公开(公告)号：US06921950B2

公开(公告)日：2005-07-26

申请号：US10294761

申请日：2002-11-15

Applicant: Kenichi Tatehara ,  Norihide Kinugasa

Inventor： Kenichi Tatehara ,  Norihide Kinugasa

IPC: H01L21/822 ,  H01L21/8249 ,  H01L23/60 ,  H01L23/62 ,  H01L27/02 ,  H01L27/04 ,  H01L29/74 ,  H02H9/00 ,  H03K19/00 ,  H03K19/003

CPC classification number: H01L27/0266 ,  H01L27/0251 ,  H01L2924/0002 ,  H01L2924/00

Abstract: In order to improve the robustness against electrostatic discharge, when power source terminal and ground terminal are open, of a semiconductor device having a first, a second and a third inverter that are connected in a cascade arrangement, the semiconductor device is provided not only with a first input protection circuit for guiding positive electrostatic discharges, that are applied from outside to a signal input terminal, to a power source line, and a second input protection circuit for guiding negative electrostatic discharges, that are applied from outside to the signal input terminal, to a ground line, but also an internal protection circuit for guiding electrostatic discharges that have been guided by the first input protection circuit to the power source line and flow from a P-channel MOS transistor in the second inverter towards the third inverter, to the ground line.

公开(公告)号：US20060114142A1

公开(公告)日：2006-06-01

申请号：US11235334

申请日：2005-09-27

Applicant: Kazuyuki Ohmi ,  Kenichi Tatehara

Inventor： Kazuyuki Ohmi ,  Kenichi Tatehara

IPC: H03M1/12

CPC classification number: H03M1/687 ,  H03M1/747 ,  H03M1/785

Abstract: A current summing type D/A converter having a configuration of two or more steps is provided. In a D/A converter block of the first step, by adding current segments, upper bits are D/A converted, and one of the current segments in the first step is further supplied to a D/A converter block in a second step to be shunt by the D/A converter block in the second step, so that lower bits are D/A converted. The output current in the first step and the output current in the second step are then added each other. According to the foregoing method, the D/A conversion may be performed without causing a differential linearity error.

Abstract translation: 提供具有两个或多个步骤的配置的电流求和型D / A转换器。 在第一步骤的D / A转换器模块中，通过加上当前段，高位进行D / A转换，第一步中的当前段之一进一步提供给D / A转换器模块， 在第二步中由D / A转换器模块分流，以便低位转换为D / A。 然后将第一步骤中的输出电流和第二步骤中的输出电流相加。 根据上述方法，可以执行D / A转换而不引起差分线性误差。

公开(公告)号：US06469647B1

公开(公告)日：2002-10-22

申请号：US09913519

申请日：2001-08-15

Applicant: Norihide Kinugasa ,  Kenichi Tatehara

Inventor： Norihide Kinugasa ,  Kenichi Tatehara

IPC: H03M166

CPC classification number: H03M1/687 ,  H03M1/765 ,  H03M1/785

Abstract: The digital-analog converter circuit includes: a high-order D-A converter circuit unit (100) for outputting a first voltage (Va) and a second voltage (Vb) both resulting from D-A conversion of the high-order five bits of a 13-bit input code to first and second output nodes (11, 12) through two buffers (10a, 10b) having the same characteristics, respectively; a low-order D-A converter circuit unit (200) for receiving the voltages on these two output nodes as reference voltages of an R-2R ladder circuit (201) and conducting D-A conversion of the low-order eight bits of the input code for output to a third output node (13); a sample-and-hold unit (250) for selectively sampling and holding the voltage on the third output node (13), i.e., the D-A conversion output of the 13-bit input code, according to a value of the input code; and an output unit (300) for multiplying the sampled and held D-A conversion output voltage by a gain with respect to an arbitrary central voltage. Thus, a D-A converter circuit capable of outputting a desired analog voltage with high accuracy even when a large number of bits are converted is implemented with a small chip area.

Abstract translation: 数模转换器电路包括：高阶DA转换器电路单元，用于输出由13位的高位五位的DA转换产生的第一电压（Va）和第二电压（Vb） 分别通过具有相同特征的两个缓冲器（10a，10b）将第一和第二输出节点（11,12）的位输入代码分配给第一和第二输出节点; 用于接收这两个输出节点上的电压作为R-2R梯形电路（201）的参考电压的低阶DA转换器电路单元（200），并且输入用于输出的输入代码的低8位的DA转换 到第三输出节点（13）; 采样保持单元，用于根据输入代码的值选择性地对第三输出节点（13）上的电压进行采样并保持13位输入代码的D-A转换输出; 以及用于将采样和保持的D-A转换输出电压相对于任意中心电压乘以增益的输出单元（300）。 因此，即使在大量位转换时也能以高精度输出期望的模拟电压的D-A转换器电路以小的芯片面积实现。

公开(公告)号：US20110317729A1

公开(公告)日：2011-12-29

申请号：US13167240

申请日：2011-06-23

Applicant: Takeshi MATSUMOTO ,  Kenichi Tatehara ,  Toshiyuki Shimada ,  Yuichi Takahashi

Inventor： Takeshi MATSUMOTO ,  Kenichi Tatehara ,  Toshiyuki Shimada ,  Yuichi Takahashi

IPC: H01S3/10 ,  G05F1/10

CPC classification number: H01S5/042

Abstract: A current driving device comprises; a three-terminal regulator configuration circuit operative as a three-terminal regulator which drops a voltage of a first electric power supply to a predetermined target output voltage in a state where a main terminal and a control terminal of a power transistor are connected to a main terminal connection terminal and a control terminal connection terminal, respectively; a voltage setting circuit which sets a control voltage corresponding to a target output voltage which is applied from the three-terminal regulator configuration circuit to the control terminal of the power transistor; and a voltage restricting circuit which is connected to the control terminal connection terminal and controls the control voltage applied to the control terminal of the power transistor so that the output voltage of the three-terminal regulator configuration circuit becomes a predetermined voltage or less, upon being supplied with the electric power from the first electric power supply.

Abstract translation: 电流驱动装置包括： 三端稳压器配置电路作为三端稳压器工作，三端调节器在功率晶体管的主端子和控制端连接到主电源的状态下将第一电源的电压降低到预定的目标输出电压 端子连接端子和控制端子连接端子; 电压设定电路，其将对应于从三端稳压器配置电路施加的目标输出电压的控制电压设定到功率晶体管的控制端子; 以及电压限制电路，其连接到控制端子连接端子，并且控制施加到功率晶体管的控制端子的控制电压，使得三端子稳压器配置电路的输出电压变为预定电压或更小 提供有来自第一电源的电力。

公开(公告)号：US07046706B2

公开(公告)日：2006-05-16

申请号：US10719435

申请日：2003-11-21

Applicant: Kenichi Tatehara ,  Haruhiko Mizuno ,  Norihide Kinugasa

Inventor： Kenichi Tatehara ,  Haruhiko Mizuno ,  Norihide Kinugasa

IPC: H01S3/00 ,  H01S3/30

CPC classification number: G11B7/126 ,  H01S5/042 ,  H01S5/0428

Abstract: A laser diode driving device of the present invention can appropriately shorten the rising time and the falling time of a laser diode drive current in a range from a small current region to a large current region. In synchronization with the addition of an original input current from an input constant current source to the laser diode drive current amplifier, a differentiated current is added to the input current through a differentiation circuit and a pull-in type V-I conversion circuit, whereby the rising of a laser diode drive current is made abrupt. Furthermore, by increasing a gate potential of an input PchMOS transistor constituting the laser diode drive current amplifier by a differentiation circuit and a push-out type V-I conversion circuit in synchronization with the disconnection of an input current, the falling of a laser diode drive current is made abrupt.

Abstract translation: 本发明的激光二极管驱动装置可以在从小电流区域到大电流区域的范围内适当地缩短激光二极管驱动电流的上升时间和下降时间。 与从输入恒流源向激光二极管驱动电流放大器添加原始输入电流同步，微分电流通过微分电路和引入型VI转换电路加到输入电流上，由此上升 的激光二极管驱动电流突然。 此外，通过与输入电流的断开同步地通过微分电路和推出型VI转换电路来增加构成激光二极管驱动电流放大器的输入PchMOS晶体管的栅极电位，激光二极管驱动电流的下降 突然出现

公开(公告)号：US06339579B1

公开(公告)日：2002-01-15

申请号：US09287338

申请日：1999-04-07

Applicant: Yuichi Kamioka ,  Kenji Koishi ,  Yoshiyuki Miyabata ,  Naoyuki Nakamura ,  Kenichi Tatehara ,  Ikuo Hidaka ,  Kiyoshi Nakamori

Inventor： Yuichi Kamioka ,  Kenji Koishi ,  Yoshiyuki Miyabata ,  Naoyuki Nakamura ,  Kenichi Tatehara ,  Ikuo Hidaka ,  Kiyoshi Nakamori

IPC: G11B700

CPC classification number: G11B7/126 ,  H01S5/042 ,  H01S5/0683 ,  H01S5/0687

Abstract: In an optical disc apparatus, a semiconductor SLD driving device is mounted on an optical pickup in order to realize a high speed switching of drive current for a semiconductor laser diode (SLD), necessary for recording data. The SLD is placed. within 5 cm from the SLD driving device. The driving device becomes a heat source due to driving current of the SLD, and increases a temperature of the optical pickup. Since the temperature rises proportionally to power consumption, power saving is required. A voltage supplied to the driving device is controlled to be a minimum level necessary for keeping the driving device still working on basic functions. The SLD driving device is mounted to the optical pickup, and this driving device handles N pieces of input signals for setting semiconductor laser power and N pieces of switch-timing-input-signals for selecting respective input signals. A supplied voltage is controlled so that a voltage supplied to the output section of the driving device is a minimum value necessary for keeping the output section still operating. A power source is placed outside of the pickup.

Abstract translation: 在光盘装置中，半导体SLD驱动装置安装在光学拾取器上，以实现用于记录数据所需的用于半导体激光二极管（SLD）的驱动电流的高速切换。 放置SLD。 距离SLD驱动装置5厘米以内。 驱动装置由于SLD的驱动电流而成为热源，并且提高了光学拾取器的温度。 由于温度与功耗成比例上升，因此需要省电。 被提供给驱动装置的电压被控制为使驱动装置保持基本功能所必需的最低水平。 SLD驱动装置安装在光拾取器上，该驱动装置处理N条输入信号以设置半导体激光功率，并且N条开关定时输入信号用于选择各个输入信号。 控制供电电压，使得提供给驱动装置的输出部分的电压是保持输出部分仍然工作所需的最小值。 电源放置在拾音器外面。

公开(公告)号：US07173553B2

公开(公告)日：2007-02-06

申请号：US11235334

申请日：2005-09-27

Applicant: Kazuyuki Ohmi ,  Kenichi Tatehara

Inventor： Kazuyuki Ohmi ,  Kenichi Tatehara

IPC: H03M1/66

CPC classification number: H03M1/687 ,  H03M1/747 ,  H03M1/785

Abstract: A current summing type D/A converter having a configuration of two or more steps is provided. In a D/A converter block of the first step, by adding current segments, upper bits are D/A converted, and one of the current segments in the first step is further supplied to a D/A converter block in a second step to be shunt by the D/A converter block in the second step, so that lower bits are D/A converted. The output current in the first step and the output current in the second step are then added each other. According to the foregoing method, the D/A conversion may be performed without causing a differential linearity error.

Abstract translation: 提供具有两个或多个步骤的配置的电流求和型D / A转换器。 在第一步的D / A转换器模块中，通过加上当前段，高位进行D / A转换，第一步中的当前段之一进一步提供给D / A转换器模块， 在第二步中由D / A转换器模块分流，以便低位转换为D / A。 然后将第一步骤中的输出电流和第二步骤中的输出电流相加。 根据上述方法，可以执行D / A转换而不引起差分线性误差。

公开(公告)号：US06967381B2

公开(公告)日：2005-11-22

申请号：US10889104

申请日：2004-07-13

Applicant: Kenichi Tatehara ,  Norihide Kinugasa

Inventor： Kenichi Tatehara ,  Norihide Kinugasa

IPC: H01L21/822 ,  H01L21/8249 ,  H01L23/60 ,  H01L23/62 ,  H01L27/02 ,  H01L27/04 ,  H01L29/74 ,  H02H9/00 ,  H03K19/00 ,  H03K19/003

CPC classification number: H01L27/0266 ,  H01L27/0251 ,  H01L2924/0002 ,  H01L2924/00

Abstract: In order to improve the robustness against electrostatic discharge, when power source terminal and ground terminal are open, of a semiconductor device having a first, a second and a third inverter that are connected in a cascade arrangement, the semiconductor device is provided not only with a first input protection circuit for guiding positive electrostatic discharges, that are applied from outside to a signal input terminal, to a power source line, and a second input protection circuit for guiding negative electrostatic discharges, that are applied from outside to the signal input terminal, to a ground line, but also an internal protection circuit for guiding electrostatic discharges that have been guided by the first input protection circuit to the power source line and flow from a P-channel MOS transistor in the second inverter towards the third inverter, to the ground line.

Abstract translation: 为了提高静电放电的鲁棒性，当电源端子和接地端子断开时，具有以级联方式连接的第一，第二和第三反相器的半导体器件不仅具有 用于将从外部施加到信号输入端子的正静电放电引导到电源线的第一输入保护电路和用于引导负静电放电的第二输入保护电路，其从外部施加到信号输入端子 还有一个内部保护电路，用于将由第一输入保护电路引导的静电放电引导到电源线并从第二反相器中的P沟道MOS晶体管流向第三反相器，到 地线。

公开(公告)号：US06717968B2

公开(公告)日：2004-04-06

申请号：US10303831

申请日：2002-11-26

Applicant: Kenichi Tatehara ,  Kiyoshi Nakamori ,  Toshiya Akagi

Inventor： Kenichi Tatehara ,  Kiyoshi Nakamori ,  Toshiya Akagi

IPC: H01S310

CPC classification number: H01S5/042 ,  H01S5/0428 ,  H01S5/06835

Abstract: The laser drive device of this invention includes a laser, first and second current sources, a current amplifier, and first and second transistors. When the first transistor is OFF, a first current from the first current source is supplied to the current amplifier, where the current is amplified to generate a laser current to be supplied to the laser. Thus, the laser is turned ON. During this time, the second transistor is ON, allowing a second current to flow from a power supply node into the second current source. When the first transistor is ON, the entire or part of the first current flows into the second current source through the first transistor. This reduces the current supplied to the current amplifier and thus the laser current, resulting in turning OFF the laser. During this time, the second transistor is OFF. The values of the first and second currents are determined by a set current value. The value of the laser current supplied to the laser during the ON-state of it is determined by the first current. Therefore, by adjusting the set current value, a desired value of laser current can be supplied to the laser. Having the current amplifier, the values of the first and second currents are smaller than the value of the laser current. This suppresses an increase in power consumed by the first and second power sources and the first and second transistors when the laser current increases.

Abstract translation: 本发明的激光驱动装置包括激光器，第一和第二电流源，电流放大器以及第一和第二晶体管。 当第一晶体管截止时，来自第一电流源的第一电流被提供给电流放大器，其中电流被放大以产生要提供给激光器的激光电流。 因此，激光器被接通。 在此期间，第二晶体管导通，允许第二电流从电源节点流入第二电流源。 当第一晶体管导通时，第一电流的全部或部分通过第一晶体管流入第二电流源。 这降低了提供给电流放大器的电流，从而降低了激光电流，从而导致关闭激光器。 在此期间，第二晶体管截止。 第一和第二电流的值由设定的电流值确定。 在其导通状态期间提供给激光器的激光电流的值由第一电流确定。 因此，通过调整设定电流值，可以向激光器提供期望的激光电流值。 具有电流放大器时，第一和第二电流的值小于激光电流的值。 这抑制了当激光电流增加时由第一和第二电源和第一和第二晶体管消耗的功率的增加。

公开(公告)号：US06490301B1

公开(公告)日：2002-12-03

申请号：US09717141

申请日：2000-11-22

Applicant: Kenichi Tatehara ,  Kiyoshi Nakamori ,  Toshiya Akagi

Inventor： Kenichi Tatehara ,  Kiyoshi Nakamori ,  Toshiya Akagi

IPC: H01S310

CPC classification number: H01S5/042 ,  H01S5/0428 ,  H01S5/06835

Abstract: The laser drive device of this invention includes a laser, first and second current sources, a current amplifier, and first and second transistors. When the first transistor is OFF, a first current from the first current source is supplied to the current amplifier, where the current is amplified to generate a laser current to be supplied to the laser. Thus, the laser is turned ON. During this time, the second transistor is ON, allowing a second current to flow from a power supply node into the second current source. When the first transistor is ON, the entire or part of the first current flows into the second current source through the first transistor. This reduces the current supplied to the current amplifier and thus the laser current, resulting in turning OFF the laser. During this time, the second transistor is OFF. The values of the first and second currents are determined by a set current value. The value of the laser current supplied to the laser during the ON-state of it is determined by the first current. Therefore, by adjusting the set current value, a desired value of laser current can be supplied to the laser. Having the current amplifier, the values of the first and second currents are smaller than the value of the laser current. This suppresses an increase in power consumed by the first and second power sources and the first and second transistors when the laser current increases.

Abstract translation: 本发明的激光驱动装置包括激光器，第一和第二电流源，电流放大器以及第一和第二晶体管。 当第一晶体管截止时，来自第一电流源的第一电流被提供给电流放大器，其中电流被放大以产生要提供给激光器的激光电流。 因此，激光器被接通。 在此期间，第二晶体管导通，允许第二电流从电源节点流入第二电流源。 当第一晶体管导通时，整个或部分第一电流通过第一晶体管流入第二电流源。 这降低了提供给电流放大器的电流，从而降低了激光电流，从而导致关闭激光器。 在此期间，第二晶体管截止。 第一和第二电流的值由设定的电流值确定。 在其导通状态期间提供给激光器的激光电流的值由第一电流确定。 因此，通过调整设定电流值，可以向激光器提供期望的激光电流值。 具有电流放大器时，第一和第二电流的值小于激光电流的值。 这抑制了当激光电流增加时由第一和第二电源和第一和第二晶体管消耗的功率的增加。