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公开(公告)号：US5081431A
公开(公告)日：1992-01-14
申请号：US644614
申请日：1991-01-23
申请人： Kuichi Kubo , Tsutomu Yamakawa , Hiroshi Yoshida
发明人： Kuichi Kubo , Tsutomu Yamakawa , Hiroshi Yoshida
CPC分类号： H03L1/026 , H03B2201/0208 , H03L1/028
摘要： A digital temperature-compensated oscillator comprises a crystal oscillator, a first memory previously storing digital temperature compensation data obtained by previously measuring the relation between the ambient temperatures and the frequency deviations of the crystal oscillator, a second memory for storing frequency offset amounts of the oscillation frequency of the crystal oscillator, a temperature sensor for outputting analog detection data relating to the ambient temperature, an A/D converter for converting the analog detection data to digital detection data, a readout circuit for reading out temperature compensation data corresponding to the digital detection data and stored in the first memory according to the digital detection data and reading out the frequency offset amount stored in the second memory according to the digital detection data, an operation circuit for effecting the following calculation by use of the readout temperature compensation data and readout frequency offset amount to derive digital control voltage,V.sub.c =V.sub.co +(K.sub.00 +V.sub.co K.sub.10 +K.sub.01 T).times.(.DELTA.F+.DELTA.F.sup.2 .times.K.sub.10 /2)where K.sub.00, K.sub.01 and K.sub.10 are constants, V.sub.co is an initial value of the control voltage, T is an ambient temperature and .DELTA.F is a frequency offset amount, a D/A converter for converting the digital control voltage into an analog control voltage, and a voltage-capacitance converter for receiving the analog control voltage and generating a control signal to be supplied to the crystal oscillator according to the received analog control voltage, wherein the frequency of the crystal oscillator is controlled according to the control signal.
摘要翻译： 数字温度补偿振荡器包括晶体振荡器，预先存储通过预先测量环境温度与晶体振荡器的频率偏差之间的关系而获得的数字温度补偿数据的第一存储器，用于存储振荡的频率偏移量的第二存储器 晶体振荡器的频率，用于输出与环境温度有关的模拟检测数据的温度传感器，用于将模拟检测数据转换为数字检测数据的A / D转换器，读出与数字检测对应的温度补偿数据的读出电路 数据，并根据数字检测数据存储在第一存储器中，并根据数字检测数据读出存储在第二存储器中的频率偏移量;操作电路，用于通过使用读出的温度补偿数据和读出来进行以下计算 频率 偏移量导出数字控制电压，Vc = Vco +（K00 + VcoK10 + K01T）x（DELTA F + DELTA F2xK10 / 2）其中K00，K01和K10为常数，Vco为控制电压的初始值，T为环境 温度和DELTA F是频率偏移量，用于将数字控制电压转换为模拟控制电压的D / A转换器，以及用于接收模拟控制电压并产生要提供给晶体的控制信号的电压 - 电容转换器 振荡器根据接收的模拟控制电压，其中根据控制信号控制晶体振荡器的频率。
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公开(公告)号：US4764678A
公开(公告)日：1988-08-16
申请号：US852651
申请日：1986-04-16
申请人： Tsutomu Yamakawa
发明人： Tsutomu Yamakawa
CPC分类号： G01T1/208
摘要： A scintillation camera apparatus comprises a plurality of photomultipliers, a plurality of high voltage control circuits, and a comparator. The photomultipliers generate radiation energy signals upon receipt of incidence light. The comparator compares the peak pulse heights of the radiation energy signals with the corresponding reference peak values to derive deviation signals. Based upon the deviation signals, the supply of the high voltages to the photomultipliers is independently controlled.
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公开(公告)号：US09084568B2
公开(公告)日：2015-07-21
申请号：US13387827
申请日：2010-08-05
申请人： Akitoshi Katsumata , Koichi Ogawa , Tsutomu Yamakawa , Masahiro Tsujita , Tatsuya Nagano , Kazuhide Kitou
发明人： Akitoshi Katsumata , Koichi Ogawa , Tsutomu Yamakawa , Masahiro Tsujita , Tatsuya Nagano , Kazuhide Kitou
CPC分类号： A61B6/14 , A61B6/037 , A61B6/4028 , A61B6/469 , A61B6/5223
摘要： A radiation imaging apparatus is provided. The apparatus has moving means moving a pair of an X-ray tube and a detector relatively to an object. The apparatus further has means which acquire digital frame data outputted from the detector. The frame data are acquired from the same portion being imaged of the same object at different time points. The apparatus has means which use the frame data to produce a plurality of three-dimensional optimally focused images at the respective time points, an actual position and shape of the portion being imaged being reflected in the images, and means which estimate changes of the plural three-dimensional optimally focused images.
摘要翻译： 提供了一种放射线成像装置。 该装置具有相对于物体移动一对X射线管和检测器的移动装置。 该装置还具有获取从检测器输出的数字帧数据的装置。 从在不同时间点对同一对象成像的相同部分获取帧数据。 该装置具有使用帧数据在各个时间点产生多个三维最佳聚焦图像的装置，被成像部分的实际位置和形状被反映在图像中，以及估计多个图像的变化的装置 三维最佳聚焦图像。
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公开(公告)号：US20100013565A1
公开(公告)日：2010-01-21
申请号：US12584155
申请日：2009-09-01
IPC分类号： H03B1/00
CPC分类号： H03H9/0547 , H03H9/1021 , Y10T29/49005
摘要： A surface mount crystal oscillator comprises a crystal blank, an IC chip having an oscillation circuit integrated thereon, and a hermetic package for accommodating the crystal blank and IC chip therein. The hermetic package comprises a substantially rectangular ceramic substrate formed with a metal film which makes a round on one main surface thereof, and a concave metal cover having an open end face bonded to the metal film. The IC chip is secured to the one main surface of the ceramic substrate through ultrasonic thermo-compression bonding using bumps, the crystal blank is disposed above the IC chip, and the ceramic substrate has the one main surface formed as a flat surface.
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公开(公告)号：US20070120614A1
公开(公告)日：2007-05-31
申请号：US11606511
申请日：2006-11-30
IPC分类号： H03B5/32
CPC分类号： H03H9/0547 , H03H9/1021 , Y10T29/49005
摘要： A surface mount crystal oscillator comprises a crystal blank, an IC chip having an oscillation circuit integrated thereon, and a hermetic package for accommodating the crystal blank and IC chip therein. The hermetic package comprises a substantially rectangular ceramic substrate formed with a metal film which makes a round on one main surface thereof, and a concave metal cover having an open end face bonded to the metal film. The IC chip is secured to the one main surface of the ceramic substrate through ultrasonic thermo-compression bonding using bumps, the crystal blank is disposed above the IC chip, and the ceramic substrate has the one main surface formed as a flat surface.
摘要翻译： 表面贴装晶体振荡器包括晶体空白，其上集成有振荡电路的IC芯片和用于在其中容纳晶体空白和IC芯片的气密封装。 密封包装包括一个基本上矩形的陶瓷基片，该金属膜形成在一个主表面上形成圆形的金属膜，和一个具有与金属膜结合的开放端面的凹金属盖。 IC芯片通过使用凸块的超声波热压接固定在陶瓷基板的一个主表面上，晶体坯布置在IC芯片的上方，陶瓷基板的一个主表面形成为平坦表面。
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公开(公告)号：US07151173B2
公开(公告)日：2006-12-19
申请号：US10391008
申请日：2003-03-19
申请人： Yoshiaki Sasage , Tsutomu Yamakawa
发明人： Yoshiaki Sasage , Tsutomu Yamakawa
IPC分类号： C04B16/02
CPC分类号： C04B24/383 , C04B28/04 , C04B2111/00129 , C04B2111/12 , C04B14/04 , C04B40/0032 , C04B40/0039
摘要： A nonionic water-soluble cellulose ether is characterized in that when 3 pbw of the nonionic water-soluble cellulose ether is added to a mixture of 90 pbw of cordierite, 10 pbw of ordinary Portland cement, and 33 pbw of water, immediately followed by kneading at 20° C. and 20 rpm, a maximum torque for kneading is reached within 180 seconds from the addition. It is suitable as an admixture for extrudable hydraulic compositions. The hydraulic composition to which the inventive admixture is added can be kneaded within a brief time into a uniform mass which is smoothly extrudable.
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公开(公告)号：US20060063489A1
公开(公告)日：2006-03-23
申请号：US11230756
申请日：2005-09-19
申请人： Kazuo Akaike , Makoto Okamoto , Tsutomu Yamakawa , Minoru Fukuda , Kozo Ono , Nobuo Tsukamoto
发明人： Kazuo Akaike , Makoto Okamoto , Tsutomu Yamakawa , Minoru Fukuda , Kozo Ono , Nobuo Tsukamoto
CPC分类号： H04B1/30
摘要： A high-frequency wireless communication device is provided that is capable of enlarging the range of communication by enhancing reception sensitivity while avoiding mutual interference. The device comprises an antenna filter and a direct detection type reception mechanism connected to the antenna filter. A crystal filter is used as the antenna filter. A crystal chip constituting the crystal filter and an IC chip into which the reception mechanism is integrated are housed in a single modular container to configure a high-frequency wireless module.
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公开(公告)号：US06590215B2
公开(公告)日：2003-07-08
申请号：US09827439
申请日：2001-04-05
IPC分类号： G01T124
CPC分类号： H04N5/3456 , A61B6/037 , H04N5/32
摘要： A method for detecting an active pixel in a sensor having a plurality of addressable pixels, comprising detecting a trigger event that causes a pixel to go active and setting a corresponding resettable latch from an initial unset logic state to a set logic state and establishing a time window during which another pixel which becomes active is assumed to originate from the same trigger event. For all pixels that become active within the time window a corresponding analog value of the pixel is sampled and held in response to a logic signal indicative of another pixel currently being active, and an incident time of the pixel going active is established. Each of the latches in the segment is sparsely read so as successively to identify latches which are in the set logic state each corresponding to an active pixel having a known address in the sensor segment. The known address of each active pixel is associated with the incident time of the pixel going active and the respective sampled and held analog value. The process is repeated respect of successive active pixels, after which the latches are reset.
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公开(公告)号：US06236051B1
公开(公告)日：2001-05-22
申请号：US09277162
申请日：1999-03-26
申请人： Tsutomu Yamakawa , Takashi Ichihara
发明人： Tsutomu Yamakawa , Takashi Ichihara
IPC分类号： G01T124
CPC分类号： G01T1/2928
摘要： A semiconductor radiation detector has a plurality of semiconductor cells arrayed in a matrix parallel to the X-Y plane. A plurality of common electrodes for applying an operating voltage to the semiconductor cells are arranged perpendicularly to the X-Y plane. A plurality of signal electrodes for reading out signals from the semiconductor cells are arranged perpendicularly to the X-Y plane. According to a feature of this invention, each common electrode is shared by a pair of semiconductor cells adjacent in the X direction, and each signal electrode is shared by a pair of semiconductor cells adjacent in the X direction. With this arrangement, the dead zone can be reduced to increase the pixel density, in other words, the spatial resolution. If the pixel density is kept unchanged, the sensible zone of the semiconductor cell can be widened to increase the detection sensitivity.
摘要翻译： 半导体辐射检测器具有以平行于X-Y平面的矩阵排列的多个半导体单元。 用于向半导体单元施加工作电压的多个公共电极垂直于X-Y平面布置。 用于从半导体单元读出信号的多个信号电极垂直于X-Y平面布置。 根据本发明的特征，每个公共电极由在X方向上相邻的一对半导体单元共享，并且每个信号电极由在X方向上相邻的一对半导体单元共享。 通过这种布置，可以减小死区以增加像素密度，换句话说，增加空间分辨率。 如果像素密度保持不变，则可以加宽半导体单元的显着区域以增加检测灵敏度。
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公开(公告)号：US5442181A
公开(公告)日：1995-08-15
申请号：US218297
申请日：1994-03-28
申请人： Tsutomu Yamakawa , Keisei Shuto , Takuzou Takayama
发明人： Tsutomu Yamakawa , Keisei Shuto , Takuzou Takayama
CPC分类号： G01T1/1642
摘要： A radiation detector includes a plate-like monocrystal for converting a radiation ray radiated from an object to be examined to a visible ray, a glass plate provided on the monocrystal for transmitting the visible ray generated in the monocrystal and a plurality of photomultipliers arranged on the glass plate for converting the visible ray inputted through the glass plate from the monocrystal to an electrical signal.
摘要翻译： 放射线检测器包括用于将从被检测物体辐射的放射线转换成可见光的板状单晶体，设置在单晶上的玻璃板，用于透射在单晶中产生的可见光，以及多个光电倍增管， 玻璃板，用于将通过玻璃板输入的可见光从单晶转换成电信号。
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