公开(公告)号：US5353311A

公开(公告)日：1994-10-04

申请号：US2147

申请日：1993-01-11

Applicant: Minoru Hirata ,  Osamu Yamamoto

Inventor： Minoru Hirata ,  Osamu Yamamoto

IPC: H03L7/18 ,  H03L7/23 ,  H04B1/7136 ,  H04K1/00

CPC classification number: H04B1/7136 ,  H03L7/1806 ,  H03L7/23 ,  H04B2001/71365

Abstract: A radio transmitter suitable for a frequency hopping communication system which transmits a phase modulated signal with a minimum of spurious signals and phase noise. A direct digital frequency synthesizer (DDS) generates a frequency hopping signal lying in the VHF band. A first phase locked oscillator reduces the spurious components of the frequency hopping signal to produce a corresponding signal lying in the UHF band. This UHF band signal is used as a reference signal for a second phase locked oscillator which sends the phase modulated signal via a voltage controlled oscillator (VCO) built therein. The second phase locked oscillator includes a modulator for further modulating the phase of the phase modulated signal or a frequency divided version thereof by a modulating signal. The output of the modulator is used as a signal to be compared by a phase comparator or a source of signal to be compared. Since the second phase locked oscillator has a phase locked loop band sufficiently broader than the signal band of the modulating signal, it not only generates the phase modulated signal capable of sufficiently following the modulating signal, but also suppresses phase noise of the phase modulated signal ascribable to the VCO.

Abstract translation: 一种适用于跳频通信系统的无线电发射机，其发射具有最小寄生信号和相位噪声的相位调制信号。 直接数字频率合成器（DDS）产生位于VHF频带中的跳频信号。 第一锁相振荡器减少跳频信号的杂散分量以产生位于UHF频带中的对应信号。 该UHF频带信号用作通过内置压控振荡器（VCO）发送相位调制信号的第二锁相振荡器的参考信号。 第二锁相振荡器包括用于通过调制信号进一步调制相位调制信号的相位或其分频版本的调制器。 调制器的输出用作要被比较的相位比较器或要比较的信号源的信号。 由于第二锁相振荡器具有比调制信号的信号频带宽的锁相环带，所以不仅产生能够充分跟随调制信号的相位调制信号，还抑制相位调制信号的相位噪声 到VCO。

公开(公告)号：US5309001A

公开(公告)日：1994-05-03

申请号：US980666

申请日：1992-11-24

Applicant: Masanori Watanabe ,  Mitsuhiro Matsumoto ,  Hiroshi Nakatsu ,  Tadashi Takeoka ,  Osamu Yamamoto ,  Kazuaki Sasaki

Inventor： Masanori Watanabe ,  Mitsuhiro Matsumoto ,  Hiroshi Nakatsu ,  Tadashi Takeoka ,  Osamu Yamamoto ,  Kazuaki Sasaki

IPC: H01L33/38 ,  H01L33/00

CPC classification number: H01L33/385 ,  H01L33/38 ,  H01L33/20 ,  H01L33/24

Abstract: A surface electrode on a surface of a LED has a pad, and further, at least first-order branches linearly extending from the pad, second-order branches diverged and linearly extending from the first-order branches, and third-order branches diverged and linearly extending from the second-order branches. The pad out of the surface electrode is not in electrical contact with a underlying semiconductor layer, whereas the surface electrode and the semiconductor layer are in electrical contact with each other at ends of the highest-order branches. Also, the semiconductor layer is provided along a pattern of the surface electrode in a mesa shape. Thus, ineffective light emission underneath the surface electrode is relatively reduced so that external quantum efficiency can be improved, and moreover even shorter-wavelength light can be allowed to go out at high efficiency by omitting a current diffusion layer.

Abstract translation: LED的表面上的表面电极具有焊盘，并且至少一级从焊盘线性延伸的分支，二阶分支从一级分支发散并线性延伸，三阶分支发散， 从二阶分支线性延伸。 表面电极中的焊盘不与下面的半导体层电接触，而表面电极和半导体层在最高级分支的端部彼此电接触。 而且，半导体层沿着台面形状的表面电极的图案设置。 因此，表面电极下方的无效光发射相对减少，从而可以提高外部量子效率，而且通过省略电流扩散层，甚至可以通过高效率地允许更短波长的光线出射。

公开(公告)号：US5181175A

公开(公告)日：1993-01-19

申请号：US611573

申请日：1990-11-13

Applicant: Shuji Shiraishi ,  Osamu Yamamoto

Inventor： Shuji Shiraishi ,  Osamu Yamamoto

IPC: F02D41/04 ,  B60K28/16 ,  F02D29/02 ,  F02D45/00

CPC classification number: B60K28/16

Abstract: Drive wheel slip control system for a vehicle includes means for setting a reference value for slippage of a drive wheel providing an appropriate slip condition, means for reducing the drive wheel torque when the slippage exceeds the reference value, means for detecting the opening degree of an accelerator of a prime mover which drives the drive wheel, and means for correcting the reference value dependent on signals from the detecting means. The vehicle responds to accelerator operation even during control of the drive wheel slip, enabling a sporty travel.

Abstract translation: 用于车辆的驱动轮滑移控制系统包括用于设置提供适当滑动状态的驱动轮的滑动的参考值的装置，用于当滑动超过参考值时减小驱动轮扭矩的装置，用于检测打开程度的装置 驱动驱动轮的原动机的加速器，以及取决于来自检测装置的信号的基准值的校正装置。 即使在驱动轮滑动控制期间，车辆也会响应加速器操作，从而实现运动。

公开(公告)号：US5180685A

公开(公告)日：1993-01-19

申请号：US678834

申请日：1991-04-02

Applicant: Osamu Yamamoto ,  Hidenori Kawanishi

Inventor： Osamu Yamamoto ,  Hidenori Kawanishi

IPC: H01S5/00 ,  H01S5/02 ,  H01S5/028 ,  H01S5/16

CPC classification number: H01L33/0062 ,  H01S5/028 ,  H01S5/164 ,  H01S5/0202 ,  H01S5/0281 ,  Y10S148/072 ,  Y10S148/095

Abstract: There is provided a method for the production of a semiconductor laser device which emits laser light from an end facet thereof. This method comprises the steps of: forming a multi-layered structure including an active layer for laser oscillation on a semiconductor substrate; etching the semiconductor substrate and the multi-layered structure to form a pluralilty of striped grooves parallel to each other in such a manner that a plurality of projections are formed on the side face of the multi-layered structure in the striped grooves; separating the projections from the multi-layered structure to form a pair of cleavage planes each functioning as a resonator facet; forming a large-band-gap layer on at least one of the cleavage planes on the light-emitting side, the large-band-gap layer having a larger band gap than that of the active layer; forming a reflecting film on the large-band-gap layer; and finally cleaving the semiconductor substrate and the multi-layered structure to obtain a plurality of semiconductor laser devices.

公开(公告)号：US5109462A

公开(公告)日：1992-04-28

申请号：US577651

申请日：1990-09-05

Applicant: Masanori Watanabe ,  Osamu Yamamoto ,  Toshihiko Yoshida

Inventor： Masanori Watanabe ,  Osamu Yamamoto ,  Toshihiko Yoshida

IPC: G02F1/37 ,  G02F1/377

CPC classification number: G02F1/377 ,  G02F2001/374

Abstract: A light wavelength converter which includes a light source for emitting fundamental waves having a desired wavelength, a first loop-shaped optical waveguide for converting the fundemental waves into harmonics, and a second optical waveguide for receiving the light from the source, wherein the two waveguides are coupled by an optical directional coupler.

公开(公告)号：US5046802A

公开(公告)日：1991-09-10

申请号：US498573

申请日：1990-03-26

Applicant: Osamu Yamamoto ,  Toshihiko Yoshida

Inventor： Osamu Yamamoto ,  Toshihiko Yoshida

IPC: G02B6/12 ,  G02F1/35 ,  G02F1/37 ,  G02F1/377 ,  G02F1/39

CPC classification number: G02F1/377 ,  G02F1/3534 ,  G02F2001/374

Abstract: A light wavelength converter comprising a substrate that is made of a material with a non-linear optical effect, and a loop-shaped optical waveguide that is formed on the substrate, whereby a second harmonic wave or a sum wave emanates from a fundamental wave that has been propagated in a specific area of the optical waveguide and part of the fundamental wave that has not been converted to the second harmonic wave or the sum wave is returned to the specific area of the optical waveguide, so that a fundamental wave with a relatively low output can be efficiently converted to a second harmonic wave and a high-output second harmonic wave can be obtained.

公开(公告)号：US5001637A

公开(公告)日：1991-03-19

申请号：US385517

申请日：1989-07-27

Applicant: Shuji Shiraishi ,  Osamu Yamamoto ,  Hironobu Kiryu

Inventor： Shuji Shiraishi ,  Osamu Yamamoto ,  Hironobu Kiryu

IPC: B62D6/04 ,  B62D15/02

CPC classification number: B62D6/04 ,  B62D15/02

Abstract: A steering wheel turning angle detector for a vehicle, includes a steering wheel turning angle sensor attached to a steering wheel for detecting a steering wheel turning angle, a yaw rate detector for detecting a yaw rate of the vehicle, a steering wheel turning angle prediction circuit, receiving an output from the yaw rate detecting means for predicting the steering wheel turning angle in response to the detected yaw rate, and a steering wheel turning angle correcting circuit, receiving output signals from the steering wheel turning angle sensor and the steering wheel angle prediction circuit, for correcting an output value of the steering wheel turning angle sensor in response to an error between outputs from the steering wheel turning angle sensor and the steering wheel turning angle prediction circuit.

公开(公告)号：US4817109A

公开(公告)日：1989-03-28

申请号：US937969

申请日：1986-12-04

Applicant: Nobuybuki Miyauchi ,  Osamu Yamamoto ,  Hiroshi Hayashi ,  Saburo Yamamoto ,  Shigeki Maei

Inventor： Nobuybuki Miyauchi ,  Osamu Yamamoto ,  Hiroshi Hayashi ,  Saburo Yamamoto ,  Shigeki Maei

IPC: H01S5/022 ,  H01S5/0683 ,  H01S5/14 ,  H01S3/08

CPC classification number: H01S5/14 ,  H01S5/02252 ,  H01S3/08068 ,  H01S5/0683

Abstract: An external resonator type semiconductor laser apparatus comprising a semiconductor laser device, a reflector positioned behind said laser device in a manner to face the light-emitting rear facet of said laser device, and a photodetector, for detecting the optical output of said laser device, positioned backward of said reflector, wherein a part of the laser light from said light-emitting rear facet is reflected by said reflector and the reflected light is then incident to said photodetector.

Abstract translation: 一种外部谐振器型半导体激光装置，包括半导体激光装置，位于所述激光装置后面的反射器，面向所述激光装置的发光后面，以及用于检测所述激光装置的光输出的光电检测器， 位于所述反射器的后方，其中来自所述发光后小面的激光的一部分被所述反射器反射，然后所述反射光入射到所述光电检测器。

公开(公告)号：US4803440A

公开(公告)日：1989-02-07

申请号：US97845

申请日：1987-09-16

Applicant: Toshinori Hotta ,  Osamu Yamamoto

Inventor： Toshinori Hotta ,  Osamu Yamamoto

IPC: G05F1/66 ,  H03G3/20

CPC classification number: H03G3/3047

Abstract: A power control circuit comprises a signal input, a controllable attenuator, an amplifier, an output, a power detector, a reference circuit, a comparator, an external control input, an error detector, and a controller. The comparator, error detector, and controller are digital circuits realized by a microprocessor. The attenuator is between the signal input and the input to the amplifier to regulate the amplifier's output. The power detector couples to the amplifier output to generate a measurement signal representing the power at the output. The reference circuit generates a reference signal representing a predetermined minimum output when the signal input is nonzero. The comparator compares the measurement and reference signals and generates a decision signal indicating if the signal input is nonzero. The external control input receives an external control signal. The error detector is coupled to the power detector and the external control input and computes the difference between the external control signal and the measurement signal. When the measurement signal is at or above the minimum power, the controller provides an integral of the computed difference to control the variable attenuator. When the measurement signal is below the minimum power, the controller keeps the attenuator at a prior constant value.

Abstract translation: 功率控制电路包括信号输入端，可控衰减器，放大器，输出端，功率检测器，参考电路，比较器，外部控制输入端，误差检测器和控制器。 比较器，误差检测器和控制器是由微处理器实现的数字电路。 衰减器在信号输入和放大器的输入之间，以调节放大器的输出。 功率检测器耦合到放大器输出以产生表示输出端的功率的测量信号。 当信号输入不为零时，参考电路产生表示预定最小输出的参考信号。 比较器比较测量和参考信号，并产生指示信号输入是否为非零的判定信号。 外部控制输入接收外部控制信号。 误差检测器耦合到功率检测器和外部控制输入端，并计算出外部控制信号与测量信号之间的差异。 当测量信号处于或超过最小功率时，控制器提供所计算的差值的积分以控制可变衰减器。 当测量信号低于最小功率时，控制器将衰减器保持在先前的恒定值。

公开(公告)号：US4794257A

公开(公告)日：1988-12-27

申请号：US610805

申请日：1984-05-16

Applicant: Sueki Baba ,  Osamu Yamamoto ,  Tadaoki Yamashita ,  Hiroshi Tsutsui

Inventor： Sueki Baba ,  Osamu Yamamoto ,  Tadaoki Yamashita ,  Hiroshi Tsutsui

IPC: A61B6/00 ,  A61B6/03 ,  G01T1/29 ,  H05G1/26 ,  G01T1/24

CPC classification number: A61B6/4441 ,  A61B6/032 ,  A61B6/06 ,  A61B6/4078 ,  A61B6/4241 ,  G01T1/2928 ,  H05G1/26

Abstract: A radiation quantum-counting method and apparatus for producing high resolution radiographic images capable of discriminating soft tissue cancer having a lcm size. The high resolution image is generated by a plurality of radiation sensitive elements, each element including a semiconductor material having a pair of electrodes mounted on opposite faces thereof. Each element is highly sensitive and produces a rapid pulse count since the thickness of the semiconductor material is substantially 0.1-0.5 mm, and the semiconductor material has an effective atomic number greater than 30 and an energy band gap greater than 1.3 eV. As a plurality of radiation quanta emanate from the radiation source, they are received by the plurality of radiation sensitive elements which detect individual radiation quantum and produce a pulse signal for each detected quantum. Coupled to each radiation sensitive element is a pulse amplifier for amplifying the pulse signals. The amplified pulse signals are counted and used to produce radiographic image signals containing details of image gradation. The pulse count may also be stored in a memory and used to provide two-dimensional information when combined with other pulse count data derived when the spatial orientation between the objective body and the radiation source is changed.

Abstract translation: 一种用于产生能够区分具有lcm尺寸的软组织癌的高分辨率放射照相图像的辐射量子计数方法和装置。 高分辨率图像由多个辐射敏感元件产生，每个元件包括具有安装在其相对面上的一对电极的半导体材料。 由于半导体材料的厚度大致为0.1-0.5mm，所以每个元件都是高灵敏度的并且产生快速的脉冲计数，并且半导体材料具有大于30的有效原子序数和大于1.3eV的能带隙。 作为从辐射源发出的多个辐射量子，它们被检测各个辐射量子的多个辐射敏感元件接收，并产生每个检测到的量子的脉冲信号。 耦合到每个辐射敏感元件是用于放大脉冲信号的脉冲放大器。 对放大的脉冲信号进行计数并用于产生包含图像灰度细节的放射线图像信号。 当与目标体和辐射源之间的空间取向改变时导出的其他脉冲计数数据组合时，脉冲计数也可以存储在存储器中并用于提供二维信息。