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公开(公告)号：US4212029A
公开(公告)日：1980-07-08
申请号：US825039
申请日：1977-08-16
申请人： Takeshi Murakami , Katashi Hazama
发明人： Takeshi Murakami , Katashi Hazama
CPC分类号： H04N9/647 , H03H9/6489
摘要： It has been known that a sound trap or band pass amplifier makes the group delay characteristic of a chromaticity signal component non-uniform. The present invention provides an elastic surface wave filter whose amplitude characteristic is so determined as to be adapted for a video intermediate frequency amplifier and whose group delay characteristic is so determined that the chromaticity signal component in a color composite video signal from a tuner advances further in delay time on the high frequency side than on the low frequency side in order to compensate that non-uniformity of the group delay characteristic from which the chromaticity signal component suffers.
摘要翻译： 已知声音陷波器或带通放大器使得色度信号分量的组延迟特性不均匀。 本发明提供了一种弹性表面波滤波器，其幅度特性被确定为适用于视频中频放大器，并且其组延迟特性被确定为来自调谐器的彩色复合视频信号中的色度信号分量进一步前进 为了补偿色度信号分量遭受的群延迟特性的不均匀性，在高频侧的延迟时间比在低频侧。
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公开(公告)号：US4223285A
公开(公告)日：1980-09-16
申请号：US857908
申请日：1977-12-06
申请人： Katashi Hazama , Jun Yamada , Yoshihiko Noro
发明人： Katashi Hazama , Jun Yamada , Yoshihiko Noro
CPC分类号： H03H9/6423 , H03H9/02874 , H03H9/1452
摘要： An elastic surface wave filter for use as an intermediate frequency filter in a color television receiver, comprising an input electrode provided on a piezoelectric substrate plate for converting an electric signal into elastic surface waves propagating through the surface layer of the piezoelectric substrate plate, a propagation path for the elastic surface waves in the piezoelectric substrate plate and an output electrode for converting the propagated elastic surface wave into an electric signal, wherein the fingers of the input electrode are so arranged that the position at which the overlap of the interleaved fingers is maximum is farther with respect to the output electrode than the middle point along the lengthwise direction of the input electrode and wherein the pitch between the adjacent interleaved fingers is non-uniform on both the sides of the position of the maximum overlap, whereby desired group delay and amplitude characteristics for predetermined frequencies are easily and simultaneously obtained.
摘要翻译： 一种在彩色电视接收机中用作中频滤波器的弹性表面波滤波器，包括设置在压电基板上用于将电信号转换成通过压电基板的表面层传播的弹性表面波的输入电极，传播 压电基板中的弹性表面波的路径和用于将传播的弹性表面波转换为电信号的输出电极，其中输入电极的指状物布置成使得交错的手指的重叠的位置最大 相对于输出电极比沿着输入电极的长度方向的中点更远，并且其中相邻交错的手指之间的间距在最大重叠的位置的两侧是不均匀的，由此期望的组延迟和 预定频率的振幅特性很容易 同时获得。
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公开(公告)号：US4201964A
公开(公告)日：1980-05-06
申请号：US917220
申请日：1978-06-20
CPC分类号： H03H9/14573 , H03H9/02842 , H03H9/1452 , H03H9/14547 , H03H9/14555 , H03H9/6496 , H03H9/02992
摘要： To eliminate disturbance signals caused by the reflection from the unitary stem areas of comb-like electrodes of an interdigital transducer in an elastic surface wave device, the edges of the unitary stem areas perpendicular to the surface wave propagating direction includes at least one pair of partial edges, the positions of the partial edges in each of the at least one pair of partial edges differ by (2n+1).multidot..lambda./4 from each other in the surface wave propagating direction, and the lengths of the partial edges in the each pair are equal to each other, where n represents zero or a positive integer and .lambda. represents the wavelength of the elastic surface.
摘要翻译： 为了消除由弹性表面波装置中的叉指式换能器的梳状电极的整体茎区域的反射引起的干扰信号，垂直于表面波传播方向的整体茎区域的边缘包括至少一对部分 边缘中，至少一对部分边缘中的每一个中的部分边缘的位置在表面波传播方向上彼此相差（2n + 1）×λ/ 4，并且每个边缘中的部分边缘的长度 对彼此相等，其中n表示零或正整数，λ表示弹性表面的波长。
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4.发明授权Surface-acoustic-wave filter for channel selection system of television receiver 失效电视接收机频道选择系统的表面声波滤波器
公开(公告)号：US4296391A
公开(公告)日：1981-10-20
申请号：US954124
申请日：1978-10-24
申请人： Katashi Hazama , Akitsuna Yuhara
发明人： Katashi Hazama , Akitsuna Yuhara
CPC分类号： H03H9/6413 , H03H9/1455 , H03H9/72 , H03J5/24 , H03H9/6436 , H03H9/6453
摘要： A surface-acoustic-wave filter for a channel selection tuning system of a television receiver includes at least two comb filter elements, each of which comprises an input transducer provided on a piezoelectric substrate and adapted to convert an input electrical signal into an elastic surface wave, and first and second output transducers disposed on the substrate for receiving the elastic surface wave propagating in the same direction from the input transducer. The first and second output transducers are positioned from the input transducer with different distances. The transducers of the two comb filter elements are so designed that the respective comb filter elements respond to frequencies of different program channel bands over for example VHF and UHF bands. The distances of the first and the second output transducers from the input transducer in the wave propagating direction are so predetermined that reciprocal of the difference in delay time between the electrical signals derived from the first and second output transducers is equal to a divisor of an interchannel frequency difference in the corresponding channel band.
摘要翻译： 一种用于电视接收机的频道选择调谐系统的表面声波滤波器包括至少两个梳状滤波器元件，每个梳状滤波器元件包括设置在压电基片上的输入换能器，其适于将输入电信号转换成弹性表面波 以及设置在基板上的第一和第二输出换能器，用于接收从输入换能器沿相同方向传播的弹性表面波。 第一和第二输出换能器从不同距离的输入换能器定位。 两个梳状滤波器元件的换能器被设计成使得相应的梳状滤波器元件响应于例如VHF和UHF频带的不同节目频道频带的频率。 第一和第二输出换能器与输入换能器在波传播方向上的距离是如此预定的，即从第一和第二输出换能器得到的电信号之间的延迟时间差的倒数等于通道间的除数 相应频道频段的频差。
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5.发明授权Piezoelectric surface acoustic wave device with suppression of reflected signals 失效具有抑制反射信号的压电声表面波器件
公开(公告)号：US4206380A
公开(公告)日：1980-06-03
申请号：US972215
申请日：1978-12-22
申请人： Katashi Hazama , Kentaro Hanma
发明人： Katashi Hazama , Kentaro Hanma
CPC分类号： H03H9/02842 , H03H9/1452
摘要： A surface acoustic wave device has an electrode finger structure in which the width of finger portions external of envelopes indicating a weighted overlap length and the length of the spaces existing between adjacent finger portions measured widthwise thereof are substantially equal to one half of the wavelength of the acoustic surface wave, the envelopes are symmetric about the center line of a propagation path for the surface acoustic wave, and the finger portions and the spaces between the finger portions are in opposite positional relation to each other about the center line of the propagation path. With this electrode finger structure, occurrence of disturbing reflected signal at the weighted interdigital electrode, which is used as an input/output electrode of the surface acoustic wave device and occurrence of wavefront distortion are prevented and production yield of the device is improved.
摘要翻译： 表面声波装置具有电极指结构，其中信封外部的手指部分的宽度指示加权的重叠长度，并且其宽度方向上测量的相邻手指部分之间存在的空间的长度基本上等于波长的一半 声表面波，信封围绕声表面波的传播路径的中心线对称，并且手指部分和指状部分之间的空间围绕传播路径的中心线彼此相对位置关系。 通过这种电极指结构，可以防止用作声表面波装置的输入/输出电极的加权叉指电极的干扰反射信号的出现以及波前畸变的发生，从而提高装置的产量。
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公开(公告)号：US4510530A
公开(公告)日：1985-04-09
申请号：US389968
申请日：1982-06-18
申请人： Kuniaki Miura , Akira Shibata , Jun Yamada , Katashi Hazama
发明人： Kuniaki Miura , Akira Shibata , Jun Yamada , Katashi Hazama
CPC分类号： H04N5/94 , H04N5/9315 , H04N9/87
摘要： In a FM luminance signal circuit of a signal reproducing circuit of a video tape recorder,(a) a reproduced signal is up-converted by an up-converter, the up-converted signal is divided into two frequency components by a surface acoustic wave filter having a first filter for peaking a high frequency component and a second filter for peaking a low frequency component, a limiter connected to the first filter, an amplifier connected to the second filter, and an adder of an output of a limiter and an output of an amplifier, and the reversal of the levels of the FM carrier signal and side band signal is prevented by above configuration.(b) A side-band glass delay line of 1H (one horizontal scan period) is provided to get 1H delayed luminance signal. Using main luminance signal and 1H delayed luminance signal, a line correlation circuit and a video dropout compensation circuit are realized.(c) In a PAL signal reproducing circuit, where a chrominance signal is delayed by 1H by a comb filter using 2H delay line, 1H delayed luminance signal is used to prevent a chrominance displacement from the luminance signal.
摘要翻译： 在磁带录像机的信号再现电路的FM亮度信号电路中，（a）再现信号由上变频器进行上变频，上变换后的信号被表面声波滤波器分成两个频率分量 具有用于使高频分量达峰化的第一滤波器和用于使低频分量达峰化的第二滤波器，连接到第一滤波器的限幅器，连接到第二滤波器的放大器和限幅器的输出的加法器 放大器，并通过上述配置来防止FM载波信号和边带信号的电平反转。 （b）提供1H（一个水平扫描周期）的边带玻璃延迟线以获得1H延迟亮度信号。 使用主亮度信号和1H延迟亮度信号，实现线相关电路和视频压差补偿电路。 （c）在PAL信号再现电路中，通过使用2H延迟线的梳状滤波器将色度信号延迟1H，使用1H延迟亮度信号来防止来自亮度信号的色度位移。
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公开(公告)号：US4427515A
公开(公告)日：1984-01-24
申请号：US256960
申请日：1981-04-23
申请人： Akitsuna Yuhara , Shinya Iida , Hideo Abe , Kiyoharu Kishimoto , Katashi Hazama
发明人： Akitsuna Yuhara , Shinya Iida , Hideo Abe , Kiyoharu Kishimoto , Katashi Hazama
CPC分类号： H03H3/08
摘要： A surface acoustic wave device, a method for manufacturing the same and a manufacturing equipment therefor are disclosed. In the surface acoustic wave device having functional elements such as input and output interdigital electrodes of Al, Al-Si alloy or Al-Cu-Si alloy thin film strips and a grating type reflector, arranged on a piezoelectric substrate and any other bus conductors arranged on the same substrate, at least a portion of the functional elements and the bus conductors having a high frequency metal strip having a line width of no more than 2 .mu.m, at least the metal strip having the width of no more than 2 .mu.m has a film thickness of no less than 0.25 .mu.m at least a portion thereof but no more than an upper limit of an effective film thickness determined by a required characteristic of the surface acoustic wave device, whereby a transfer characteristic of the surface acoustic wave device is compensated and controlled, for example, a reflection efficiency of a grating type reflector is improved or a loss due to a D.C. resistance of the input and output electrodes is reduced.
摘要翻译： 公开了一种声表面波装置及其制造方法及其制造装置。 在具有诸如Al，Al-Si合金或Al-Cu-Si合金薄膜条的输入和输出叉指电极等功能元件的表面声波装置和布置在压电基板上的任何其它总线导体布置的光栅型反射器 在相同的基板上，功能元件和总线导体的至少一部分具有线宽不大于2μm的高频金属条，至少宽度不大于2μm的金属条 具有至少一部分的膜厚不小于0.25μm，但不超过由声表面波装置的要求特性确定的有效膜厚度的上限，由此表面声波装置的传递特性 被补偿和控制，例如，光栅型反射器的反射效率提高或由于输入和输出电极的直流电阻的损耗减小。
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8.发明授权Optical information medium with sample mark area and multiple transcription prevention 失效具有样品标记面积和多重转录预防的光学信息介质
公开(公告)号：US4991163A
公开(公告)日：1991-02-05
申请号：US153004
申请日：1988-02-08
CPC分类号： G11B7/26 , G11B7/0938 , G11B7/24
摘要： An optical disc consists of a base plate, a reflective thin layer, and a protective thin layer. The optical disc has a sample mark area having two sample marks, one of which is off-set on one side of a track, another of which is off-set at an opposite side of a track. These sample marks are produced by an injection molding with replica technique. At the time of the injection molding, additional pressure moves soft injected plastic resin, which causes double transcription of the sample marks. For preventing the double transcription, groove areas are provided on opposite sides of the sample mark area. The groove areas provide an anchor effect at the time of injection molding.
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公开(公告)号：US4422000A
公开(公告)日：1983-12-20
申请号：US374758
申请日：1982-05-04
申请人： Jun Yamada , Katashi Hazama
发明人： Jun Yamada , Katashi Hazama
CPC分类号： H03H9/14508
摘要： A surface acoustic wave device on a piezoelectric substrate comprises an interdigital transducer having an interdigital sending part in the forward direction and an interdigital reflecting part in the reverse direction. An electrical phase difference of .phi. (radian) is applied between the sending and reflecting parts, while the distance between the sending and reflecting parts providing a geometrical phase difference therebetween is established to be ##EQU1## where n is a positive integer and .lambda..sub.o is the wavelength of surface acoustic wave. A third, common electrode meanders between the sending and reflecting electrodes.
摘要翻译： 压电基板上的表面声波装置包括具有向前方向的叉指式发送部的交叉指型变换器和反方向的叉指反射部。 在发送和反射部分之间施加phi（弧度）的电相位差，而在其间提供几何相位差的发送和反射部分之间的距离被确定为
，其中n是正整数，λo是 声表面波的波长。 第三，在发射和反射电极之间的公共电极曲折。 -
公开(公告)号：US4396851A
公开(公告)日：1983-08-02
申请号：US211905
申请日：1980-12-01
CPC分类号： H03H9/1455
摘要： A surface acoustic wave device is provided with plural sets of input and output transducers arranged on a piezoelectric substrate with the input transducers and the output transducers being connected electrically in parallel, respectively. In order to minimize a loss which occurs due to the parallel connections of the input and output transducers, aperture dimensions of either the input transducers or the output transducers are selected such that static capacitances of the respective transducers are equal.
摘要翻译： 表面声波装置设置有多组输入和输出换能器，其分别与输入换能器和输出换能器并联电连接在压电基片上。 为了最小化由于输入和输出换能器的并联连接而发生的损耗，选择输入换能器或输出换能器的孔径尺寸，使得各个换能器的静态电容相等。
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