公开(公告)号：US3955154A

公开(公告)日：1976-05-04

申请号：US571708

申请日：1975-04-25

申请人： Tadao Sasaki ,  Katsuaki Tsurushima

发明人： Tadao Sasaki ,  Katsuaki Tsurushima

IPC分类号： H01L21/331 ,  H01L27/07 ,  H01L29/00 ,  H01L29/73 ,  H03B5/12 ,  H03B5/24

CPC分类号： H03B5/24 ,  H01L27/0716 ,  H01L29/00 ,  H03B5/1203 ,  H03B5/1231

摘要： An oscillator circuit is provided which employs a single active element. In particular, the circuit utilizes a novel four-terminal semiconductor device which is able to act as a transistor with three of its terminals and, in case of use as the transistor, has the emitter-grounded current amplification factor h.sub.FE controllable with a voltage at its fourth terminal. When the novel four-terminal semiconductor device is connected so as to operate as an emitter-grounded transistor, voltage changes at its output terminal, which corresponds to the collector of the transistor, is the same in phase as voltage changes at its fourth terminal. This fact is utilized in the present invention to cause oscillation by the generative feedback from the output terminal to the fourth terminal.

摘要翻译： 提供了使用单个有源元件的振荡器电路。 特别地，该电路利用了一种新颖的四端子半导体器件，其能够用作其三个端子的晶体管，并且在用作晶体管的情况下具有可由电压在 其第四站。 当新颖的四端子半导体器件被连接以作为发射极接地晶体管工作时，其对应于晶体管的集电极的其输出端子处的电压变化与其第四端子处的电压变化相同。 这个事实在本发明中用于通过从输出端到第四端的生成反馈引起振荡。

公开(公告)号：US5244705A

公开(公告)日：1993-09-14

申请号：US746967

申请日：1991-08-19

申请人： Katsuaki Tsurushima ,  Tadao Yoshida

发明人： Katsuaki Tsurushima ,  Tadao Yoshida

IPC分类号： G11B7/007 ,  G11B7/24 ,  G11B20/00 ,  G11B20/10 ,  G11B20/12 ,  G11B27/30 ,  G11B27/32 ,  G11B27/34 ,  G11B27/36

CPC分类号： G11B20/00007 ,  G11B20/10527 ,  G11B20/1251 ,  G11B27/3027 ,  G11B27/3036 ,  G11B27/3063 ,  G11B27/329 ,  G11B27/34 ,  G11B27/36 ,  G11B7/007 ,  G11B7/24 ,  G11B20/1217 ,  G11B2020/10592 ,  G11B2220/213 ,  G11B2220/2525 ,  G11B2220/2545 ,  Y10S428/913

摘要： A disc-shaped recording medium for storing compressed audio data which have been recorded thereon by an optical recording apparatus. The inner diameter of a data recording region of the disc-shaped recording medium is in the range from 28 mm to 50 mm. The outer diameter of the data recording region is in the range from 58 mm to 62 mm for an inner diameter of 28 mm, and is in the range from 71 mm to 73 mm for an inner diameter of 50 mm. The disc-shaped recording medium may be used with a small-sized portable disc recording and reproducing apparatus, and can record compressed audio data for playback with a playback time substantially as long as that of a standard compact disc having 12 cm diameter.

公开(公告)号：US3968382A

公开(公告)日：1976-07-06

申请号：US512257

申请日：1974-10-04

申请人： Katsuaki Tsurushima

发明人： Katsuaki Tsurushima

IPC分类号： G01H1/04 ,  G01V1/16 ,  H03F1/42 ,  H03F1/52 ,  H03F3/30 ,  H02H9/04 ,  H02H7/20 ,  H03F3/16 ,  H03F3/185

CPC分类号： G01H1/04 ,  G01V1/16 ,  H03F1/52 ,  H03F1/523 ,  H03F3/305 ,  H03F2200/516

摘要： A field effect transistor amplifier comprising one or more depletion-type field effect transistors, preferably with triode characteristics, and having an operating voltage applied across its drain and source electrodes through a load, while an input signal to be amplified is applied to its gate electrode and a predetermined DC gate bias voltage is applied between the gate and source electrodes; is provided with a protective circuit for preventing damage to the field effect transistor by an excessive input signal that is, by over-drive, and which includes a source resistor connected in series with the source electrode and a constant voltage element, for example, constituted by one or more diodes, connected between the gate electrode and the side of the source resistor remote from the respective source electrode. The resistance value of the source resistor and the forward voltage of the diode or constant voltage element are selected so that the maximum drain or source current of each field effect transistor, when operated with an input signal applied to its gate electrode, does not exceed the maximum drain or source current of the field effect transistor in the absence of any gate-source voltage applied thereto. The source resistor of the foregoing protective circuit may further preferably be included in another protective circuit by which the input signal is shunted to the load when the impedance of the latter declines below a predetermined value, for example, in response to a short circuit in the load, so as to prevent overloading of the field effect transistor. Further, a push-pull amplifier employing triode characteristic field effect transistors with the foregoing protective circuits therefor is disclosed with a biasing circuit for stabilizing the biasing DC drain current of the field effect transistors when the operating voltage is subject to fluctuations.

摘要翻译： 一种场效应晶体管放大器，包括一个或多个耗尽型场效应晶体管，优选具有三极管特性，并且具有通过负载施加在其漏源极和源电极之间的工作电压，同时要放大的输入信号施加到其栅电极 并且在栅极和源极之间施加预定的DC栅极偏置电压; 具有保护电路，用于通过过驱动的过大输入信号来防止对场效应晶体管的损害，并且包括与源电极串联连接的源极电阻和例如构成的恒压元件 通过一个或多个二极管连接在栅电极和远离源电极的源电阻器侧。 选择源电阻器的电阻值和二极管或恒压元件的正向电压，使得当施加到其栅电极的输入信号操作时，每个场效应晶体管的最大漏极或源极电流不超过 在没有施加任何栅极 - 源极电压的情况下，场效应晶体管的最大漏极或源极电流。 上述保护电路的源电阻可以进一步优选地包括在另一个保护电路中，当另一个保护电路当其阻抗下降到预定值以下时，输入信号被分流到负载，例如响应于 负载，以防止场效应晶体管的过载。 此外，公开了一种采用具有上述保护电路的三极管特性场效应晶体管的推挽放大器，其具有用于在工作电压经受波动时稳定场效应晶体管的偏置DC漏极电流的偏置电路。

公开(公告)号：US3949316A

公开(公告)日：1976-04-06

申请号：US564118

申请日：1975-04-01

申请人： Katsuaki Tsurushima

发明人： Katsuaki Tsurushima

IPC分类号： H03F3/187 ,  H01L21/331 ,  H01L21/70 ,  H01L29/00 ,  H01L29/73 ,  H01L29/80 ,  H03F1/30 ,  H03F3/185 ,  H03F3/34 ,  H03F3/345 ,  H03F3/347 ,  H03F3/16

CPC分类号： H03F3/1855 ,  H01L29/00 ,  H03F1/306

摘要： A cascade-connected transistor amplifier comprised of a bipolar transistor having one of its collector and emitter electrodes connected directly to the gate electrode of an FET. The bipolar transistor comprises a first semiconductor region of a first conductivity type, a second semiconductor region of a second conductivity type disposed adjacent the first semiconductor region, a third semiconductor region of the first conductivity type disposed adjacent the second semiconductor region, and a potential barrier positioned within the first semiconductor region spaced from and opposite the junction defined by the first and second semiconductor regions by a distance smaller than the diffusion distance of minority carriers injected into the first semiconductor region, the semiconductor regions being provided with emitter, base and collector electrodes, respectively. The FET has triode-type dynamic characteristics. A first load impedance is connected to one of the collector and emitter electrodes, and a second load impedance is connected in series with the drain-source circuit of the field effect transistor. Operating voltages are supplied to the respective bipolar and field effect transistors through the respective load impedances. An input signal is applied to the base electrode of the bipolar transistor. In one embodiment, an AC negative feedback impedance defines a feedback path between the drain electrode of the field effect transistor and the emitter electrode of the bipolar transistor. The AC feedback circuit can be used to compensate for equalizing of the input signal.

摘要翻译： 一个级联连接的晶体管放大器由双极晶体管组成，其双极晶体管的一个集电极和发射极直接连接到FET的栅电极。 双极晶体管包括第一导电类型的第一半导体区域，邻近第一半导体区域布置的第二导电类型的第二半导体区域，邻近第二半导体区域设置的第一导电类型的第三半导体区域和势垒 位于与由第一和第二半导体区域限定的接合部间隔开并相对于第一半导体区域的距离小于注入到第一半导体区域中的少数载流子的扩散距离的距离处，半导体区域设置有发射极，基极和集电极 ， 分别。 FET具有三极管型动态特性。 第一负载阻抗连接到集电极和发射极之一，并且第二负载阻抗与场效应晶体管的漏 - 源电路串联连接。 工作电压通过相应的负载阻抗提供给相应的双极和场效应晶体管。 输入信号施加到双极晶体管的基极。 在一个实施例中，AC负反馈阻抗限定了场效应晶体管的漏电极和双极晶体管的发射极之间的反馈路径。 AC反馈电路可用于补偿输入信号的均衡。

公开(公告)号：US3943286A

公开(公告)日：1976-03-09

申请号：US455786

申请日：1974-03-28

申请人： Katsuaki Tsurushima

发明人： Katsuaki Tsurushima

IPC分类号： G05F3/24 ,  H01L29/43 ,  H03G1/00 ,  H03G3/10 ,  H03H11/24 ,  H04S3/02 ,  H04R5/00 ,  H03G3/30

CPC分类号： H01L29/435 ,  H03G1/007 ,  H04S3/02

摘要： A variable gain control circuit comprising a signal transmitting path having an input terminal supplied with an input signal and an output terminal delivering therefrom a gain controlled output signal, a variable impedance device having first, second and third electrodes, said first and second electrodes being connected between the connection point of the input and output terminals and a reference point, respectively, and said third electrode being supplied with a control voltage, a DC biasing means for applying a threshold voltage to the variable impedance device, and means for applying the same DC voltage to the first and second electrodes, whereby an undesirable signal in response to said control voltage is not produced at the output terminal of the signal transmitting path.

摘要翻译： 一种可变增益控制电路，包括具有输入端子的输入信号的信号传输路径和从其输出增益控制输出信号的输出端子，具有第一和第二电极的可变阻抗器件，所述第一和第二电极被连接 分别在输入和输出端子的连接点和参考点之间，并且所述第三电极被提供控制电压，用于向可变阻抗装置施加阈值电压的DC偏置装置，以及用于施加相同DC 电压到第一和第二电极，由此在信号传输路径的输出端子处不产生响应于所述控制电压的不期望的信号。

公开(公告)号：US06575581B2

公开(公告)日：2003-06-10

申请号：US09751015

申请日：2000-12-28

申请人： Katsuaki Tsurushima

发明人： Katsuaki Tsurushima

IPC分类号： G03B2100

CPC分类号： G03B21/14 ,  G03B17/54 ,  G03B21/2086 ,  H04N9/3129 ,  H04N9/3194

摘要： An image projection method for projecting laser beams and an image projector that projects laser beams are adapted to shut down the laser beams instantaneously when an obstacle intruding into the projection area of the laser beams is detected. A detection wave is projected onto a display screen along with the laser beams for displaying an image. The reflection wave of the detection wave reflected from the display screen is detected so as to find out whether the obstacle, if any, is intruding into the projection area of the laser beams.

摘要翻译： 用于投影激光束的图像投影方法和投影激光束的图像投影仪适于当检测到入射到激光束的投影区域中的障碍物时立即关闭激光束。 检测波与用于显示图像的激光束一起投射到显示屏幕上。 检测从显示画面反射的检测波的反射波，以便确定障碍物（如果有的话）是否侵入到激光束的投影区域中。

公开(公告)号：US5666347A

公开(公告)日：1997-09-09

申请号：US343362

申请日：1994-11-22

申请人： Tadao Yoshida ,  Katsuaki Tsurushima

发明人： Tadao Yoshida ,  Katsuaki Tsurushima

IPC分类号： G11B17/028 ,  G11B23/00 ,  G11B3/70

CPC分类号： G11B17/0282 ,  G11B23/0035

摘要： A plate made of a magnetic material is secured to an optical disk so that it closes a central hole formed in a disk substrate. An optical disk chucking mechanism for chucking the optical disk to a disk table attracts the magnetic plate by the magnet to cause a platen to abut to the disk substrate and a tapered portion to abut to the inner side of the central hole so that the optical disk is restricted in position and is held. The optical disk and optical disk chucking mechanism restrict the loading position of the optical disk on the disk table independently of the mounting position of the magnetic plate on the disk substrate.

摘要翻译： 由磁性材料制成的板被固定在光盘上，从而封闭形成在盘基片上的中心孔。 用于将光盘夹持到盘台的光盘夹紧机构通过磁体吸引磁板，使压板与盘基板抵接，锥形部分抵靠中心孔的内侧，使得光盘 被限制在被拘留。 光盘和光盘夹持机构将磁盘的装载位置限制在盘片基板上的磁盘的安装位置上。

公开(公告)号：US5467332A

公开(公告)日：1995-11-14

申请号：US985815

申请日：1992-12-03

申请人： Katsuaki Tsurushima

发明人： Katsuaki Tsurushima

IPC分类号： G11B23/50 ,  G11B33/14 ,  G11B3/58 ,  G11B5/41

CPC分类号： G11B33/1446 ,  G11B23/505

摘要： A disc cleaning device for cleaning a disc on which information signals are pre-recorded or are to be recorded and which is housed within a disc cartridge, is disclosed. The disc cleaning device includes a cartridge holder in which a disc cartridge is loaded. The disc cartridge is the disc accommodated in a cartridge main body. The disc cleaning device also includes a shutter opening unit for moving a shutter member for opening an aperture in the disc cartridge loaded on the cartridge holder, which aperture has been closed by the shutter member. The disc cleaning device also includes a disc rotating and driving unit for rotating the disc housed within the disc cartridge, and a cleaning unit having a cleaning member adapted for being caused to bear on an information recording surface of the disc via the aperture in the disc cartridge.

摘要翻译： 公开了一种用于清洁其信息信号被预先记录或将被记录并被容纳在盘盒内的盘的光盘清洁装置。 光盘清洁装置包括其中装载有光盘盒的盒保持器。 盘盒是容纳在盒主体中的盘。 光盘清洁装置还包括快门打开单元，用于移动用于打开装载在盒保持器上的盘盒中的孔的快门部件，该光圈已由遮板部件封闭。 光盘清洁装置还包括用于旋转容纳在盘盒内的盘的盘旋转和驱动单元，以及具有清洁部件的清洁单元，该清洁部件适于经由盘中的孔承载在盘的信息记录表面上 墨盒。

公开(公告)号：US5299186A

公开(公告)日：1994-03-29

申请号：US874178

申请日：1986-05-29

申请人： Katsuaki Tsurushima

发明人： Katsuaki Tsurushima

IPC分类号： B65D85/57 ,  G11B23/00 ,  G11B33/04 ,  B65D85/30 ,  G11B23/03

CPC分类号： G11B33/0427

摘要： A disc protecting cover for preventing a disc used as an information recording medium from being damaged or wounded while the disc is not in use, which comprises a flat portion (11;11A) having a diameter smaller than that of a disc which is provided with a center hole and a signal reading surface portion formed on a part of the surface thereof extending around the center hole, and an engaging portion (12) projecting from a central part of the flat portion (11'11A) and adapted to be inserted into the center hole of the disc to engage with the same. The flat portion (11;11A) covers the signal reading surface portion of the disc when the engaging portion (12) is inserted into the center hole of the disc to engage with the same. The disc protecting cover is attached to the disc to be detachable therefrom and can reliably protect the signal reading surface portion of the disc against damage or wound without covering portions of the disc which are not required to be covered therewith.

摘要翻译： 一种盘保护盖，用于防止在不使用盘时用作信息记录介质的盘被损坏或受伤，其包括直径小于设置有盘的盘的直径的平坦部分（11; 11A） 中心孔和信号读取表面部分，形成在其围绕中心孔延伸的表面的一部分上;以及接合部分（12），其从平坦部分（11'11A）的中心部分突出并适于插入 光盘的中心孔与之啮合。 当接合部分（12）插入到盘的中心孔中以与其接合时，平坦部分（11; 11A）覆盖盘的信号读取表面部分。 盘保护盖附接到盘可拆卸，并且可靠地保护盘的信号读取表面部分免受损坏或缠绕而不覆盖不需要覆盖的盘的部分。

公开(公告)号：US4031482A

公开(公告)日：1977-06-21

申请号：US630331

申请日：1975-11-10

申请人： Katsuaki Tsurushima

发明人： Katsuaki Tsurushima

IPC分类号： H03F1/30 ,  H03F3/30 ,  H03F3/16

CPC分类号： H03F3/3044 ,  H03F1/305

摘要： A bias circuit particularly adapted for use with a field effect transistor whereby the drain bias current of the field effect transistor is maintained constant in the event of fluctuations in the operating voltage applied to the field effect transistor by a power supply. The bias circuit changes the gate bias voltage applied to the FET as a function of the fluctuations in the operating voltage to thereby restore the drain bias current to a constant value. A variable impedance is included in the bias circuit, the variable impedance being voltage dependent such that its impedance varies as the voltage applied thereto varies in accordance with a hyperbolic relation. The voltage applied to the variable impedance is derived from, and thus includes the fluctuations in, the operating voltage. The hyperbolic relation between the impedance and the voltage applied to the variable impedance effectively matches the relation between the pinch-off voltage V.sub.P and the amplification constant .mu. of the FET.

摘要翻译： 特别适合于与场效应晶体管一起使用的偏置电路，由此在通过电源施加到场效应晶体管的工作电压的波动的情况下，场效应晶体管的漏极偏置电流保持恒定。 偏置电路根据工作电压的波动来改变施加到FET的栅极偏置电压，从而将漏极偏置电流恢复到恒定值。 可变阻抗包括在偏置电路中，可变阻抗是电压依赖的，使得其阻抗随着施加的电压根据双曲线关系而变化。 施加到可变阻抗的电压从工作电压导出，并且因此包括工作电压的波动。 阻抗与施加到可变阻抗的电压之间的双曲线关系有效地匹配了截止电压VP和FET的放大常数μmu之间的关系。