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公开(公告)号：EP1033661A3
公开(公告)日：2010-09-29
申请号：EP00103906.4
申请日：2000-02-24
摘要： An analog input signal that is sampled at a predetermined rate is multiplied by a corresponding binary code sequence, i.e. "+1" or "-1" by the multiplier. The output of this multiplier is applied in conjunction with a signal supplied by the negative feed back circuit to the analog integrator. The quantization circuit quantizes the output signal of the analog integrator into N levels and outputs a digital word. This digital word is delayed by a unit time interval by a digital delay circuit and then processed by the above mentioned negative feed back circuit. As a result of this signal magnitude reducing process, the required integrating capacitance can be minimized without risks of saturation effects. Additionally, the output is already in digital form as required by the subsequent system blocks.
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公开(公告)号：EP1033661A2
公开(公告)日：2000-09-06
申请号：EP00103906.4
申请日：2000-02-24
IPC分类号： G06F17/15
摘要： An analog input signal that is sampled at a predetermined rate is multiplied by a corresponding binary code sequence, i.e. "+1" or "-1" by the multiplier. The output of this multiplier is applied in conjunction with a signal supplied by the negative feed back circuit to the analog integrator. The quantization circuit quantizes the output signal of the analog integrator into N levels and outputs a digital word. This digital word is delayed by a unit time interval by a digital delay circuit and then processed by the above mentioned negative feed back circuit. As a result of this signal magnitude reducing process, the required integrating capacitance can be minimized without risks of saturation effects. Additionally, the output is already in digital form as required by the subsequent system blocks.
摘要翻译： 以预定速率采样的模拟输入信号乘以相应的二进制码序列，即乘法器为“+1”或“-1”。 该乘法器的输出结合由负反馈电路提供给模拟积分器的信号。 量化电路将模拟积分器的输出信号量化为N个电平并输出数字字。 该数字字由数字延迟电路延迟单位时间间隔，然后由上述负反馈电路处理。 作为该信号幅度降低处理的结果，可以最小化所需的积分电容，而不会产生饱和效应的风险。 此外，输出已经是随后的系统块所要求的数字形式。
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3.发明公开Analog signal processing device and correlation computing device 失效Analoge Signalverarbeitungseinrichtung und Korrelationsberechnungseinrichtung
公开(公告)号：EP0812061A2
公开(公告)日：1997-12-10
申请号：EP97303888.8
申请日：1997-06-05
发明人： Iizuka, Kunihiko
IPC分类号： H03F1/30
摘要： In an analog signal processing device, an output signal and a reference level are compared by a comparator, and a result of comparison is filtered by a low-pass filter. By doing so, an adaptive control signal is generated so as to correspond to a background signal component having a low frequency, included in an input signal, and is negatively fed back to a signal processing unit. With this arrangement, the background signal component is compensated by the adaptive control signal having a frequency band sufficiently separate from a frequency band of a target signal component to be processed, the component being included in the input signal. As a result, a DC level of the output signal is stabilized at the reference level. Therefore, the signal processing device of a capacitive coupling type incorporating an amplifier, an input capacitor, and a feedback capacitor is allowed to carry out an adaptive control operation for keeping a DC level of the output signal to a desired level, with respect to changes in the background signal component or a shift of the input signal from an input reference level (average value), without suspending a signal processing operation. As a result, a spare circuit for a refreshing operation for compensating an off-set voltage of the amplifier can be omitted.
摘要翻译： 在模拟信号处理装置中，通过比较器比较输出信号和参考电平，并且通过低通滤波器对比较结果进行滤波。 通过这样做，产生自适应控制信号，以对应于包括在输入信号中的具有低频的背景信号分量，并将其反馈给信号处理单元。 利用这种布置，背景信号分量由具有与要处理的目标信号分量的频带充分分离的频带的自适应控制信号补偿，该分量包括在输入信号中。 结果，输出信号的直流电平稳定在参考电平。 因此，允许包括放大器，输入电容器和反馈电容器的电容耦合型的信号处理装置执行自适应控制操作，以将输出信号的DC电平保持在期望的水平 在背景信号分量中或输入信号从输入参考电平（平均值）的偏移，而不中断信号处理操作。 结果，可以省略用于补偿放大器的偏置电压的刷新操作的备用电路。
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公开(公告)号：EP0797303A2
公开(公告)日：1997-09-24
申请号：EP97104420.1
申请日：1997-03-14
发明人： Iizuka, Kunihiko
IPC分类号： H03K19/0185 , H03F3/347
CPC分类号： H03K19/00384
摘要： An inverter circuit is composed of a first inverter section used as an amplifier and a second inverter section, connected in series to the first inverter section, for controlling the gain of the first inverter section. Each of the first and second inverter sections includes a P type MOS field effect transistor and an N type MOS field effect transistor. The P type transistors are similar to each other, and so are the N type transistors. For example, the transistors in the second inverter section have a proportion (ratio of the channel width to the channel length) 1/A time that of the respective transistors in the first inverter section, where "A" is a positive constant. Input and output terminals of the second inverter section are short-circuited. In other words, the transistors of the second inverter section are connected at their gates and drains, thus replacing conventional resistors. If the positive constant A is set to be smaller than the DC gain of a typical inverter, the DC gain of the inverter arranged as above is not affected by irregularity in a manufacturing process and can be regarded equal to A. This prevents the parasitic capacity from increasing with an increase of the area. Therefore, it is possible to restrain deterioration of the frequency characteristics and power consumption.
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5.发明授权Method of compensating offset voltage caused in analog arithmetic unit and analog arithmetic unit 失效用于补偿造成的模拟计算单元和模拟运算器的偏移电压的方法
公开(公告)号：EP0789312B1
公开(公告)日：2002-09-25
申请号：EP97300828.7
申请日：1997-02-07
发明人： Iizuka, Kunihiko
IPC分类号： G06G7/12
CPC分类号： G06G7/12
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公开(公告)号：EP0751624A3
公开(公告)日：2001-04-11
申请号：EP96110323.1
申请日：1996-06-26
IPC分类号： H03M7/30
CPC分类号： G06T9/008 , H03M7/3082 , H04N19/94
摘要： An encoding apparatus uses a vector quantization encoding method for encoding indexes of codewords, which supply a scalar quantized code of a maximum scalar product value of each code word in a code book, and its maximum scalar product value to a vector component of an input image inputted from an image sensor, so as to output the encoded indexes. A scalar product value calculating circuit in the encoding apparatus has scalar product value calculating sections, which are composed of an analog circuit having a code component capacitor corresponding to each code component, a differential amplifier and a feedback capacitor, corresponding to each codeword, and the scalar product values of the input vectors are calculated in parallel by the scalar product value calculating sections. In such a manner, when the analog calculation is made, the scale of the circuit can be decreased and the power consumption can be lowered. Therefore, unlike the case where the calculation is made after A/D conversion, it is possible to avoid a problem that the number of times of calculations and the power consumption are remarkably increased due to increases in the number of dimensions of the input vector and the number of gradations.
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公开(公告)号：EP0751686A2
公开(公告)日：1997-01-02
申请号：EP96110324.9
申请日：1996-06-26
IPC分类号： H04N7/26
CPC分类号： H04N19/94 , G06T9/008 , H03M7/3082
摘要： An image compressing apparatus employs a mean-separated normalized vector quantization method according to which, with respect to vector components corresponding to input images inputted from image sensors via a plurality of lines, encodes and outputs a scalar-quantized code of a mean value, a scalar-quantized code of a maximum scalar product value with each code word in a code book, and an index of one of the code words which yields a maximum scalar product value. In this image compressing apparatus, when the maximum scalar product value is less than a predetermined threshold value, in accordance with judgement by a comparator circuit, an output selecting circuit stops outputting the codes of the maximum scalar product value and of the index, and outputs only the code of the mean value. Therefore, when the image is uniform with pixels varying little in their luminance levels in compression processing unit blocks, code data to be outputted are restricted so that only data of the mean value are outputted. Consequently, it is possible to restrain degradation of the image and to considerably reduce data amount.
摘要翻译： 图像压缩装置采用平均分离的归一化矢量量化方法，根据该量化方法，对于通过多行从图像传感器输入的输入图像的矢量分量，编码并输出平均值的标量化码， 具有代码本中的每个代码字的最大标量积值的标量化代码，以及产生最大标量乘积值的代码字之一的索引。 在该图像压缩装置中，当最大标量乘积值小于预定阈值时，根据比较器电路的判断，输出选择电路停止输出最大标量乘积值和索引的代码，并输出 只有代码的平均值。 因此，当在压缩处理单元块中图像的亮度级别变化很小的图像均匀时，要输出的代码数据被限制，从而仅输出平均值的数据。 因此，可以抑制图像的劣化并大大减少数据量。
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公开(公告)号：EP0746093A1
公开(公告)日：1996-12-04
申请号：EP96106654.5
申请日：1996-04-26
IPC分类号： H03F1/08
摘要： An operational amplifier including reverse amplifiers interconnected in series in an odd number of stages not less than three, an element for feeding back an output from the reverse amplifier in the last stage to an input of the reverse amplifier in a first stage, and a feedback capacitance element provided across the input and output ends of at least one of the reverse amplifiers. The Miller effect makes the feedback current from the capacitance element appear as if it were increased by a factor of the amplification factor of a concerned inverter. Thus, the capacity of the capacitance element preventing the oscillation of the inverters can be reduced. As a result, the operational amplifier becomes highly responsive, and therefore, becomes operable for a high frequency signal.
摘要翻译： 一种运算放大器，包括以奇数级不小于3的串联互连的反向放大器，用于将最后级中的反向放大器的输出反馈到第一级的反向放大器的输入的元件和反馈 电容元件设置在至少一个反向放大器的输入和输出端之间。 米勒效应使得来自电容元件的反馈电流看起来好像是因为相关逆变器的放大系数而增加。 因此，可以减少防止逆变器的振荡的电容元件的容量。 结果，运算放大器变得高度响应，并且因此变得可操作用于高频信号。
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公开(公告)号：EP1837989A1
公开(公告)日：2007-09-26
申请号：EP06024072.8
申请日：2006-11-20
CPC分类号： H03F3/72 , H01L27/0207 , H01L29/41758 , H01L29/4238 , H03F1/223 , H03F1/26 , H03F2200/294 , H03F2200/372 , H03F2203/7236 , H03G1/0029 , H03G1/0088
摘要： A variable gain amplifier is provided that can obtain a wide range of gain variation and suppress the deterioration of linearity when switching between amplifying transistors. ' The variable gain amplifier includes a plurality of cascode amplifiers each including an amplifying transistor and a plurality of cascode transistors connected in a cascode arrangement to an output terminal of the amplifying transistor. The plurality of cascode amplifiers are connected through attenuators. The variable gain amplifier further includes a first controller that controls ON/OFF operations of the plurality of cascode transistors included in each cascode amplifier; and a second controller that controls ON/OFF operations of a plurality of amplifying transistors, only one of which is included in each of the plurality of cascode amplifiers, such that only selected one of the plurality of amplifying transistors is turned on.
摘要翻译： 提供了一种可变增益放大器，其可以获得宽范围的增益变化，并且在放大晶体管之间切换时抑制线性的劣化。 “可变增益放大器包括多个共源共栅放大器，每个包括放大晶体管和以共源共栅组装置连接到放大晶体管的输出端的多个共源共栅晶体管。 多个共源共栅放大器通过衰减器连接。 可变增益放大器还包括：第一控制器，其控制包括在每个共射共基放大器中的多个共源共栅晶体管的接通/断开操作; 以及第二控制器，其控制多个放大晶体管的ON / OFF操作，其中仅一个放大晶体管中的一个被包括在所述多个共源共栅放大器的每一个中，使得仅所述多个放大晶体管中的所选择的一个放大晶体管导通。
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公开(公告)号：EP0982860A3
公开(公告)日：2001-09-19
申请号：EP99115610.0
申请日：1999-08-06
发明人： Kawama, Shuichi , Iizuka, Kunihiko
IPC分类号： H03H17/02
CPC分类号： H03H17/0254
摘要： A matched filter for inversely spreading a received signal using spreading signals in a spread spectrum communications receiver includes: a plurality of correlators for determining cross-correlation functions of a received signal which has been sampled at a certain timing and spreading signals having a certain section length; a delay circuit for successively transferring the spreading signals having a certain section length with respect to the plurality of correlating means by delaying timings of the transfer by a period equal to the section length of the spreading signals; and a multiplexer for successively selecting one of the cross-correlation functions outputted from the plurality of correlating means, by a period equal to a sampling interval of the received signal. As a result, a matched filter with a small circuit size and low power consumption is realized.
摘要翻译： 一种用于在扩展频谱通信接收机中使用扩展信号对接收信号进行逆扩展的匹配滤波器包括：多个相关器，用于确定已经在某个定时采样的接收信号的互相关函数，以及具有一定截面长度的扩展信号 ; 延迟电路，用于通过将所述传送的定时延迟等于所述扩展信号的段长度的周期，连续传送具有相对于所述多个相关装置的一定段长度的扩展信号; 以及多路复用器，用于连续地选择从多个相关装置输出的互相关函数之一等于接收信号的采样间隔的周期。 结果，实现了具有小电路尺寸和低功耗的匹配滤波器。
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