公开(公告)号：US5014349A

公开(公告)日：1991-05-07

申请号：US397451

申请日：1989-08-14

申请人： Kazuhiko Kubo ,  Akira Usui ,  Seiji Sakashita ,  Hiroaki Ozeki ,  Ippei Kanno

发明人： Kazuhiko Kubo ,  Akira Usui ,  Seiji Sakashita ,  Hiroaki Ozeki ,  Ippei Kanno

IPC分类号： H04B1/26 ,  H03D7/16 ,  H03J5/24 ,  H04N7/20

CPC分类号： H03D7/161 ,  H03J5/242 ,  H04N7/20

摘要： The invention relates to a television receiving tuner for receiving television signals of VHF band/UHF band, a CATV signal, and a satellite television broadcasting signal. As a circuit for receiving the television signals of the VHF band/UHF band and the CATV signal as a first input signal, there is provided a double super type tuner of the up/down converter system including a first local oscillator (6) and a first mixer (5) which construct an up converter and a second local oscillator (10) and a second mixer (9) which construct a down converter. When the satellite television broadcasting signal as a second input signal is received, the first local oscillator (6) and the first mixer (5) in the up converter section are switched by switching circuits (12, 13) and used as a down converter. At least the first local oscillator (6) and the first mixer (5) are commonly used both for reception of the television signals of the VHF band/UHF band and the CATV signal and for reception of the satellite television broadcasting signal, thereby accomplishing the simplification of the construction and the low costs.

摘要翻译： PCT No.PCT / JP88 / 01313 Sec。 371日期1989年8月14日 102（e）日期1989年8月14日PCT提交1988年12月23日PCT公布。 出版物WO89 / 06072 日期：1989年6月29日。本发明涉及一种用于接收VHF频带/ UHF频带的电视信号，CATV信号和卫星电视广播信号的电视接收调谐器。 作为用于接收VHF频带/ UHF频带的电视信号和CATV信号作为第一输入信号的电路，提供了一种上/下变换器系统的双超型调谐器，包括第一本地振荡器（6）和 第一混频器（5），其构造升压转换器和构成下变频器的第二本地振荡器（10）和第二混频器（9）。 当接收到作为第二输入信号的卫星电视广播信号时，上变频器部分中的第一本地振荡器（6）和第一混频器（5）由开关电路（12,13）切换并用作下变频器。 至少第一本地振荡器（6）和第一混频器（5）通常用于接收VHF频带/ UHF频带的电视信号和CATV信号，并且用于接收卫星电视广播信号，从而完成 简化施工和低成本。

公开(公告)号：US5179729A

公开(公告)日：1993-01-12

申请号：US481563

申请日：1990-02-20

申请人： Akira Mishima ,  Kazuhiko Kubo ,  Akira Usui

发明人： Akira Mishima ,  Kazuhiko Kubo ,  Akira Usui

IPC分类号： H03B21/02 ,  H03D7/16 ,  H03J5/02 ,  H04N5/50

CPC分类号： H04N5/50 ,  H03D7/163 ,  H03J5/0272 ,  H03B21/02

摘要： A tuner station apparatus includes a first mixer for combining an input signal and a first local oscillation signal, and a second mixer for combining an output of the first mixer and a second local oscillation signal. The first and second local oscillation signals are generated by first and second PLL circuits, respectively. Each of the first and second PLL circuits include a frequency divider, a variable frequency divider, a phase comparator, a low pass filter, and a voltage controlled oscillator. The frequency divider of the first PLL circuit has a higher frequency division ratio than that of the second PLL circuit.

公开(公告)号：US4806876A

公开(公告)日：1989-02-21

申请号：US99001

申请日：1987-09-21

申请人： Akira Usui ,  Seiji Sakashita ,  Kiyotake Fukui ,  Hiroyuki Nagai

发明人： Akira Usui ,  Seiji Sakashita ,  Kiyotake Fukui ,  Hiroyuki Nagai

IPC分类号： H03G1/04 ,  H03G3/10 ,  H03G3/30

CPC分类号： H03G1/04 ,  H03G3/10

摘要： A high frequency amplifier circuit based on an amplifying transistor, e.g. a dual-gate FET, having an A.G.C. voltage applied to a control terminal thereof to control the transistor DC operating current, has a diode connected between an input electrode of the transistor and a source of an input high frequency signal. All or part of the DC operating current of the transistor is passed through the diode as the operating current of the diode to thereby produce a high degree of attenuation by the diode when the transistor current level is small, so that reduced cross modulation interference is produced by the transistor when a high degree of gain reduction is executed by A.G.C. control.

摘要翻译： 基于放大晶体管的高频放大器电路，例如， 双栅极FET，具有A.G.C. 施加到其控制端的电压以控制晶体管的DC工作电流，二极管连接在晶体管的输入电极和输入高频信号的源极之间。 晶体管的全部或部分直流工作电流作为二极管的工作电流通过二极管，从而在晶体管电流水平较小时由二极管产生高度的衰减，从而产生减小的交叉调制干扰 通过AGC执行高增益减小时的晶体管 控制。

公开(公告)号：US07829913B2

公开(公告)日：2010-11-09

申请号：US10519152

申请日：2003-06-26

申请人： Masatomo Shibata ,  Yuichi Oshima ,  Takeshi Eri ,  Akira Usui ,  Haruo Sunagawa

发明人： Masatomo Shibata ,  Yuichi Oshima ,  Takeshi Eri ,  Akira Usui ,  Haruo Sunagawa

IPC分类号： H01L27/01

CPC分类号： C30B29/406 ,  C30B25/02 ,  C30B25/18 ,  C30B29/403 ,  H01L21/0242 ,  H01L21/02439 ,  H01L21/02458 ,  H01L21/02491 ,  H01L21/02502 ,  H01L21/02513 ,  H01L21/0254 ,  H01L21/0262

摘要： A structure of a substrate used for growing a crystal layer of a semiconductor, particularly a group-III nitride semiconductor and its manufacturing method. The substrate comprises two porous layers on a base. The mean opening diameter of the pores of the first porous laser, the outermost layer, is smaller than the means diameter of the pores in the second porous layer nearer to the base than the first porous layer. The first and second porous layers have volume porosities of 10 to 90%. More then 50% of the pores of the first porous layer extend from the surface of the first porous layer and reach the interface between the first and second porous layers. Even by a conventional crystal growing method, an epitaxial crystal of low defect density can be easily grown on the porous substrate.

摘要翻译： 用于生长半导体的晶体层的衬底的结构，特别是III族氮化物半导体及其制造方法。 基底在基底上包括两个多孔层。 第一多孔激光器（最外层）的孔的平均开口直径小于第二多孔层中比第一多孔层更靠近基底的孔的平均直径。 第一和第二多孔层的体积孔隙率为10〜90％。 多于50％的第一多孔层的孔从第一多孔层的表面延伸并到达第一和第二多孔层之间的界面。 即使通过常规的晶体生长方法，可以容易地在多孔基材上生长低缺陷密度的外延晶体。

公开(公告)号：US20070036366A1

公开(公告)日：2007-02-15

申请号：US10572831

申请日：2004-09-24

申请人： Yusuke Konagai ,  Akira Usui

发明人： Yusuke Konagai ,  Akira Usui

IPC分类号： H03G3/00

CPC分类号： H04S7/307 ,  H04R3/12 ,  H04R2203/12 ,  H04S3/00

摘要： An audio characteristic correction system adapted to an audio surround system in which a sound emitted from a directional speaker (an array speaker) is reflected on a wall surface or a sound reflection board so as to create a virtual speaker, at least one of frequency-gain characteristics, frequency-phase characteristics, and gain of an audio signal input to the directional speaker is corrected such that the sound reflected on the wall surface or the sound reflection board has desired audio characteristics at a desired listening position.

摘要翻译： 一种适于音频环绕系统的音频特性校正系统，其中从定向扬声器（阵列扬声器）发出的声音被反射在壁表面或声音反射板上，以便产生虚拟扬声器， 校正输入到定向扬声器的音频信号的增益特性，频率相位特性和增益，使得反射在壁表面或声音反射板上的声音在期望的收听位置具有期望的音频特性。

公开(公告)号：US20070019831A1

公开(公告)日：2007-01-25

申请号：US10558542

申请日：2004-06-01

申请人： Akira Usui

发明人： Akira Usui

IPC分类号： H04R5/02

CPC分类号： H04S3/008 ,  H04R1/403 ,  H04R3/12 ,  H04R2205/022 ,  H04R2430/20 ,  H04R2499/15 ,  H04S3/00

摘要： In an array speaker system that performs multi-channel reproduction using an array speaker constituted by arraying a plurality of speaker units in a matrix manner, a left channel signal, a right channel signal, and a center channel signal, all of which instruct reproduction of sound at a front side of a listener, are subjected to weighting using weight coefficients based on a Bessel function so as to drive the speaker units, thus realizing spherical sound emission characteristics. In addition, a surround left channel signal and a surround right channel signal, both of which instruct reproduction of sound at a rear side of the listener, are subjected to beam processing, whereby sound is reflected on a sound reflection position such as a wall surface or a ceiling and is then emitted in the form of a sound beam reaching the rear side of the listener.

摘要翻译： 在使用以矩阵方式排列多个扬声器单元构成的阵列扬声器进行多声道再现的阵列扬声器系统中，左声道信号，右声道信号和中心声道信号，均指示再现 使用基于贝塞尔函数的权重系数对收听者前方的声音进行加权，以驱动扬声器单元，从而实现球形声音发射特性。 此外，两个指示在收听者的后侧再现声音的环绕左声道信号和环绕右声道信号被进行光束处理，从而声音被反射在诸如壁面的声音反射位置 或天花板，然后以到达听者后侧的声束的形式发射。

公开(公告)号：US20060256979A1

公开(公告)日：2006-11-16

申请号：US10555907

申请日：2004-05-06

申请人： Akira Usui ,  Masao Noro

发明人： Akira Usui ,  Masao Noro

IPC分类号： H03G5/00

CPC分类号： H04R3/12 ,  H04R2203/12 ,  H04R2205/022 ,  H04S3/00

摘要： An array speaker system is constituted by a plurality of speaker units, which are equipped with weighting means respectively and to which weight coefficients based on a Bessel function are imparted. An input signal is transmitted through an all-pass filter whose phase rotates by 180° in high-frequency ranges and is then supplied to those of the speaker units whose weight coefficients have negative values. Thus, a signal of an inverse phase is output with respect to low-frequency ranges; hence, it is possible to avoid the deterioration of audio emission characteristics, and it is possible to avoid the occurrence of beams and comb shapes in audio emission characteristics with respect to signals of high-frequency ranges.

摘要翻译： 阵列扬声器系统由多个扬声器单元构成，扬声器单元分别配备有加权装置，并且基于贝塞尔函数赋予加权系数。 输入信号通过在高频范围内相位旋转180°的全通滤波器发送，然后提供给权重系数为负值的扬声器单元的信号。 因此，相对于低频范围输出反相信号; 因此，可以避免音频发射特性的劣化，并且可以避免相对于高频范围的信号发生音频发射特性中的波束和梳状形状。

公开(公告)号：US06980495B2

公开(公告)日：2005-12-27

申请号：US10600691

申请日：2003-06-20

申请人： Katsuichi Osakabe ,  Akira Usui ,  Shinji Aoshima ,  Hiromitsu Shibata ,  Masaki Dojun

发明人： Katsuichi Osakabe ,  Akira Usui ,  Shinji Aoshima ,  Hiromitsu Shibata ,  Masaki Dojun

IPC分类号： G11B7/0045 ,  G11B7/00 ,  G11B7/007 ,  G11B7/085 ,  G11B7/09 ,  G11B7/095 ,  G11B7/125

CPC分类号： G11B7/24094 ,  G11B7/0045 ,  G11B7/08505 ,  G11B7/0903 ,  G11B7/0938

摘要： In an optical recording apparatus having an optical pickup, a rotating section is provided for rotating an optical disk which is formed thereon with a guide groove to define a spiral track having a plurality of rounds. The optical pickup has a light source for generating an optical beam and a diffractive grating for diffracting the optical beam to form a main beam and a pair of sub beams opposite with each other relative to the main beam. The optical pickup is operable for irradiating the main beam to the spiral track with accompanying the pair of the sub beams along apposite sides of the spiral track. A servo section operates the optical pickup to enable the main beam to trace the spiral track based on a tracking error signal derived from return lights of the sub beams reflected back from the optical disk. A recording section modulates the main beam for recording of information onto the spiral track while the optical dick is rotated. A control section controls recording of information each cycle the optical disk is rotated such that the recording of information is enabled to fill one round of the spiral track and disabled to blank another round of the spiral track so as to alternate the filled rounds and the blanked rounds.

摘要翻译： 在具有光学拾取器的光学记录装置中，提供旋转部分，用于使形成有导向槽的光盘旋转，以限定具有多个圆的螺旋轨道。 光拾取器具有用于产生光束的光源和衍射光栅，用于衍射光束以形成主光束和相对于主光束彼此相对的一对子光束。 光学拾取器可操作用于沿着螺旋形轨迹的相对侧伴随着该对子光束将主光束照射到螺旋形轨道。 伺服部分操作光学拾取器，以使得主光束能够基于从光盘反射回的子光束的返回光得到的跟踪误差信号来跟踪螺旋形轨迹。 当光学转盘旋转时，记录部分将用于记录信息的主光束调制到螺旋形轨道上。 控制部分控制信息的记录，每个周期旋转光盘，使得信息的记录能够填充一圈的螺旋轨迹并且被禁用以使另一轮的螺旋轨迹空白，以便交替填充的圆和被消隐的 回合。

公开(公告)号：US20050232105A1

公开(公告)日：2005-10-20

申请号：US10869293

申请日：2004-06-16

申请人： Yusuke Konagai ,  Akira Usui ,  Kentaro Nomoto

发明人： Yusuke Konagai ,  Akira Usui ,  Kentaro Nomoto

IPC分类号： G11B7/0045 ,  G11B7/007 ,  G11B20/12 ,  G11B20/14 ,  G11B27/19 ,  G11B27/24 ,  G11B27/30 ,  G11B5/09

CPC分类号： G11B27/24 ,  G11B7/0045 ,  G11B7/0079 ,  G11B20/1258 ,  G11B20/14 ,  G11B20/1403 ,  G11B27/034 ,  G11B27/30 ,  G11B27/3027 ,  G11B27/3036 ,  G11B27/3063 ,  G11B2020/1238 ,  G11B2020/1269 ,  G11B2020/1292 ,  G11B2220/216 ,  G11B2220/218 ,  G11B2220/2529 ,  G11B2220/2545 ,  G11B2220/2562

摘要： An optical disk recording apparatus operates on an optical disk having circular tracks which are provisionally written with an index signal used for securing a constant linear velocity of the optical disk from an innermost circular track to an outermost circular track, and records data along the circular tracks at different linear densities on different annular zones of the optical disk. In the apparatus, a disk drive section rotates the optical disk while synchronizing the index signal successively read from the rotated optical disk with a predetermined reference clock signal to thereby maintain the constant linear velocity of the circular tracks. A clock generating section multiples or divides the reference clock signal by different rates to generate different writing clock signals in correspondence to the different annular zones of the optical disk. A data recording section operates in synchronization to the different writing clock signals for recording data along the circular tracks at the different linear densities on the different annular zones.

摘要翻译： 光盘记录装置在具有圆形轨迹的光盘上操作，该光盘被暂时用用于将光盘的恒定线速度从最内圆周轨迹固定到最外圆周轨迹的索引信号临时写入，并且沿着圆形轨迹记录数据 在光盘的不同环形区域上以不同的线性密度。 在该装置中，磁盘驱动部分使得从旋转的光盘连续读取的索引信号与预定的参考时钟信号同步，从而保持圆形磁道的线速度恒定。 时钟产生部分对参考时钟信号进行倍增或分割，以便根据光盘的不同环形区域产生不同的写入时钟信号。 数据记录部分与不同的写入时钟信号同步操作，用于以不同环形区域上的不同线性密度沿圆形轨迹记录数据。

公开(公告)号：US06667252B2

公开(公告)日：2003-12-23

申请号：US10114057

申请日：2002-04-03

申请人： Takao Miyajima ,  Shigetaka Tomiya ,  Akira Usui

发明人： Takao Miyajima ,  Shigetaka Tomiya ,  Akira Usui

IPC分类号： H01L2126

CPC分类号： H01L21/02389 ,  C30B29/60 ,  C30B33/00 ,  H01L21/02378 ,  H01L21/0242 ,  H01L21/0254 ,  H01L21/0262 ,  H01L21/02639 ,  H01L21/02647 ,  Y10S438/94 ,  Y10S438/977

摘要： A compound semiconductor substrate is manufactured by forming a higher-quality compound semiconductor layer having a smaller number of crystalline defects on a single-crystal substrate, and removing the single-crystal substrate without causing damage to the compound semiconductor layer. The method comprises the steps of forming the compound semiconductor layer (first, second and third compound semiconductor layers) on the single-crystal substrate (sapphire substrate) through crystal growth so as to partially have a space between the compound semiconductor layer and the single-crystal substrate; and removing the compound semiconductor layer from the sapphire substrate by irradiating the compound semiconductor layer from a side of the sapphire substrate with a laser beam passing through the single-crystal substrate and being absorbed in the compound semiconductor layer to melt an interface between the single-crystal substrate and the compound semiconductor.