专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US08541733B2 Laser light detection circuit 有权
标题翻译：激光检测电路
公开(公告)号：US08541733B2
公开(公告)日：2013-09-24
申请号：US13087101
申请日：2011-04-14
申请人： Rui Kurihara , Takahiro Kawashima
发明人： Rui Kurihara , Takahiro Kawashima
IPC分类号： H03F3/08 , H01J40/14 , H03F3/45 , H03F3/28
CPC分类号： G11B7/126 , G11B7/005 , H01S5/06832
摘要： The invention provides a laser light detection circuit that prevents a peak output occurring when the circuit switches between the operation stop mode and the operation mode so as to prevent the breakdown or malfunction of the next-connected circuit. A laser light detection circuit has a differential amplifier that amplifies and outputs a signal corresponding to the intensity of laser light, a drive transistor having a base to which the output of the differential amplifier is applied, a second constant-current source connected to the emitter of the drive transistor, an output transistor having a base connected to the emitter of the drive transistor, a bypass transistor connected between the emitter of the drive transistor and the ground, and a control circuit. The control circuit forms a bypass current route from the second constant-current source to the ground through the bypass transistor by turning on the bypass transistor when the circuit switches from the operation stop mode to the operation mode.
摘要翻译：本发明提供了一种激光检测电路，其防止当电路在操作停止模式和操作模式之间切换时出现峰值输出，以防止下一个连接电路的故障或故障。激光检测电路具有放大并输出与激光强度相对应的信号的差分放大器，具有施加了差分放大器的输出的基极的驱动晶体管，连接到发射极的第二恒流源驱动晶体管的输出晶体管，其基极连接到驱动晶体管的发射极，连接在驱动晶体管的发射极与地之间的旁路晶体管和控制电路。当电路从操作停止模式切换到操作模式时，通过接通旁路晶体管，控制电路通过旁路晶体管形成从第二恒定电流源到地的旁路电流路径。

2. 发明授权

US08279002B2 Variable gain amplifier circuit 有权
标题翻译：可变增益放大电路
公开(公告)号：US08279002B2
公开(公告)日：2012-10-02
申请号：US12909763
申请日：2010-10-21
申请人： Takahiro Kawashima , Rui Kurihara
发明人： Takahiro Kawashima , Rui Kurihara
IPC分类号： H03G3/20
CPC分类号： H03G1/0088 , G11B7/13 , H03F3/087 , H03F3/45475 , H03F2203/45526
摘要： A variable gain amplifier circuit includes: an operational amplifier having a non-inverting input terminal applied with a predetermined voltage; a feedback resistor having one end connected to an inverting input terminal of the operational amplifier and the other end connected to an output terminal of the operational amplifier; and a variable resistor having one end applied with an input voltage and the other end connected to the inverting input terminal of the operational amplifier.
摘要翻译：可变增益放大器电路包括：具有施加预定电压的非反相输入端的运算放大器; 反馈电阻器，其一端连接到运算放大器的反相输入端子，另一端连接到运算放大器的输出端子; 以及可变电阻器，其一端施加有输入电压，另一端连接到运算放大器的反相输入端。

3. 发明申请

US20110260789A1 VARIABLE GAIN AMPLIFIER CIRCUIT 有权
标题翻译：可变增益放大器电路
公开(公告)号：US20110260789A1
公开(公告)日：2011-10-27
申请号：US12909763
申请日：2010-10-21
申请人： Takahiro Kawashima , Rui Kurihara
发明人： Takahiro Kawashima , Rui Kurihara
IPC分类号： H03F1/34
CPC分类号： H03G1/0088 , G11B7/13 , H03F3/087 , H03F3/45475 , H03F2203/45526
摘要： A variable gain amplifier circuit includes: an operational amplifier having a non-inverting input terminal applied with a predetermined voltage; a feedback resistor having one end connected to an inverting input terminal of the operational amplifier and the other end connected to an output terminal of the operational amplifier; and a variable resistor having one end applied with an input voltage and the other end connected to the inverting input terminal of the operational amplifier.
摘要翻译：可变增益放大器电路包括：具有施加预定电压的非反相输入端的运算放大器; 反馈电阻器，其一端连接到运算放大器的反相输入端子，另一端连接到运算放大器的输出端子; 以及可变电阻器，其一端施加有输入电压，另一端连接到运算放大器的反相输入端。

4. 发明申请

US20120236887A1 OPTICAL PICKUP APPARATUS, INTEGRATED CIRCUIT, AND METHOD FOR CONTROLLING LASER OUTPUT OF OPTICAL PICKUP APPARATUS 有权
标题翻译：光学拾取装置，集成电路和控制光学拾取装置的激光输出的方法
公开(公告)号：US20120236887A1
公开(公告)日：2012-09-20
申请号：US13422242
申请日：2012-03-16
申请人： Hisayoshi Uchiyama , Masashi Arai , Hiroshi Kojima , Rui Kurihara
发明人： Hisayoshi Uchiyama , Masashi Arai , Hiroshi Kojima , Rui Kurihara
IPC分类号： H01S3/10
CPC分类号： G11B7/1263 , G11B2007/0006 , G11B2007/0013 , H01S5/042 , H01S5/0683
摘要： An optical-pickup apparatus includes: a first laser light source including a first laser diode to emit a laser beam having a first wavelength, and a back-monitor photodetector to receive the laser beam emitted in a backward direction, not being an optical-disc direction, and output a first monitor signal; a second laser-light source including a second laser diode to emit a laser beam having a second wavelength; a light-receiving circuit including a front-monitor photodetector to receive the laser beam emitted in a forward direction, being the optical-disc direction, and output a second monitor signal, and a switch circuit to be inputted with the first and second monitor signals, and output the first or second monitor signal according to a switch signal; and first and second drive circuits to drive the first and second laser diodes according to the first and second monitor signals outputted from the light-receiving circuit, respectively.
摘要翻译：一种光拾取装置，包括：第一激光源，包括发射具有第一波长的激光束的第一激光二极管和用于接收沿反向发射的激光束的后监视器光检测器，不是光盘方向，并输出第一监视信号; 包括第二激光二极管以发射具有第二波长的激光束的第二激光光源; 光接收电路，包括用于接收沿正向发射的激光束的前监视器光电检测器，作为光盘方向，并输出第二监视信号;以及开关电路，输入第一和第二监视信号并根据开关信号输出第一或第二监视信号; 以及分别根据从光接收电路输出的第一和第二监视信号来驱动第一和第二激光二极管的第一和第二驱动电路。

5. 发明授权

US08427917B2 Optical pickup apparatus, integrated circuit, and method for controlling laser output of optical pickup apparatus 有权
标题翻译：光拾取装置，集成电路和控制光拾取装置的激光输出的方法
公开(公告)号：US08427917B2
公开(公告)日：2013-04-23
申请号：US13422242
申请日：2012-03-16
申请人： Hisayoshi Uchiyama , Masashi Arai , Hiroshi Kojima , Rui Kurihara
发明人： Hisayoshi Uchiyama , Masashi Arai , Hiroshi Kojima , Rui Kurihara
IPC分类号： G11B27/36 , G11B7/00 , H01S3/00
CPC分类号： G11B7/1263 , G11B2007/0006 , G11B2007/0013 , H01S5/042 , H01S5/0683
摘要： An optical-pickup apparatus includes: a first laser light source including a first laser diode to emit a laser beam having a first wavelength, and a back-monitor photodetector to receive the laser beam emitted in a backward direction, not being an optical-disc direction, and output a first monitor signal; a second laser-light source including a second laser diode to emit a laser beam having a second wavelength; a light-receiving circuit including a front-monitor photodetector to receive the laser beam emitted in a forward direction, being the optical-disc direction, and output a second monitor signal, and a switch circuit to be inputted with the first and second monitor signals, and output the first or second monitor signal according to a switch signal; and first and second drive circuits to drive the first and second laser diodes according to the first and second monitor signals outputted from the light-receiving circuit, respectively.
摘要翻译：一种光拾取装置，包括：第一激光源，包括发射具有第一波长的激光束的第一激光二极管和用于接收沿反向发射的激光束的后监视器光检测器，不是光盘方向，并输出第一监视信号; 包括第二激光二极管以发射具有第二波长的激光束的第二激光光源; 光接收电路，包括用于接收沿正向发射的激光束的前监视器光电检测器，作为光盘方向，并输出第二监视信号;以及开关电路，输入第一和第二监视信号并根据开关信号输出第一或第二监视信号; 以及分别根据从光接收电路输出的第一和第二监视信号来驱动第一和第二激光二极管的第一和第二驱动电路。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式