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    • 3. 发明申请
    • CAPACITIVE SENSING SYSTEM AND METHOD
    • 电容式感应系统及方法
    • US20160156366A1
    • 2016-06-02
    • US14897854
    • 2014-06-11
    • IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.
    • Laurent LAMESCH
    • H03M1/20H03M1/12H03C3/02
    • H03M1/20H03C3/02H03M1/124H03M1/201
    • A capacitive sensing system operates according to a method which uses an ADC with a low resolution r, to produce a digital signal with a higher resolution R. The analog signal to be digitized is modulated with a triangular or saw-tooth modulating signal, so that a modulated analog signal is obtained, which is sampled with the ADC. Thereby, digital samples are produced. An average is taken over N (>1) successive digital samples. The triangular or saw-tooth signal is chosen to have a peak-to-peak amplitude corresponding at least approximately to an integer multiple L, with L≧1, of the quantization step size of the ADC. The saw-tooth or triangular signal, furthermore, has a number M, of periods per each sequence of N samples. M and N are chosen such that M>1 and M≠N and such that R=r*N/(k*gcd(N, M)*L), where gcd(M, N) is the greatest common divisor of N and M and where k=2 if the modulating signal is a saw-tooth signal and k=4 if the modulating signal is a triangular signal.
    • 电容式感测系统根据使用具有低分辨率r的ADC的方法进行工作,以产生具有更高分辨率R的数字信号。要被数字化的模拟信号用三角形或锯齿调制信号调制,使得 得到一个调制的模拟信号,用ADC进行采样。 从而产生数字样本。 N(> 1)个连续数字样本的平均数。 三角形或锯齿状信号被选择为具有至少近似于ADC的量化步长的L≥1的整数倍L的峰峰值幅度。 此外,锯齿或三角形信号具有每个N个样本的每个序列的周期数M。 M和N被选择为使得M> 1且M≠N,并且使得R = r * N /(k * gcd(N,M)* L),其中gcd(M,N)是N的最大公约数 如果调制信号是锯齿信号,则k = 2,如果调制信号是三角形信号,则k = 4。
    • 4. 发明申请
    • METHOD AND DEVICE FOR ANALOG/DIGITAL CONVERSION OF AN ANALOG SIGNAL
    • 用于模拟信号的模拟/数字转换的方法和装置
    • US20160134297A1
    • 2016-05-12
    • US14835980
    • 2015-08-26
    • STMICROELECTRONICS (GRENOBLE 2) SAS
    • Laurent SIMONY
    • H03M1/20H01L27/146H03M1/36H03M1/00H03M1/06
    • H03M1/20H01L27/14643H03M1/002H03M1/0604H03M1/188H03M1/36H03M1/56
    • A method includes a first analog/digital conversion of an analog signal over m bits, with m less than n, associated with a first full-scale value, and a second analog/digital conversion of the analog signal over m bits associated with a second full-scale value 2n-m times bigger than the first. The two analog/digital conversions are carried out simultaneously and respectively delivering a first intermediate digital word of m bits and a second intermediate digital word of m bits. The method also includes a digital post-processing carried out after the two analog/digital conversions and generating an n-bit digital word starting from at least one of the two intermediate digital words extended to n bits and from at least one threshold digital indication representative of at least one threshold lower than or equal to the first full-scale value.
    • 一种方法包括通过m比特的模拟信号的第一模拟/数字转换,具有与第一满量程值相关联的m小于n的模拟信号,以及在与第二满量程相关联的m位上的模拟信号的第二模拟/数字转换 全尺寸值比第一大2n-m倍。 两个模拟/数字转换同时执行,分别传送m位的第一中间数字字和m位的第二中间数字字。 该方法还包括在两个模拟/数字转换之后执行的数字后处理,并产生从扩展到n位的两个中间数字字中的至少一个开始的n位数字字,以及从至少一个阈值数字指示代表 的至少一个阈值小于或等于第一满量程值。
    • 7. 发明申请
    • A/D CONVERTER, SOLID-STATE IMAGE SENSOR AND IMAGING SYSTEM
    • A / D转换器,固态图像传感器和成像系统
    • US20150129744A1
    • 2015-05-14
    • US14520426
    • 2014-10-22
    • Canon Kabushiki Kaisha
    • Kazuhiro SonodaShintaro Takenaka
    • H03M1/34H03K3/037H03K3/64
    • H03K3/64H03M1/20H03M1/56
    • An A/D converter includes a comparator configured to compare an input voltage and a reference signal changing monotonically with respect to time and output a comparison result signal indicating a comparison result, a pulse signal generation circuit configured to generate a pulse signal in accordance with the comparison result signal, a counting unit configured to receive a first clock signal, and to count the first clock signal from a start of changing a level of the reference signal to when a level of the comparison result signal is changed, and a latch unit configured to latch the pulse signal at a timing which is defined by a plurality of clock signals including a second clock signal in phase with the first clock signal and a third clock signal having a different phase from that of the second clock signal.
    • A / D转换器包括:比较器,被配置为比较输入电压和参考信号相对于时间单调变化,并输出表示比较结果的比较结果信号;脉冲信号产生电路,被配置为根据 比较结果信号,被配置为接收第一时钟信号的计数单元,并且从开始将参考信号的电平改变到比较结果信号的电平改变时对第一时钟信号进行计数;以及闩锁单元配置 以由包括与第一时钟信号同相的第二时钟信号的多个时钟信号定义的定时和与第二时钟信号具有不同相位的第三时钟信号的定时锁存脉冲信号。