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    • 23. 发明授权
    • Analog to digital converter using remainder feedback loop
    • 使用余数反馈回路的模数转换器
    • US06333709B2
    • 2001-12-25
    • US09741197
    • 2000-12-21
    • Yoshihiro Miyamoto
    • Yoshihiro Miyamoto
    • H03M112
    • G06F7/5013G06F2207/482H03K19/0813H03K19/23H03M1/129H03M1/144H03M1/145H03M1/403H03M1/42H03M1/46H03M1/60H03M1/667H03M1/68
    • According to the present invention, various logic circuits, AD converters, DA converters and counter circuits can be constituted with a small number of transistors by employing a capacitive coupling circuit. An analog/digital converter comprises: an input terminal, for which analog input is provided; an output terminal of N (N is a plural number) bits, for which binary output is provided; and N unit circuits arranged in parallel, each including an input capacitor having one electrode connected to the input terminal, a first inverter connected to the other electrode of the input capacitor, and a second inverter connected to the first inverter, wherein outputs of the second inverters of the unit circuits are respectively provided for the output terminals, wherein inverted outputs of the outputs for the unit circuits are fed back via feedback capacitors to respective input terminals of the first inverters of the unit circuits corresponding to lower bits, and wherein a capacitance of the feedback capacitor, which corresponds to the inverted output of the M-th (M is an integer) unit circuit from the most significant bit, is ½M times a capacitance of the input capacitor of the unit circuit that is fed back.
    • 根据本发明,通过采用电容耦合电路,各种逻辑电路,AD转换器,DA转换器和计数器电路可以由少量晶体管构成。 一种模拟/数字转换器,包括:输入端,为其提供模拟输入; N(N是多个)位的输出端,提供二进制输出; 和N个单位电路,每个均包括一个输入电容器,该输入电容器具有连接到输入端子的一个电极,连接到输入电容器的另一个电极的第一反相器和连接到第一反相器的第二反相器,其中第二个 单元电路的逆变器分别设置用于输出端子,其中用于单位电路的输出的反相输出通过反馈电容器反馈到对应于低位的单元电路的第一反相器的相应输入端子,并且其中电容 对应于来自最高有效位的第M(M为整数)单位电路的反相输出的反馈电容是反馈的单位电路的输入电容器的电容的1/2倍。
    • 24. 发明授权
    • Logic circuit utilizing capacitive coupling, an AD converter and a DA
converter
    • 使用电容耦合的逻辑电路,AD转换器和DA转换器
    • US6043675A
    • 2000-03-28
    • US888900
    • 1997-07-07
    • Yoshihiro Miyamoto
    • Yoshihiro Miyamoto
    • H03M1/44G06F7/50H03K5/08H03K19/08H03K19/23H03M1/12H03M1/14H03M1/40H03M1/42H03M1/46H03M1/60H03M1/66H03M1/68H03M1/74H03K19/20
    • G06F7/5013H03K19/0813H03K19/23H03M1/129H03M1/144H03M1/145H03M1/403H03M1/42H03M1/46H03M1/60H03M1/667H03M1/68G06F2207/482
    • According to the present invention, various logic circuits, AD converters, DA converters and counter circuits can be constituted with a small number of transistors by employing a capacitive coupling circuit. An analog/digital converter comprises: an input terminal, for which analog input is provided; an output terminal of N (N is a plural number) bits, for which binary output is provided; and N unit circuits arranged in parallel, each including an input capacitor having one electrode connected to the input terminal, a first inverter connected to the other electrode of the input capacitor, and a second inverter connected to the first inverter, wherein outputs of the second inverters of the unit circuits are respectively provided for the output terminals, wherein inverted outputs of the outputs for the unit circuits are fed back via feedback capacitors to respective input terminals of the first inverters of the unit circuits corresponding to lower bits, and wherein a capacitance of the feedback capacitor, which corresponds to the inverted output of the M-th (M is an integer) unit circuit from the most significant bit, is 1/2.sup.M times a capacitance of the input capacitor of the unit circuit that is fed back.
    • 根据本发明,通过采用电容耦合电路,各种逻辑电路,AD转换器,DA转换器和计数器电路可以由少量晶体管构成。 一种模拟/数字转换器,包括:输入端,为其提供模拟输入; N(N是多个)位的输出端,提供二进制输出; 和N个单位电路,每个均包括一个输入电容器,该输入电容器具有连接到输入端子的一个电极,连接到输入电容器的另一个电极的第一反相器和连接到第一反相器的第二反相器,其中第二个 单元电路的逆变器分别设置用于输出端子,其中用于单位电路的输出的反相输出通过反馈电容器反馈到对应于低位的单元电路的第一反相器的相应输入端子,并且其中电容 对应于来自最高有效位的第M(M为整数)单位电路的反相输出的反馈电容为+ E,fra 1/2 + EE M倍, 反馈的单元电路。
    • 25. 发明授权
    • Image signal processing method and image signal processing device
    • 图像信号处理方法及图像信号处理装置
    • US5852648A
    • 1998-12-22
    • US848727
    • 1997-05-22
    • Yoshihiro MiyamotoMasaji Dohi
    • Yoshihiro MiyamotoMasaji Dohi
    • H04N5/14G06T5/00G06T5/40G09G5/36H04N7/18G01N23/04
    • G06T5/40G06T5/009G06T2207/10048G06T2207/10116G06T2207/30021
    • A display signal of high contrast is generated by processing an image signal that is acquired from a camera such as an infra-red or X-ray camera. The method involves: dividing a screen into polygons, finding signal intensities of pixels in these polygons by interpolation from the original image signal intensities of pixels corresponding to the vertices of these polygons as a signal intensity LF of a low frequency component; finding the signal intensities HF of high frequency components of these pixels by performing calculation to subtract the signal LF of this low frequency component from the original image signal S at each pixel; finding, for the signal intensities HF of these high frequency components, from a histogram showing the rate of occurrence numbers of the respective signal intensities, a transformation function IHS including the integrated values of these rate of occurrence numbers up to respective signal intensities; transforming the signal intensities of the high frequency components HF into display signal intensities DHF in accordance with this transformation function IHS; and finding the display signal DP of these pixels by adding to the display signals DHF of these high frequency components obtained by this transformation a signal obtained by multiplying the signal of the low frequency component LF by a weighting coefficient .beta. of less than 1.
    • 通过处理从诸如红外或X射线照相机的相机获取的图像信号来产生高对比度的显示信号。 该方法包括:将屏幕划分成多边形,通过从对应于这些多边形的顶点的像素的原始图像信号强度的内插,作为低频分量的信号强度LF,通过内插求出这些多边形中的像素的信号强度; 通过进行计算,从每个像素处的原始图像信号S中减去该低频分量的信号LF,求出这些像素的高频分量的信号强度HF; 对于这些高频分量的信号强度HF,从表示各信号强度的出现次数的直方图,求出包括这些发生频率的积分值直到各信号强度的变换函数IHS; 根据该变换函数IHS将高频分量HF的信号强度变换为显示信号强度DHF; 并且通过将通过该变换获得的这些高频分量的显示信号DHF加到通过将低频分量LF的信号乘以小于1的加权系数β而获得的信号,来找到这些像素的显示信号DP。