AD转换器、信号处理方法、固态成像装置和电子设备

    公开(公告)号:CN104243865B

    公开(公告)日:2018-08-14

    申请号:CN201410240781.1

    申请日:2014-05-30

    Applicant: 索尼公司

    Inventor: 金川恭一

    Abstract: 本发明涉及AD转换器、信号处理方法、固态成像装置和电子设备。AD转换器包括:第一AD转换单元,其中,像素阵列的像素列被分成至少两组,并且第一AD转换单元将斜坡信号与从第一组像素列输出的第一第一像素信号相比较并对第一像素信号执行AD转换;以及第二AD转换单元,将第二斜坡信号与从第二组像素列输出的第二像素信号相比较并对第二像素信号执行AD转换,其中,第一斜坡信号是在用于检测像素信号的信号电平的D相周期中其电平随着时间以恒定斜率降低的信号,并且第二斜坡信号是在D相周期中其电平随着时间以恒定斜率升高的信号。

    AD转换器、信号处理方法、固态成像装置和电子设备

    公开(公告)号:CN104243865A

    公开(公告)日:2014-12-24

    申请号:CN201410240781.1

    申请日:2014-05-30

    Applicant: 索尼公司

    Inventor: 金川恭一

    Abstract: 本发明涉及AD转换器、信号处理方法、固态成像装置和电子设备。AD转换器包括:第一AD转换单元,其中,像素阵列的像素列被分成至少两组,并且第一AD转换单元将斜坡信号与从第一组像素列输出的第一第一像素信号相比较并对第一像素信号执行AD转换;以及第二AD转换单元,将第二斜坡信号与从第二组像素列输出的第二像素信号相比较并对第二像素信号执行AD转换,其中,第一斜坡信号是在用于检测像素信号的信号电平的D相周期中其电平随着时间以恒定斜率降低的信号,并且第二斜坡信号是在D相周期中其电平随着时间以恒定斜率升高的信号。

    Calibration for a single ramp multi slope analog-to-digital converter
    5.
    发明授权
    Calibration for a single ramp multi slope analog-to-digital converter 有权
    单斜坡多斜率模数转换器的校准

    公开(公告)号:US09337856B1

    公开(公告)日:2016-05-10

    申请号:US14867201

    申请日:2015-09-28

    Abstract: Methods and Systems for calibrating a Single Ramp Multiple Slope Analog to Digital Converter (SRMS ADC), the ADC including a counter and a plurality N of charge and discharge elements of different time constant i.e. slope, wherein the relationships between slopes is defined as a function of the shallowest slope SN such that S1=K1·SN, S2=K2·SN, . . . SN-1=KN-1·SN-1 where the K values are integers, and the code count for conversion is C=K1·C1+K2·C2+ . . . KN-1·CN-1+CN where each Ci represents an observed counts per each slope for a conversion, including; sampling for a first calibration pass a voltage with the ADC, discharging the voltage on the steepest slope for a number of counter counts C11, charging and discharging on the remaining slopes up to K2 to KN-1 for a number of counts per slope, Ci1 e.g. C21 to CN-1,1, discharging the remaining voltage residue on the shallowest slope and note the count, CN,1, sampling the same voltage on the ADC for a second calibration pass, discharging the voltage on the steepest slope for a modified number of counter counts C12=C11+/−X, modifying the number of charge/discharge counts time Ci2 for the slopes K2 to KN-1 to adjust for the change expected from the modified steep slope discharge to reach the shallowest slope with the same expected residue as for the first calibration pass, discharging the remaining voltage residue on the shallowest slope and note the actual count, CN,2, adjusting K1 to K1a based on the difference between CN,1 and CN,2, and; using C=K1a·C1+K2·C2+ . . . KN-1·CN-1+CN as the count code for conversion.

    Abstract translation: 用于校准单斜坡多斜率模数转换器(SRMS ADC)的方法和系统,ADC包括不同时间常数即斜率的计数器和多个N个充电和放电元件,其中斜率之间的关系被定义为函数 的最小斜率SN,使得S1 = K1·SN,S2 = K2·SN。 。 。 SN-1 = KN-1·SN-1,其中K值是整数,转换代码计数为C = K1·C1 + K2·C2 +。 。 。 KN-1·CN-1 + CN,其中每个Ci表示转化每个斜率的观测计数,包括: 用于第一次校准的采样通过ADC传递电压,将最大斜率上的电压放电多个计数器计数C11,在其余斜率上的充电和放电达到K2至KN-1,对每个斜率计数Ci1 例如 C21至CN-1,1,放电最浅斜率上的剩余电压,并注意计数CN,1,对ADC进行相同的电压采样,进行第二次校准通过,将最陡坡上的电压放电至修改后的数字 计数器计数C12 = C11 +/- X,修改斜率K2至KN-1的充电/放电计数时间Ci2的数量,以调整从修改的陡倾斜放电预期的变化,以达到具有相同预期残留的最浅斜率 对于第一次校准通过,将最小斜坡上的剩余电压残余放电,并根据CN,1和CN,2之间的差值,注意实际计数CN,2调整K1至K1a; 使用C = K1a·C1 + K2·C2 +。 。 。 KN-1·CN-1 + CN作为转换计数码。

    AD CONVERTER, SIGNAL PROCESSING METHOD, SOLID-STATE IMAGING DEVICE, AND ELECTRONIC APPARATUS
    6.
    发明申请
    AD CONVERTER, SIGNAL PROCESSING METHOD, SOLID-STATE IMAGING DEVICE, AND ELECTRONIC APPARATUS 审中-公开
    AD转换器,信号处理方法,固态成像装置和电子装置

    公开(公告)号:US20150326803A1

    公开(公告)日:2015-11-12

    申请号:US14798111

    申请日:2015-07-13

    Inventor: Kyoichi Kanagawa

    Abstract: Provided is an AD converter including a first AD converting unit in which pixel columns of a pixel array are divided into at least two groups, and that compares a first ramp signal and a first pixel signal output from a first group of the pixel columns and performs AD conversion on the first pixel signal; and a second AD converting unit that compares a second ramp signal and a second pixel signal output from a second group of the pixel columns and performs AD conversion on the second pixel signal, in which the first ramp signal is a signal of which a level is decreased with a constant slope over time in a D-phase period for detecting a signal level of a pixel signal, and the second ramp signal is a signal of which a level is increased with a constant slope over time in the D-phase period.

    Abstract translation: 提供了一种AD转换器,其包括第一AD转换单元,其中像素阵列的像素列被划分为至少两组,并且比较第一斜坡信号和从第一组像素列输出的第一像素信号,并执行 第一像素信号的AD转换; 以及第二AD转换单元,其比较从第二组像素列输出的第二斜坡信号和第二像素信号,并且对第二像素信号执行AD转换,其中第一斜坡信号是水平的信号 在用于检测像素信号的信号电平的D相周期中以随时间的恒定斜率减小,并且第二斜坡信号是在D相周期中以随时间的恒定斜率增加电平的信号。

    Ad converter, signal processing method, solid-state imaging device, and electronic apparatus
    9.
    发明授权
    Ad converter, signal processing method, solid-state imaging device, and electronic apparatus 有权
    Ad转换器,信号处理方法,固态成像装置和电子装置

    公开(公告)号:US09106852B2

    公开(公告)日:2015-08-11

    申请号:US14268496

    申请日:2014-05-02

    Inventor: Kyoichi Kanagawa

    Abstract: Provided is an AD converter including a first AD converting unit in which pixel columns of a pixel array are divided into at least two groups, and that compares a first ramp signal and a first pixel signal output from a first group of the pixel columns and performs AD conversion on the first pixel signal; and a second AD converting unit that compares a second ramp signal and a second pixel signal output from a second group of the pixel columns and performs AD conversion on the second pixel signal, in which the first ramp signal is a signal of which a level is decreased with a constant slope over time in a D-phase period for detecting a signal level of a pixel signal, and the second ramp signal is a signal of which a level is increased with a constant slope over time in the D-phase period.

    Abstract translation: 提供了一种AD转换器,其包括第一AD转换单元,其中像素阵列的像素列被划分为至少两组,并且比较第一斜坡信号和从第一组像素列输出的第一像素信号,并执行 第一像素信号的AD转换; 以及第二AD转换单元,其比较从第二组像素列输出的第二斜坡信号和第二像素信号,并且对第二像素信号执行AD转换,其中第一斜坡信号是水平的信号 在用于检测像素信号的信号电平的D相周期中以随时间的恒定斜率减小,并且第二斜坡信号是在D相周期中以随时间的恒定斜率增加电平的信号。

Patent Agency Ranking