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1. 发明授权

US06717449B2 Variable resistance circuit and application circuits using the variable resistance circuit 失效
标题翻译：可变电阻电路和应用电路采用可变电阻电路
公开(公告)号：US06717449B2
公开(公告)日：2004-04-06
申请号：US10272987
申请日：2002-10-17
申请人： Kosei Tamiya , Tetsuji Ueyama , Masashi Saito
发明人： Kosei Tamiya , Tetsuji Ueyama , Masashi Saito
IPC分类号： H03L500
CPC分类号： H03G1/007 , H03H11/245
摘要： A variable resistance circuit and application circuits using the same capable of offsetting the variance in the manufacture of integrated circuit and the influence of ambient temperatures, including: a control circuit having a plurality of constant-current output terminals, with a constant current ratio of the output terminals varied by signals applied to a control terminal; an operational amplifier; a resistor; and a plurality of MOS transistors having the gates thereof connected in common; and one output terminal of the control circuit being connected to one end of the resistor and to an inverted input terminal of the operational amplifier and the other output terminal being connected to the drain of one MOS transistor connected at the gate thereof to an output terminal of the operational amplifier and being connected to a non-inverted input terminal of the operational amplifier; and the other end of said resistor and the source of said one MOS transistor being connected to a reference voltage terminal. Said one MOS transistor is caused to operate in the triode region so as to use as an equivalent resistance the portion between the source and drain of the other MOS transistor connected at the gate thereof to the output terminal of the operational amplifier and at the source thereof directly or through a voltage copy circuit to the reference voltage terminal.
摘要翻译：一种可变电阻电路和使用该电路的可变电阻电路和应用电路，其能够抵消集成电路制造中的变化和环境温度的影响，包括：具有多个恒定电流输出端子的控制电路，其恒定电流比为输出端子由施加到控制端子的信号而变化; 运算放大器; 一个电阻; 以及多个MOS晶体管，其栅极共同连接; 并且控制电路的一个输出端子连接到电阻器的一端和运算放大器的反相输入端子，另一个输出端子连接到在其栅极处连接的一个MOS晶体管的漏极到输出端子运算放大器并连接到运算放大器的非反相输入端; 并且所述电阻器的另一端和所述一个MOS晶体管的源极连接到参考电压端子。使所述一个MOS晶体管在三极管区域中工作，以便将连接在其栅极处的另一个MOS晶体管的源极和漏极之间的部分用作运算放大器的输出端的源极和源极之间的等效电阻直接或通过电压复制电路到参考电压端子。

2. 发明授权

US07710469B2 Image acquisition apparatus 失效
标题翻译：图像采集装置
公开(公告)号：US07710469B2
公开(公告)日：2010-05-04
申请号：US11634271
申请日：2006-12-06
申请人： Tetsuji Ueyama
发明人： Tetsuji Ueyama
IPC分类号： H04N5/262 , H04N5/217
CPC分类号： H04N5/772 , H04N5/23296 , H04N5/3572 , H04N9/804
摘要： An image acquisition apparatus includes an optical system having such distortion aberration characteristics as a central region is expanded and a peripheral region is compressed. An imaging element converts a subject image formed image data. A first memory stores filter factors which are used for interrupting a spatial frequency exceeding a Nyquist frequency of the image data. A second memory stores parameters which define an outer edge of a Nyquist image region. A filter factor setting circuit judges whether each pixel position of the image data is included in the Nyquist image region based on the parameter, and reads the filter factors from the first memory when each pixel position is included. A filter circuit executes filter processing with respect to the image data in accordance with the read filter factors. A distortion correcting circuit corrects the distortion aberration characteristics with respect to the image data.
摘要翻译：图像获取装置包括具有中心区域的畸变像差特性的光学系统，并且外围区域被压缩。成像元件转换被摄体图像形成的图像数据。第一存储器存储用于中断超过图像数据的奈奎斯特频率的空间频率的滤波器因子。第二存储器存储限定奈奎斯特图像区域的外边缘的参数。滤波器因子设置电路基于参数来判断图像数据的每个像素位置是否包括在奈奎斯特图像区域中，并且当包括每个像素位置时从第一存储器读取滤波器因子。滤波器电路根据读取的滤波器因子执行关于图像数据的滤波处理。失真校正电路相对于图像数据校正畸变像差特性。

3. 发明申请

US20070153097A1 Image acquisition apparatus 失效
标题翻译：图像采集装置
公开(公告)号：US20070153097A1
公开(公告)日：2007-07-05
申请号：US11634271
申请日：2006-12-06
申请人： Tetsuji Ueyama
发明人： Tetsuji Ueyama
IPC分类号： H04N5/76
CPC分类号： H04N5/772 , H04N5/23296 , H04N5/3572 , H04N9/804
摘要： An image acquisition apparatus includes an optical system having such distortion aberration characteristics as a central region is expanded and a peripheral region is compressed. An imaging element converts a subject image formed image data. A first memory stores filter factors which are used for interrupting a spatial frequency exceeding a Nyquist frequency of the image data. A second memory stores parameters which define an outer edge of a Nyquist image region. A filter factor setting circuit judges whether each pixel position of the image data is included in the Nyquist image region based on the parameter, and reads the filter factors from the first memory when each pixel position is included. A filter circuit executes filter processing with respect to the image data in accordance with the read filter factors. A distortion correcting circuit corrects the distortion aberration characteristics with respect to the image data.
摘要翻译：图像获取装置包括具有中心区域的畸变像差特性的光学系统，并且外围区域被压缩。成像元件转换被摄体图像形成的图像数据。第一存储器存储用于中断超过图像数据的奈奎斯特频率的空间频率的滤波器因子。第二存储器存储限定奈奎斯特图像区域的外边缘的参数。滤波器因子设置电路基于参数来判断图像数据的每个像素位置是否包括在奈奎斯特图像区域中，并且当包括每个像素位置时从第一存储器读取滤波器因子。滤波器电路根据读取的滤波器因子执行关于图像数据的滤波处理。失真校正电路相对于图像数据校正畸变像差特性。

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