimura

    IPC分类号： G05F3/02

    CPC分类号： H03F1/0227 ,  H02M2001/0045 ,  H03F3/189 ,  H03F3/245 ,  H03F2200/102 ,  H03F2200/195 ,  H03F2200/451 ,  Y02B70/1483

    摘要： The invention aims to maintain a high efficiency even for a high-frequency signal having a wideband envelope. The envelope tracking power supply circuit 5 is a power supply circuit for generating an output voltage according to the envelope of a high frequency signal and comprises a voltage follower circuit 7 for receiving an envelope signal and outputting a voltage according to the envelope signal SE; two parallel resistors Rsense connected in parallel between the output of the voltage follower circuit 7 and an output terminal PO; hysteresis comparators 9a, 9b for detecting respective voltage drops in the parallel resistors Rsense and generating voltages according to the voltage drops; and switching converters 11a, 11b for performing switching according to the respective voltages outputted from the hysteresis comparators 9a, 9b and outputting a voltage to the output terminal PO.

    摘要翻译： 本发明的目的在于即使对于具有宽带信封的高频信号也能保持高效率。 信封跟踪电源电路5是用于根据高频信号的包络产生输出电压的电源电路，并且包括用于接收包络信号并根据包络信号SE输出电压的电压跟随器电路7; 在电压跟随器电路7的输出端和输出端子PO之间并联连接的两个并联电阻器Rsense; 磁滞比较器9a，9b，用于检测并联电阻Rsense中的各个电压降，并根据电压降产生电压; 以及用于根据从迟滞比较器9a，9b输出的各个电压进行切换的开关转换器11a，11b，并向输出端子PO输出电压。

    Detector for sub signal of modulated AM stereophonic signal
    3.
    发明授权
    Detector for sub signal of modulated AM stereophonic signal 失效
    调制AM立体声信号的子信号检测器

    公开(公告)号：US4404428A

    公开(公告)日：1983-09-13

    申请号：US232270

    申请日：1981-02-06

    申请人： Hitoshi Hirata ,  Akira Nishioka

    发明人： Hitoshi Hirata ,  Akira Nishioka

    IPC分类号： H04H1/00 ,  H04H40/36 ,  H04H5/00

    CPC分类号： H04H20/49 ,  H04H40/36

    摘要： 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.

    摘要翻译： 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。

    Quadrature receiver
    4.
    发明授权
    Quadrature receiver 失效
    正交接收机

    公开(公告)号：US4273958A

    公开(公告)日：1981-06-16

    申请号：US98284

    申请日：1979-11-28

    申请人： Hitoshi Hirata

    发明人： Hitoshi Hirata

    IPC分类号： H03L7/06 ,  H04H1/00 ,  H04H40/36 ,  H04H5/00

    CPC分类号： H04H20/49

    摘要： A quadrature receiver circuit in which the output frequency of a local oscillator is controlled to follow the free-running frequency of a voltage-controlled oscillator so that accurate four-phase demodulation is maintained independent of oscillator drift. The output control voltage of a phase comparator in a phase-locked loop circuit in the demodulator is coupled through a low-pass filter and a DC amplifier to the frequency control input of a voltage controlled local oscillator.

    摘要翻译： 一个正交接收器电路，其中本地振荡器的输出频率被控制为跟随压控振荡器的自由运行频率，从而保持与振荡器漂移无关的精确的四相解调。 解调器中的锁相环电路中的相位比较器的输出控制电压通过低通滤波器和直流放大器耦合到压控本地振荡器的频率控制输入端。

    External fixator
    5.
    发明授权
    External fixator 失效
    外固定器

    公开(公告)号：US08366710B2

    公开(公告)日：2013-02-05

    申请号：US12302438

    申请日：2007-05-25

    申请人： Hitoshi Hirata ,  Masahiro Tatebe ,  Takaaki Shinohara

    发明人： Hitoshi Hirata ,  Masahiro Tatebe ,  Takaaki Shinohara

    IPC分类号： A61B17/00

    CPC分类号： A61B17/6466 ,  A61B17/6416 ,  A61B17/645 ,  A61B17/66

    摘要： 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.

    摘要翻译： 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。

    DIRECTIONAL COUPLER AND WIRELESS COMMUNICATION APPARATUS COMPRISING THEREOF
    6.
    发明申请
    DIRECTIONAL COUPLER AND WIRELESS COMMUNICATION APPARATUS COMPRISING THEREOF 审中-公开
    方向耦合器及其无线通信装置

    公开(公告)号：US20110273242A1

    公开(公告)日：2011-11-10

    申请号：US13144353

    申请日：2009-01-19

    申请人： Kazuyuki Totani ,  Hitoshi Hirata

    发明人： Kazuyuki Totani ,  Hitoshi Hirata

    IPC分类号： H01P5/18 ,  H01P3/08

    CPC分类号： H01P5/185

    摘要： The present invention relates to a directional coupler 1 structured with a microstripline 20 including a main line 2 having an input port P1 and an output port P2, and a sub line 3 having a coupling port P3 and an isolation port P4. The sub line 3 is made of a high impedance line 4 narrower than the main line 2. The high impedance line 4 has first coupling lines 5A and 5B and a second coupling line 6 each extending in parallel to the main line 2. The distance between the first coupling lines 5A and 5B and the main line 2 is smaller than the distance between the second coupling line 6 and the main line 2.

    摘要翻译： 本发明涉及一种定向耦合器1，其由包括具有输入端口P1和输出端口P2的主线路2的微带线20和具有耦合端口P3和隔离端口P4的子线路3构成。 子线3由比主线2窄的高阻抗线4制成。高阻抗线4具有平行于主线2延伸的第一耦合线5A和5B以及第二耦合线6。 第一耦合线5A和5B以及主线2小于第二耦合线6和主线2之间的距离。

    Audio signal modulating system with pre-emphasis
    7.
    发明授权
    Audio signal modulating system with pre-emphasis 失效
    具有预加重功能的音频信号调制系统

    公开(公告)号：US5448757A

    公开(公告)日：1995-09-05

    申请号：US222365

    申请日：1994-04-04

    申请人： Hitoshi Hirata

    发明人： Hitoshi Hirata

    IPC分类号： H04B1/20 ,  H04B1/00

    CPC分类号： H04B1/20

    摘要： An FM audio system has an FM tuner, a CD player, a stereo modulator for modulating an audio signal from the CD player to produce a composite signal so as to be received by the FM tuner for reproducing the audio signal. A control circuit such as an automatic level controller is provided for controlling a level of the audio signal applied to the stereo modulator to such a level as to prevent tone quality of sound reproduced by the FM tuner from deteriorating.

    摘要翻译： FM音频系统具有FM调谐器，CD播放器，用于调制来自CD播放器的音频信号的立体声调制器，以产生复合信号，以便由FM调谐器接收以再现音频信号。 提供了诸如自动电平控制器的控制电路，用于将施加到立体声调制器的音频信号的电平控制到防止FM调谐器再现的声音的音质劣化的程度。

    Muting circuit for AM stereophonic receiver
    8.
    发明授权
    Muting circuit for AM stereophonic receiver 失效
    AM立体声接收机的静音电路

    公开(公告)号：US4490838A

    公开(公告)日：1984-12-25

    申请号：US513788

    申请日：1983-07-15

    申请人： Akira Nishioka ,  Hitoshi Hirata

    发明人： Akira Nishioka ,  Hitoshi Hirata

    IPC分类号： H03G3/34 ,  H04B1/10 ,  H04B1/16 ,  H04H1/00 ,  H04H40/36 ,  H04H5/00

    CPC分类号： H04H40/36 ,  H03G3/344 ,  H04B1/10 ,  H04B1/1661

    摘要： A muting circuit for an AM stereophonic receiver of the type that having a detector circuit operating upon an AM stereophonic signal, the carrier of which is phase-modulated by the difference signal of first and second stereo channel signals, for detecting the difference signal. The muting circuit includes a muting signal generating circuit for detecting the output level of the detector circuit exceeding a predetermined value and for generating a muting signal at least for periods when the predetermined value is exceeded, and a muting switch circuit for attenuating the output of the detector in response to the muting signal.

    摘要翻译： 一种用于AM立体声接收机的静噪电路，其具有检测电路，其操作在AM立体声信号上，其载波由第一和第二立体声声道信号的差分信号进行相位调制，用于检测差分信号。 静音电路包括：静噪信号发生电路，用于检测超过预定值的检测器电路的输出电平，并至少在超过预定值的时段产生静音信号;以及静噪开关电路，用于衰减 检测器响应静音信号。

    Stereo pilot signal eliminating circuit for AM stereophonic receiver
    9.
    发明授权
    Stereo pilot signal eliminating circuit for AM stereophonic receiver 失效
    AM立体声接收机的立体声导频信号消除电路

    公开(公告)号：US4409436A

    公开(公告)日：1983-10-11

    申请号：US274562

    申请日：1981-06-17

    申请人： Tatsuo Numata ,  Akira Nishioka ,  Hitoshi Hirata

    发明人： Tatsuo Numata ,  Akira Nishioka ,  Hitoshi Hirata

    IPC分类号： H04H1/00 ,  H04H40/36 ,  H04H5/00

    CPC分类号： H04H20/49

    摘要： 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.

    摘要翻译： 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。