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1. 发明授权

US08054210B2 Analog to digital converter 有权
标题翻译：模数转换器
公开(公告)号：US08054210B2
公开(公告)日：2011-11-08
申请号：US12015898
申请日：2008-01-17
申请人： Matthew Purcell , Rachel Elliott , Graeme Storm
发明人： Matthew Purcell , Rachel Elliott , Graeme Storm
IPC分类号： H03M1/56
CPC分类号： H03M1/08 , H03M1/12 , H03M1/34 , H04N5/3575 , H04N5/378
摘要： An image sensor includes a pixel array, and a correlated double sample circuit coupled to one of the pixels in the pixel array. The correlated double sample circuit includes first and second inputs, and first and second sample capacitors respectively coupled to the first and second inputs. The first input is for receiving an analog signal from a pixel, and the second input is for receiving a time varying reference signal. The analog signal varies during a pixel readout period, and has a first level during a first reset period and a second-level during a second read period. A comparator circuit compares the time varying reference signal and the analog signal. The analog signal and the time varying reference signal are constantly read onto one of the first and second sample capacitors during both the first reset period and the second read period.
摘要翻译：图像传感器包括像素阵列和耦合到像素阵列中的像素之一的相关双倍采样电路。相关双采样电路包括第一和第二输入以及分别耦合到第一和第二输入的第一和第二采样电容器。第一输入用于从像素接收模拟信号，第二输入用于接收时变参考信号。模拟信号在像素读出周期期间变化，并且在第一复位周期期间具有第一电平，在第二读取周期期间具有第二电平。比较器电路将时变参考信号与模拟信号进行比较。在第一复位周期和第二读取周期期间，模拟信号和时变参考信号一直被读取到第一和第二采样电容器中的一个上。

2. 发明申请

US20120006973A1 IMAGE SENSOR WITH SAMPLE AND HOLD CIRCUITRY FOR ADDRESSING TIME VARIANT NOISE 有权
标题翻译：具有采样和保持电路的图像传感器，用于处理时变噪声
公开(公告)号：US20120006973A1
公开(公告)日：2012-01-12
申请号：US13173137
申请日：2011-06-30
申请人： Graeme Storm , Matthew Purcell
发明人： Graeme Storm , Matthew Purcell
IPC分类号： H01L27/146
CPC分类号： H04N5/363 , H04N5/3575 , H04N5/3658 , H04N5/378
摘要： An image sensor includes an array of pixels. Each pixel has at least one photo-sensitive element. Readout circuitry receives an analog signal from each pixel at a first time and at a second time, between which the analog signal changes. The image sensor further includes associated support circuitry which is a source of time variant noise. The signal level at both first and second times includes pixel noise. Sample and hold circuitry is provided to maintain substantially level at least a proportion of this support circuitry noise time invariant at the sensor output between the first time and the second time.
摘要翻译：图像传感器包括像素阵列。每个像素具有至少一个光敏元件。读出电路在第一时间和第二时间从每个像素接收模拟信号，模拟信号之间变化。图像传感器还包括作为时变噪声源的相关联的支持电路。第一次和第二次的信号电平包括像素噪声。提供采样和保持电路以在第一时间和第二时间之间基本上保持该传感器输出处的该支持电路噪声时间不变量的至少一部分。

3. 发明申请

US20090237536A1 ANALOG-TO-DIGITAL CONVERSION IN IMAGE SENSORS 有权
标题翻译：图像传感器中的模拟数字转换
公开(公告)号：US20090237536A1
公开(公告)日：2009-09-24
申请号：US12402397
申请日：2009-03-11
申请人： Matthew Purcell , Graeme Storm , Min Qu
发明人： Matthew Purcell , Graeme Storm , Min Qu
IPC分类号： H04N5/335 , H03M1/12
CPC分类号： H04N5/3355 , H04N5/3575 , H04N5/3577 , H04N5/378
摘要： An image sensor has a per-column ADC arrangement including first and second capacitors for correlated double sampling, and a comparator circuit. The capacitors are continuously connected to, respectively, the analog pixel signal and a ramp signal without use of a hold operation. The comparator circuit comprises a differential amplifier having one input connected to the junction of the two capacitors and another input connected to a reference signal. The reference signal is preferably sampled and held from a reference voltage. The use of a differential amplifier as first stage of the comparator addresses problems arising from ground voltage bounce when a large pixel array images a scene with low contrast.
摘要翻译：图像传感器具有包括用于相关双采样的第一和第二电容器以及比较器电路的每列ADC装置。电容器分别连续地连接到模拟像素信号和斜坡信号，而不使用保持操作。比较器电路包括差分放大器，其具有连接到两个电容器的结的一个输入端和连接到参考信号的另一个输入端。参考信号优选地从参考电压采样和保持。使用差分放大器作为比较器的第一级，可以解决当大像素阵列以低对比度成像场景时，由接地电压反弹引起的问题。

4. 发明申请

US20060066750A1 Image sensors 审中-公开
标题翻译：图像传感器
公开(公告)号：US20060066750A1
公开(公告)日：2006-03-30
申请号：US11235465
申请日：2005-09-26
申请人： Robert Henderson , Matthew Purcell , Graeme Storm
发明人： Robert Henderson , Matthew Purcell , Graeme Storm
IPC分类号： H04N5/235
CPC分类号： H04N5/35581 , H04N5/23245 , H04N5/343 , H04N5/3452 , H04N5/3532
摘要： A rolling blade exposure system includes odd rows of a pixel array being read out with a short exposure time and even rows being read out at a long exposure time. Each pair of sampled rows are stitched together before to form a single output line. The resultant image is then formed from the output lines. The stitching process ensures that the resultant image has a wide dynamic range. This is achieved at the expense of a loss of resolution, but this loss is acceptable for certain applications.
摘要翻译：滚动刀片曝光系统包括以短曝光时间读出的奇数行像素阵列，并且偶数行在长曝光时间被读出。每对采样的行在之前缝合在一起以形成单个输出线。然后从输出线形成所得到的图像。缝合过程确保所得到的图像具有宽的动态范围。这是以牺牲解决方案为代价的，但这种损失是可以接受的某些应用程序。

5. 发明授权

US08772695B2 Image sensor arrangement 有权
标题翻译：图像传感器布置
公开(公告)号：US08772695B2
公开(公告)日：2014-07-08
申请号：US13324009
申请日：2011-12-13
申请人： Graeme Storm , Matthew Purcell , Derek Tolmie , John Kevin Moore , Michael Wigley
发明人： Graeme Storm , Matthew Purcell , Derek Tolmie , John Kevin Moore , Michael Wigley
IPC分类号： H01L21/00 , H04N3/14
CPC分类号： H04N5/378 , H04N5/347 , H04N5/363
摘要： Each column of pixels in an image sensor array has at least two column bitlines connected to an output of each pixel. A readout input circuit includes first inputs and a second input. Each first input is connected, via a capacitance, to a comparator input node. The second input is connected via a capacitance to the same comparator input node. The first inputs receive, in parallel, an analog signal acquired from the pixels via the column bitlines. The analog signals vary during a pixel readout period and have a first level during a first calibration period and a second level during a second read period with the analog signals being constantly read onto the capacitances during both the first calibration period and the second read period. The comparator compares an average of the signals on the plurality of first inputs to the reference signal.
摘要翻译：图像传感器阵列中的每列像素具有连接到每个像素的输出的至少两列列位线。读出输入电路包括第一输入和第二输入。每个第一输入通过电容连接到比较器输入节点。第二个输入通过电容连接到同一个比较器输入节点。第一输入并行地接收通过列位线从像素获取的模拟信号。模拟信号在像素读出周期期间变化，并且在第一校准周期期间具有第一电平，并且在第二读取周期期间具有第二电平，同时在第一校准周期和第二读取周期期间模拟信号恒定地读取到电容上。比较器将多个第一输入端的信号的平均值与参考信号进行比较。

6. 发明授权

US08305474B2 Analog-to-digital conversion in image sensors 有权
标题翻译：图像传感器中的模数转换
公开(公告)号：US08305474B2
公开(公告)日：2012-11-06
申请号：US12622373
申请日：2009-11-19
申请人： Matthew Purcell , Graeme Storm , Derek Tolmie , Mhamed El Hachimi , Laurent Simony , Min Qu
发明人： Matthew Purcell , Graeme Storm , Derek Tolmie , Mhamed El Hachimi , Laurent Simony , Min Qu
IPC分类号： H04N3/14 , H04N5/335
CPC分类号： H04N5/3355 , H04N5/3577
摘要： An image sensor has a per-column ADC arrangement including first and second capacitors allowing a comparator circuit to perform correlated double sampling. The capacitors are continuously connected to, respectively, the analog pixel signal and a ramp signal without use of a hold operation. The comparator circuit comprises a differential input being connected to the junction of the two capacitors and being biased by a reference signal. The reference signal is preferably sampled and held from a reference voltage. The use of a differential input as first stage of the comparator addresses problems arising from ground voltage bounce when a large pixel array images a scene with low contrast. Connectivity of the differential input stage allows the ramp signal to see a constant capacitive load thus reduce image artifacts referred to as smear.
摘要翻译：图像传感器具有包括允许比较器电路执行相关双重采样的第一和第二电容器的每列ADC布置。电容器分别连续地连接到模拟像素信号和斜坡信号，而不使用保持操作。比较器电路包括差分输入端，连接到两个电容器的结，并被参考信号偏置。参考信号优选地从参考电压采样和保持。使用差分输入作为比较器的第一级，当大像素阵列以低对比度的场景成像时，可以解决地电压反弹引起的问题。差分输入级的连接允许斜坡信号看到恒定的电容性负载，从而减少称为污迹的图像伪影。

7. 发明申请

US20100157035A1 ANALOG-TO-DIGITAL CONVERSION IN IMAGE SENSORS 有权
标题翻译：图像传感器中的模拟数字转换
公开(公告)号：US20100157035A1
公开(公告)日：2010-06-24
申请号：US12622373
申请日：2009-11-19
申请人： Matthew Purcell , Graeme Storm , Derek Tolmie , Mhamed El Hachim , Laurent Simony , Min Qu
发明人： Matthew Purcell , Graeme Storm , Derek Tolmie , Mhamed El Hachim , Laurent Simony , Min Qu
IPC分类号： H04N7/18 , H04N5/335 , G06G7/18
CPC分类号： H04N5/3355 , H04N5/3577
摘要： An image sensor has a per-column ADC arrangement including first and second capacitors allowing a comparator circuit to perform correlated double sampling. The capacitors are continuously connected to, respectively, the analog pixel signal and a ramp signal without use of a hold operation. The comparator circuit comprises a differential input being connected to the junction of the two capacitors and being biased by a reference signal. The reference signal is preferably sampled and held from a reference voltage. The use of a differential input as first stage of the comparator addresses problems arising from ground voltage bounce when a large pixel array images a scene with low contrast. Connectivity of the differential input stage allows the ramp signal to see a constant capacitive load thus reduce image artifacts referred to as smear.
摘要翻译：图像传感器具有包括允许比较器电路执行相关双重采样的第一和第二电容器的每列ADC布置。电容器分别连续地连接到模拟像素信号和斜坡信号，而不使用保持操作。比较器电路包括差分输入端，连接到两个电容器的结，并被参考信号偏置。参考信号优选地从参考电压采样和保持。使用差分输入作为比较器的第一级，当大像素阵列以低对比度的场景成像时，可以解决地电压反弹引起的问题。差分输入级的连接允许斜坡信号看到恒定的电容性负载，从而减少称为污迹的图像伪影。

8. 发明授权

US08841595B2 Image sensor with sample and hold circuitry for addressing time variant noise 有权
标题翻译：具有采样和保持电路的图像传感器，用于解决时变噪声
公开(公告)号：US08841595B2
公开(公告)日：2014-09-23
申请号：US13173137
申请日：2011-06-30
申请人： Graeme Storm , Matthew Purcell
发明人： Graeme Storm , Matthew Purcell
IPC分类号： H01L27/00 , H04N5/378 , H04N5/363 , H04N5/365 , H04N5/357
CPC分类号： H04N5/363 , H04N5/3575 , H04N5/3658 , H04N5/378
摘要： An image sensor includes an array of pixels. Each pixel has at least one photo-sensitive element. Readout circuitry receives an analog signal from each pixel at a first time and at a second time, between which the analog signal changes. The image sensor further includes associated support circuitry which is a source of time variant noise. The signal level at both first and second times includes pixel noise. Sample and hold circuitry is provided to maintain substantially level at least a proportion of this support circuitry noise time invariant at the sensor output between the first time and the second time.
摘要翻译：图像传感器包括像素阵列。每个像素具有至少一个光敏元件。读出电路在第一时间和第二时间从每个像素接收模拟信号，模拟信号之间变化。图像传感器还包括作为时变噪声源的相关联的支持电路。第一次和第二次的信号电平包括像素噪声。提供采样和保持电路以在第一时间和第二时间之间基本上保持该传感器输出处的该支持电路噪声时间不变量的至少一部分。

9. 发明授权

US08134623B2 Analog-to-digital conversion in image sensors using a differential comparison 有权
标题翻译：使用差分比较的图像传感器中的模数转换
公开(公告)号：US08134623B2
公开(公告)日：2012-03-13
申请号：US12402397
申请日：2009-03-11
申请人： Matthew Purcell , Graeme Storm , Min Qu
发明人： Matthew Purcell , Graeme Storm , Min Qu
IPC分类号： H04N3/14 , H04N5/335
CPC分类号： H04N5/3355 , H04N5/3575 , H04N5/3577 , H04N5/378
摘要： An image sensor has a per-column ADC arrangement including first and second capacitors for correlated double sampling, and a comparator circuit. The capacitors are continuously connected to, respectively, the analog pixel signal and a ramp signal without use of a hold operation. The comparator circuit comprises a differential amplifier having one input connected to the junction of the two capacitors and another input connected to a reference signal. The reference signal is preferably sampled and held from a reference voltage. The use of a differential amplifier as first stage of the comparator addresses problems arising from ground voltage bounce when a large pixel array images a scene with low contrast.
摘要翻译：图像传感器具有包括用于相关双采样的第一和第二电容器以及比较器电路的每列ADC装置。电容器分别连续地连接到模拟像素信号和斜坡信号，而不使用保持操作。比较器电路包括差分放大器，其具有连接到两个电容器的结的一个输入端和连接到参考信号的另一个输入端。参考信号优选地从参考电压采样和保持。使用差分放大器作为比较器的第一级，可以解决当大像素阵列以低对比度成像场景时，由接地电压反弹引起的问题。

10. 发明申请

US20080192126A1 ANALOG TO DIGITAL CONVERTER 有权
标题翻译：模拟到数字转换器
公开(公告)号：US20080192126A1
公开(公告)日：2008-08-14
申请号：US12015898
申请日：2008-01-17
申请人： Matthew Purcell , Rachel Elliott , Graeme Storm
发明人： Matthew Purcell , Rachel Elliott , Graeme Storm
IPC分类号： H04N5/228 , H04N5/335 , H03M1/12
CPC分类号： H03M1/08 , H03M1/12 , H03M1/34 , H04N5/3575 , H04N5/378
摘要： An image sensor includes a pixel array, and a correlated double sample circuit coupled to one of the pixels in the pixel array. The correlated double sample circuit includes first and second inputs, and first and second sample capacitors respectively coupled to the first and second inputs. The first input is for receiving an analog signal from a pixel, and the second input is for receiving a time varying reference signal. The analog signal varies during a pixel readout period, and has a first level during a first reset period and a second-level during a second read period. A comparator circuit compares the time varying reference signal and the analog signal. The analog signal and the time varying reference signal are constantly read onto one of the first and second sample capacitors during both the first reset period and the second read period.
摘要翻译：图像传感器包括像素阵列和耦合到像素阵列中的像素之一的相关双倍采样电路。相关双采样电路包括第一和第二输入以及分别耦合到第一和第二输入的第一和第二采样电容器。第一输入用于从像素接收模拟信号，第二输入用于接收时变参考信号。模拟信号在像素读出周期期间变化，并且在第一复位周期期间具有第一电平，在第二读取周期期间具有第二电平。比较器电路将时变参考信号与模拟信号进行比较。在第一复位周期和第二读取周期期间，模拟信号和时变参考信号一直被读取到第一和第二采样电容器中的一个上。

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