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公开(公告)号：US09632374B2
公开(公告)日：2017-04-25
申请号：US14129582
申请日：2012-06-11
申请人： Kazuhiro Murakami
发明人： Kazuhiro Murakami
IPC分类号： G02F1/1362 , H03K19/003 , H02H9/04 , H01L27/02
CPC分类号： G02F1/136204 , H01L27/0251 , H02H9/043 , H03K19/00315
摘要： An overvoltage protection portion (14) includes a transistor (P1) that achieves continuity with an input voltage (VIN) used as an output voltage (VOUT) to an internal circuit when the input voltage (VIN) applied to an external terminal (T1) is not in an overvoltage state. The overvoltage protection portion (14) also includes: a transistor (P2) operating as a short circuit that short-circuits the source and the gate of the transistor (P1) and that interrupts the input voltage (VIN) when the input voltage (VIN) is in the overvoltage state; a resistor (R2); and a Zener diode (ZD1). The overvoltage protection portion (14) also includes: a transistor (NTr1) operating as a bypass circuit that supplies a constant output voltage (VOUT) from the external terminal (T1) to the internal circuit when the input voltage (VIN) is brought into the overvoltage state; a resistor (R3); and a Zener diode (ZD2).
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公开(公告)号：US08947056B2
公开(公告)日：2015-02-03
申请号：US13463906
申请日：2012-05-04
摘要： A switching transistor is arranged between a switching (SW) terminal and the ground terminal. An error amplifier amplifies the difference between the feedback voltage VFB that corresponds to the output voltage VOUT with a predetermined reference voltage VREF so as to generate an error voltage VERR. A pulse modulator generates a pulse signal SP having a duty ratio that is adjusted according to the error voltage VERR. A driver drives a switching transistor according to the pulse signal SP. An overvoltage detection circuit generates an overvoltage protection (OVP) signal which is asserted when the voltage at the switching (SW) terminal becomes higher than a predetermined threshold voltage. When the OVP signal is asserted, a control circuit performs a predetermined protection operation.
摘要翻译： 开关晶体管布置在开关（SW）端子和接地端子之间。 误差放大器将对应于输出电压VOUT的反馈电压VFB与预定参考电压VREF放大，以产生误差电压VERR。 脉冲调制器产生具有根据误差电压VERR调整的占空比的脉冲信号SP。 驱动器根据脉冲信号SP驱动开关晶体管。 过电压检测电路产生当开关（SW）端子处的电压变得高于预定阈值电压时被断言的过压保护（OVP）信号。 当OVP信号被置位时，控制电路执行预定的保护操作。
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公开(公告)号：US20120286756A1
公开(公告)日：2012-11-15
申请号：US13463906
申请日：2012-05-04
IPC分类号： G05F1/10
摘要： A switching transistor is arranged between a switching (SW) terminal and the ground terminal. An error amplifier amplifies the difference between the feedback voltage VFB that corresponds to the output voltage VOUT with a predetermined reference voltage VREF so as to generate an error voltage VERR. A pulse modulator generates a pulse signal SP having a duty ratio that is adjusted according to the error voltage VERR. A driver drives a switching transistor according to the pulse signal SP. An overvoltage detection circuit generates an overvoltage protection (OVP) signal which is asserted when the voltage at the switching (SW) terminal becomes higher than a predetermined threshold voltage. When the OVP signal is asserted, a control circuit performs a predetermined protection operation.
摘要翻译： 开关晶体管布置在开关（SW）端子和接地端子之间。 误差放大器将对应于输出电压VOUT的反馈电压VFB与预定参考电压VREF放大，以产生误差电压VERR。 脉冲调制器产生具有根据误差电压VERR调整的占空比的脉冲信号SP。 驱动器根据脉冲信号SP驱动开关晶体管。 过电压检测电路产生当开关（SW）端子处的电压变得高于预定阈值电压时被断言的过压保护（OVP）信号。 当OVP信号被置位时，控制电路执行预定的保护操作。
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4.发明申请SWITCHING REGULATOR CONTROL CIRCUIT, SWITCHING REGULATOR, ELECTRONIC APPLIANCE, SWITCHING POWER SUPPLY DEVICE, AND TELEVISION RECEIVER 有权开关稳压器控制电路，开关稳压器，电子设备，开关电源装置和电视接收器公开(公告)号：US20120286752A1
公开(公告)日：2012-11-15
申请号：US13469329
申请日：2012-05-11
IPC分类号： G05F1/10
CPC分类号： H02M3/156 , H02M2001/0029 , H02M2001/009 , H03K17/163 , H04N5/63
摘要： A high-side variable current source and a high-side transistor are provided in series between a supply power terminal of a control circuit and a gate of a switching transistor. A low-side variable current source and a low-side transistor are provided in series between the gate of the switching transistor and a ground terminal. A slew rate controller controls the current value of at least one of the high-side and low-side variable current sources according to the state of a setting terminal. A switching power supply device has a plurality of output transistors connected in parallel with one another and a controller that generates control signals turning on and off the output transistors at a predetermined frequency so as to generate a desired output voltage from an input voltage and supply the output voltage to a load. The controller determines which output transistor to drive according to the magnitude of the load.
摘要翻译： 高侧可变电流源和高侧晶体管串联设置在控制电路的电源端和开关晶体管的栅极之间。 低侧可变电流源和低侧晶体管串联设置在开关晶体管的栅极和接地端子之间。 压摆率控制器根据设定端子的状态控制高侧和低侧可变电流源中的至少一个的电流值。 开关电源装置具有彼此并联连接的多个输出晶体管和控制器，其以预定频率产生导通和截止输出晶体管的控制信号，从而从输入电压产生期望的输出电压，并将 输出电压到负载。 控制器根据负载的大小决定要驱动的输出晶体管。
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公开(公告)号：US20120229707A1
公开(公告)日：2012-09-13
申请号：US13413833
申请日：2012-03-07
申请人： Kazuhiro Murakami
发明人： Kazuhiro Murakami
CPC分类号： H02M3/156 , H02M2001/0022 , H04N5/63
摘要： A DC/DC converter 10 has a high-side transistor QH as a switching element and a low-side transistor QL as a synchronous rectifier element. A first primary electrode D and secondary primary electrode S of the high-side transistor QH are connected to an input voltage VIN and an external terminal T1, respectively. A detection transistor QD is provided in a row with the high-side transistor QH, and the ON voltage of the high-side transistor QH when ON is output as detection voltage VQD from the detection transistor QD. The output detection voltage VQD is added to a feedback voltage VFB1 by an adder CB, and inputted to a comparator CMP1. The ON period of a one-shot pulse PS1 outputted from the comparator CMP1 is regulated so as to be in direct proportion to the sum of the detection voltage VQD and the feedback voltage VFB1.
摘要翻译： DC / DC转换器10具有作为开关元件的高侧晶体管QH和作为同步整流元件的低侧晶体管QL。 高侧晶体管QH的第一初级电极D和次级主电极S分别连接到输入电压VIN和外部端子T1。 检测晶体管QD与高侧晶体管QH成一行地设置，并且当从检测晶体管QD输出ON作为检测电压VQD时，高侧晶体管QH的导通电压。 输出检测电压VQD由加法器CB加到反馈电压VFB1，并输入到比较器CMP1。 从比较器CMP1输出的单触发脉冲PS1的导通期间被调整为与检测电压VQD和反馈电压VFB1的和成正比。
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公开(公告)号：US20110235489A1
公开(公告)日：2011-09-29
申请号：US13155740
申请日：2011-06-08
申请人： Masaharu IMURA , Kazuhiro MURAKAMI
发明人： Masaharu IMURA , Kazuhiro MURAKAMI
IPC分类号： G11B7/125
CPC分类号： G11B23/40 , G11B7/1263
摘要： An image formation width calculation circuit and an image formation shift amount determination circuit are provided so that, before a visible image is formed, an effective image formation diameter of an image formation laser spot is measured, and based on the result, a shift amount of the laser spot is adjusted. An optical pickup which forms a plurality of laser spots on an optical disk is also provided. An image formation focus control laser power control circuit and an image formation laser power control circuit are also provided. A focus control laser spot is located ahead of the image formation laser spot.
摘要翻译： 提供图像形成宽度计算电路和图像形成偏移量确定电路，使得在可视图像形成之前，测量图像形成激光光斑的有效图像形成直径，并且基于该结果， 激光点被调整。 还提供了在光盘上形成多个激光点的光学拾取器。 还提供了图像形成聚焦控制激光功率控制电路和成像激光功率控制电路。 聚焦控制激光点位于图像形成激光点的前方。
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公开(公告)号：US20110133711A1
公开(公告)日：2011-06-09
申请号：US12962685
申请日：2010-12-08
申请人： Kazuhiro Murakami , Mikiya Doi , Yosuke Fukumoto
发明人： Kazuhiro Murakami , Mikiya Doi , Yosuke Fukumoto
IPC分类号： G05F1/00
CPC分类号： H02M1/32 , H02M1/08 , H02M3/156 , H03K17/0822
摘要： The semiconductor device according to the present invention has an n-channel output transistor wherein an input voltage is impressed on a drain, and a pulsed switching voltage that corresponds to a switching drive of the transistor is brought out from a source; a bootstrap circuit for generating a boost voltage enhanced by a predetermined electric potential above the switching voltage; an internal circuit for receiving a supply of the boost voltage to generate a switching drive signal, and supplying the signal to a gate of the output transistor; an overvoltage protection circuit for monitoring an electric potential difference between the switching voltage and the boost voltage, and generating an overvoltage detection signal; and a switching element for establishing/blocking electrical conduction between the internal circuit and the end impressed with the boost voltage, in accordance with the overvoltage detection signal.
摘要翻译： 根据本发明的半导体器件具有n沟道输出晶体管，其中输入电压施加在漏极上，并且从源极引出对应于晶体管的开关驱动的脉冲切换电压; 一个自举电路，用于产生一高于开关电压的预定电位增强的升压电压; 内部电路，用于接收升压电压的供给以产生开关驱动信号，并将该信号提供给输出晶体管的栅极; 用于监视开关电压和升压电压之间的电位差的过电压保护电路，以及产生过电压检测信号; 以及用于根据过电压检测信号建立/阻断内部电路和施加有升压电压的端部之间的导通的开关元件。
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8.发明申请OPERATIONAL AMPLIFIER AND LIQUID CRYSTAL DRIVE DEVICE USING SAME, AS WELL AS PARAMETER SETTING CIRCUIT, SEMICONDUCTOR DEVICE, AND POWER SUPPLY UNIT 有权作为参数设定电路，半导体器件和电源单元使用相同的操作放大器和液晶驱动器件公开(公告)号：US20110128277A1
公开(公告)日：2011-06-02
申请号：US12951827
申请日：2010-11-22
申请人： Kazuhiro Murakami
发明人： Kazuhiro Murakami
CPC分类号： H03F3/45183 , G09G3/3655 , G09G3/3677 , G09G3/3688 , H03F3/3022 , H03F2203/45692
摘要： The operational amplifier according to the present invention has at least one differential input part for generating a voltage signal corresponding to an electric potential difference between a positive-phase input signal and a negative-phase input signal by using a differential pair configured from a pair of transistors; an output part for generating and outputting an output signal of a logic level corresponding to the voltage signal generated by the differential input part; at least one auxiliary current generator for detecting a sudden change in the positive-phase input signal or the negative-phase input signal and generating an auxiliary current; and a drive current generator for adding together a predetermined reference current and the auxiliary current and generating a drive current of the differential input part.
摘要翻译： 根据本发明的运算放大器具有至少一个差分输入部分，用于通过使用由一对输入信号构成的差分对来产生对应于正相输入信号和负相输入信号之间的电位差的电压信号 晶体管 输出部分，用于产生和输出与由差分输入部分产生的电压信号相对应的逻辑电平的输出信号; 至少一个辅助电流发生器，用于检测正相输入信号或负相输入信号的突然变化并产生辅助电流; 以及用于将预定参考电流和辅助电流相加并产生差分输入部分的驱动电流的驱动电流发生器。
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公开(公告)号：US20080256781A1
公开(公告)日：2008-10-23
申请号：US12081494
申请日：2008-04-16
CPC分类号： B21D39/032 , Y10T29/49943 , Y10T29/53996
摘要： The present invention provides a joining method of metal plates, which can connect two metal plates without a projection in a surface of the metal plates and a gap, and a joined unit having metal plates which are connected without a projection in a surface of the metal plates and a gap between the metal plates. The joined unit has a pair of metal plates. One of the metal plates has a hole, and another metal plate has a projection having a height less than a thickness of the one of the metal plates. The projection passes through the hole, the one of the metal plates is placed on the other of the metal plates each other, and a central part of an end surface of the projection is crushed in the hole. Thereby, the metal plates are joined to each other, and the joined unit can be provided.
摘要翻译： 本发明提供一种金属板的接合方法，其可以在金属板的表面和间隙中连接两个金属板而不具有突起，并且具有金属板的接合单元，金属板在金属的表面中没有突起连接 板和金属板之间的间隙。 连接单元具有一对金属板。 金属板中的一个具有孔，另一金属板具有高度小于该金属板之一的厚度的突起。 突起穿过孔，金属板之一彼此放置在另一个金属板上，突起的端面的中心部分在孔中被压碎。 由此，金属板彼此接合，并且可以设置接合单元。
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公开(公告)号：US20080156776A1
公开(公告)日：2008-07-03
申请号：US12073534
申请日：2008-03-06
申请人： Kazuhiro Murakami
发明人： Kazuhiro Murakami
IPC分类号： B23K11/16
CPC分类号： B23K11/002 , B23K11/163
摘要： The resistance welding method of welding two objects together includes the steps of: clamping the objects between a pair of electrodes; and applying a current between the electrodes while the objects are pressed to bring them close to each other to allow a contacting surface between them to generate heat. One object includes a core member and a plated layer coating the core member and having a melting point lower than that of a metal constituting an outer surface of the core member. The objects are clamped between the electrodes and the contacting surface are allowed to generate heat to melt the plated layer to weld the outer surface of the core member of the one object and a base member of another object together. At least the outer surface of the core member and the base member are made of respective metals, between which no intermetallic compound is formed.
摘要翻译： 将两个物体焊接在一起的电阻焊接方法包括以下步骤：将物体夹在一对电极之间; 并且在按压物体之间在电极之间施加电流以使它们彼此靠近以允许它们之间的接触表面产生热量。 一个目的包括芯构件和涂覆芯构件的镀层，其熔点低于构成芯构件的外表面的金属的熔点。 物体被夹在电极之间，允许接触表面产生热量以熔化镀层，以将一个物体的芯部件的外表面和另一个物体的基底部件焊接在一起。 至少芯构件的外表面和基底构件由各自的金属制成，在其之间不形成金属间化合物。
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