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公开(公告)号：US20050189470A1
公开(公告)日：2005-09-01
申请号：US11040074
申请日：2005-01-21
Applicant: Matthew Purcell , Arnaud Laflaquiere
Inventor： Matthew Purcell , Arnaud Laflaquiere
IPC: H01L27/00 , H01L27/148 , H04N5/335
CPC classification number: H04N5/374 , H04N5/3577 , H04N5/3698
Abstract: An image sensor includes a power supply ripple rejection circuit having an input connected to a supply voltage reference, and an output connected to an output voltage reference. The power supply ripple rejection circuit reduces the affect of variance in the supply voltage reference on the output voltage reference.
Abstract translation: 图像传感器包括具有连接到电源电压基准的输入的电源纹波抑制电路和连接到输出电压基准的输出。 电源纹波抑制电路可以减小输出电压基准上电源参考电压变化的影响。
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公开(公告)号：US08772695B2
公开(公告)日：2014-07-08
申请号：US13324009
申请日：2011-12-13
Applicant: Graeme Storm , Matthew Purcell , Derek Tolmie , John Kevin Moore , Michael Wigley
Inventor： Graeme Storm , Matthew Purcell , Derek Tolmie , John Kevin Moore , Michael Wigley
Abstract: 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.
Abstract translation: 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。
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公开(公告)号：US20120312963A1
公开(公告)日：2012-12-13
申请号：US13324009
申请日：2011-12-13
Applicant: Graeme STORM , Matthew PURCELL , Derek TOLMIE , John Kevin MOORE , Michael WIGLEY
Inventor： Graeme STORM , Matthew PURCELL , Derek TOLMIE , John Kevin MOORE , Michael WIGLEY
IPC: H01L27/146
Abstract: 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.
Abstract translation: 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。
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公开(公告)号：US08305474B2
公开(公告)日：2012-11-06
申请号：US12622373
申请日：2009-11-19
Applicant: Matthew Purcell , Graeme Storm , Derek Tolmie , Mhamed El Hachimi , Laurent Simony , Min Qu
Inventor： Matthew Purcell , Graeme Storm , Derek Tolmie , Mhamed El Hachimi , Laurent Simony , Min Qu
CPC classification number: H04N5/3355 , H04N5/3577
Abstract: 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.
Abstract translation: 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。
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公开(公告)号：US20100157035A1
公开(公告)日：2010-06-24
申请号：US12622373
申请日：2009-11-19
Applicant: Matthew Purcell , Graeme Storm , Derek Tolmie , Mhamed El Hachim , Laurent Simony , Min Qu
Inventor： Matthew Purcell , Graeme Storm , Derek Tolmie , Mhamed El Hachim , Laurent Simony , Min Qu
CPC classification number: H04N5/3355 , H04N5/3577
Abstract: 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.
Abstract translation: 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。
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Patent Agency Ranking
16.发明授权Image sensor power supply including at least one ripple rejection circuit for reducing variations in the supply voltage 有权图像传感器电源包括至少一个纹波抑制电路，用于减小电源电压的变化公开(公告)号：US07659498B2
公开(公告)日：2010-02-09
申请号：US11040074
申请日：2005-01-21
Applicant: Matthew Purcell , Arnauld Laflaquiere
Inventor： Matthew Purcell , Arnauld Laflaquiere
IPC: H01L27/00
CPC classification number: H04N5/374 , H04N5/3577 , H04N5/3698
Abstract: An image sensor includes a power supply ripple rejection circuit having an input connected to a supply voltage reference, and an output connected to an output voltage reference. The power supply ripple rejection circuit reduces the affect of variance in the supply voltage reference on the output voltage reference.
Abstract translation: 图像传感器包括具有连接到电源电压基准的输入的电源纹波抑制电路和连接到输出电压基准的输出。 电源纹波抑制电路可以减小输出电压基准上电源参考电压变化的影响。
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公开(公告)号：US20050253043A1
公开(公告)日：2005-11-17
申请号：US11104749
申请日：2005-04-13
Applicant: Matthew Purcell , Robert Henderson
Inventor： Matthew Purcell , Robert Henderson
CPC classification number: H04N5/335
Abstract: An image sensor includes an array of pixels arranged in rows and columns. A reference current source provides the reference current to a transistor forming one half of a current mirror. Each column has a current source, which forms the other half of a current mirror. A switch is provided to selectively connect a resistance between ground and the transistor. When the resistance is connected, the transistor is starved of gate-source voltage, which reduces the current supplied by each current source.
Abstract translation: 图像传感器包括排列成行和列的像素阵列。 参考电流源为形成电流镜的一半的晶体管提供参考电流。 每列都有一个电流源，它形成当前镜像的另一半。 提供开关以选择性地连接接地和晶体管之间的电阻。 当电阻连接时，晶体管缺乏栅极 - 源极电压，这降低了每个电流源提供的电流。
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公开(公告)号：US20090237536A1
公开(公告)日：2009-09-24
申请号：US12402397
申请日：2009-03-11
Applicant: Matthew Purcell , Graeme Storm , Min Qu
Inventor： Matthew Purcell , Graeme Storm , Min Qu
CPC classification number: H04N5/3355 , H04N5/3575 , H04N5/3577 , H04N5/378
Abstract: 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.
Abstract translation: 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。
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公开(公告)号：US20060066750A1
公开(公告)日：2006-03-30
申请号：US11235465
申请日：2005-09-26
Applicant: Robert Henderson , Matthew Purcell , Graeme Storm
Inventor： Robert Henderson , Matthew Purcell , Graeme Storm
IPC: H04N5/235
CPC classification number: H04N5/35581 , H04N5/23245 , H04N5/343 , H04N5/3452 , H04N5/3532
Abstract: 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.
Abstract translation: 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。
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公开(公告)号：US20060049334A1
公开(公告)日：2006-03-09
申请号：US11223558
申请日：2005-09-09
Applicant: Robert Henderson , Matthew Purcell
Inventor： Robert Henderson , Matthew Purcell
IPC: H01L27/00
CPC classification number: H03M1/1023 , H03M1/123 , H03M1/56 , H04N5/3575 , H04N5/361 , H04N5/3651 , H04N5/374 , H04N5/378
Abstract: The image sensor makes use of a distributed amplifier having its non-inverting input provided by a pixel amplifier transistor, and its inverting input and output provided in the pixel's column circuitry. The distributed amplifier is directly integrated with the image sensor's ADC circuit, and sampling and autozero are performed in a single step, thus reducing the number of noise contributions made by the components of the image sensor's readout chain.
Abstract translation: 图像传感器利用具有由像素放大器晶体管提供的其非反相输入的分布式放大器，并且其反相输入和输出设置在像素的列电路中。 分布式放大器与图像传感器的ADC电路直接集成，采样和自动调零在一个步骤中执行，从而减少了图像传感器读出链组件产生的噪声数量。
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