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1. 发明授权

US5192920A High-sensitivity, low-noise transistor amplifier 失效
标题翻译：高灵敏度，低噪声晶体管放大器
公开(公告)号：US5192920A
公开(公告)日：1993-03-09
申请号：US854046
申请日：1992-03-18
申请人： Edward T. Nelson , Eric G. Stevens , David M. Boisvert
发明人： Edward T. Nelson , Eric G. Stevens , David M. Boisvert
IPC分类号： H03F1/34 , H03F1/02 , H03F3/345 , H03F3/70
CPC分类号： H03F1/0233 , H03F3/345 , H03F2200/372
摘要： A high-gain, low-noise transistor amplifier comprises an input, an output, and first and second field effect transistors each having a gate, a drain, and a source and being formed in a common semiconductor substrate. The second transistor is a depletion mode transistor if it is of the same conductivity type as the first but is an enhancement mode transistor if it is of opposite conductivity type with respect to the first. In an amplifier configuration, the input is coupled to the gate of the first transistor, the source of the first transistor is coupled to the gate of the second transistor, the source of the second transistor is coupled to the output, and there is a direct-coupled feedback path from the source of the second transistor to the drain of the first transistor. At least the first transistor is formed in an isolated well of conductivity opposite to that of the substrate in the semiconductor substrate and its source is coupled directly to that well.

2. 发明授权

US4908518A Interline transfer CCD image sensing device with electrode structure for each pixel 失效
标题翻译：线间传输CCD图像传感装置，每个像素具有电极结构
公开(公告)号：US4908518A
公开(公告)日：1990-03-13
申请号：US309646
申请日：1989-02-10
申请人： David L. Losee , Timothy J. Tredwell , David M. Boisvert
发明人： David L. Losee , Timothy J. Tredwell , David M. Boisvert
IPC分类号： H01L27/148 , H01L29/768 , H04N5/3728
CPC分类号： H01L29/76841 , H01L27/14831
摘要： In interline transfer type are image sensor wherein photogenerated charge is transferred from a pixel into a charge coupled dvice (CCD) or shift register. The CCD structure is typically composed of two or more overlapping levels of polysilicon electrodes associated with each row of pixels. In accordance with invention, a CCD with simplified structure and hence improved manufacturability is described. The CCD utilizes ion implanted barrier regions, which may be self-aligned such as described by Losee et al. U.S. Pat. No. 4,613,402, to produce a device with single polysilicon electrode associated with each pixel.
摘要翻译：在线间传输类型是其中光生电荷从像素传输到电荷耦合装置（CCD）或移位寄存器的图像传感器。 CCD结构通常由与每行像素相关联的两个或更多个重叠电平的多晶硅电极组成。根据本发明，描述了具有简化结构并因此提高可制造性的CCD。 CCD利用离子注入的势垒区，其可以是自对准的，如Losee等人所述。美国专利产生具有与每个像素相关联的单个多晶硅电极的器件的第4,613,402号。

3. 发明授权

US5235412A Electronic color imaging system and analog signal processor therefor 失效
标题翻译：电子彩色成像系统及其模拟信号处理器
公开(公告)号：US5235412A
公开(公告)日：1993-08-10
申请号：US930137
申请日：1992-08-17
申请人： David M. Boisvert , Charles V. Stancampiano
发明人： David M. Boisvert , Charles V. Stancampiano
IPC分类号： H04N9/04 , H04N9/07 , H04N9/73
CPC分类号： H04N9/045
摘要： There is disclosed an electronic imaging system employing a high efficiency CCD imaging unit and a plurality of unique analog signal processors (ASP's). The ASP's operate in unison for receiving a first color sequence, such as cyan (C), yellow (Y), and green (G), of color-component pixel image signals from the CCD unit and for providing respective output image signals of a second sequence of color components such as blue (B), red (R), and green (G), having proper white balance for combining into a high definition full color image. The dark background or zero level of the output image signals is referenced to a common "dark" reference voltage to minimize dark background variations in the combined color image. Each ASP is substantially identical and has a unique architecture which facilitates its implementation as an integrated circuit. The ASP has a dynamic range of substantially better than 8-bits and provides for a wide range of signal sample rates (e.g., 1 to 40 MHz). By employing masks of certain colors such as C, Y and G in the CCD unit itself higher efficiency and lower noise is obtained than by using colors such as R, G, and B.
摘要翻译：公开了采用高效CCD成像单元和多个独特的模拟信号处理器（ASP）的电子成像系统。 ASP一起工作以从CCD单元接收颜色分量像素图像信号的第一颜色序列，例如青色（C），黄色（Y）和绿色（G）），并提供相应的输出图像信号具有蓝色（B），红色（R）和绿色（G）的颜色分量的第二序列，具有用于组合成高清晰度全色图像的适当的白平衡。输出图像信号的暗背景或零电平参考通用的“暗”参考电压，以最小化组合彩色图像中的暗背景变化。每个ASP基本相同，并且具有便于其作为集成电路实现的独特架构。 ASP具有明显优于8位的动态范围，并且提供宽范围的信号采样率（例如，1至40MHz）。通过在CCD单元本身中使用诸如C，Y和G之类的某些颜色的掩模，比通过使用诸如R，G和B的颜色获得更高的效率和更低的噪声。

4. 发明授权

US06968093B1 Pixel processing system for image scanning applications 有权
标题翻译：用于图像扫描应用的像素处理系统
公开(公告)号：US06968093B1
公开(公告)日：2005-11-22
申请号：US09957946
申请日：2001-09-20
申请人： David M. Boisvert , Joseph D. Clark , Robert James LeBoeuf II , Andrew Kenneth John McMahon , Michael Joseph Maigret
发明人： David M. Boisvert , Joseph D. Clark , Robert James LeBoeuf II , Andrew Kenneth John McMahon , Michael Joseph Maigret
IPC分类号： G06K9/38 , H04N1/191 , H04N1/401
CPC分类号： H04N1/401 , H04N1/00013 , H04N1/00018 , H04N1/00023 , H04N1/00031 , H04N1/00063 , H04N1/00068 , H04N1/00087 , H04N1/191
摘要： A linear pixel-array processing systems uses a combination of digital and analog signal processing techniques to calibrate the gain and offset of each pixel in the analog domain. A plurality of fixed gain and offset values are applied in the analog domain to adjust the gain and offset of each pixel at high speeds (on the order of 25–50 MHz). By adjusting the gain and offset in the analog domain, the dynamic range of pixel conversion is improved such that the conversion range is fully utilized (over 90%, on the order of 95%–99%). The gain and offset values are determined with an algorithmic calibration routine that corrects for non-ideal effects in the signal path. A single processing channel can be multiplexed to process multiple pixel arrays to provide for a cost effective solution. In higher speed systems, the single processing channel can be extended to multiple processing channels for improved throughput.
摘要翻译：线性像素阵列处理系统使用数字和模拟信号处理技术的组合来校准模拟域中每个像素的增益和偏移。在模拟域中应用多个固定的增益和偏移值，以便在高速（大约25-50 MHz）上调整每个像素的增益和偏移。通过调整模拟域中的增益和偏移量，可以提高像素转换的动态范围，使得转换范围得到充分利用（超过90％，大约为95％-99％）。增益和偏移值通过校正信号路径中非理想效应的算法校准程序来确定。单个处理通道可以被多路复用以处理多个像素阵列以提供成本有效的解决方案。在高速系统中，单处理通道可以扩展到多个处理通道，以提高吞吐量。

5. 发明授权

US5329312A DC level control circuitry for CCD images 失效
标题翻译：用于CCD图像的直流电平控制电路
公开(公告)号：US5329312A
公开(公告)日：1994-07-12
申请号：US931245
申请日：1992-08-17
申请人： David M. Boisvert , Michael J. Gaboury , Gregory O. Moberg
发明人： David M. Boisvert , Michael J. Gaboury , Gregory O. Moberg
IPC分类号： H04N5/18 , H04N5/361 , H04N5/372 , H04N5/378 , H04N5/52 , H04N9/73
CPC分类号： H04N5/372 , H04N5/18 , H04N5/361 , H04N5/52
摘要： There are disclosed electronic imaging systems employing CCD imaging units and one or more unique analog signal processors (ASP's). Each ASP receives color-component image signals from the CCD unit and provides respective output image signals, such as red, green and blue color components, having proper white balance for combining into a full color image. The dark background or zero level of the output image signals is referenced to a common "dark" reference voltage to minimize dark background variations in the combined color image regardless of the gain setting of the ASP or ASP's. Each ASP is substantially identical and has a unique architecture which facilitates its implementation as an integrated circuit. The ASP has a dynamic range of substantially better than 8-bits and provides for a wide range of signal sample rates (e.g., 1 to 40 MHz).
摘要翻译：公开了采用CCD成像单元和一个或多个唯一模拟信号处理器（ASP）的电子成像系统。每个ASP从CCD单元接收彩色分量图像信号，并且提供相应的输出图像信号，例如具有适当的白平衡的输出图像信号，例如红色，绿色和蓝色分量，用于组合成全色图像。输出图像信号的暗背景或零电平参考通用的“暗”参考电压，以尽可能减少组合彩色图像中的暗背景变化，而不管ASP或ASP的增益设置如何。每个ASP基本相同，并且具有便于其作为集成电路实现的独特架构。 ASP具有明显优于8位的动态范围，并且提供宽范围的信号采样率（例如，1至40MHz）。

6. 发明授权

US06587143B1 Correlated double sampler with single amplifier 有权
标题翻译：相关双采样器与单放大器
公开(公告)号：US06587143B1
公开(公告)日：2003-07-01
申请号：US09233018
申请日：1999-01-19
申请人： David M. Boisvert
发明人： David M. Boisvert
IPC分类号： H04N5217
CPC分类号： H04N5/361 , G11C27/026 , H04N5/3575 , H04N5/378
摘要： A correlated double sampler (CDS) circuit having a ping/pong architecture which employs only a single amplifier, and a CCD image sensor output processing circuit including such a CDS circuit and preferably also an analog-to-digital converter for processing the output of the CDS circuit and a black level correction feedback loop. In one cycle of operation (during processing of the raw output of a CCD sensor), the CDS circuit receives a first set of control signals followed by a second set of control signals, its output signal in response to the first set is indicative of the value of one pixel of a sensed image, and its output signal in response to the second set is indicative of the value of the next pixel of the image. Preferably, each set of control signals consists of a clamp signal, a sample signal, and a hold signal. Since the output signal of the CDS circuit has the same offset voltage for all pixels of an image, black level correction can be implemented using only one black level correction feedback loop. Use of a single amplifier (rather than two) and one black level correction loop (rather than two) reduces power consumption. Preferably, the amplifier of the CDS circuit produces a differential output so that the CDS circuit has a better power supply rejection ratio than do conventional CDS circuits. Also preferably, the invention is implemented with CMOS technology as an integrated circuit or portion of an integrated circuit.
摘要翻译：具有仅使用单个放大器的乒乓架构的相关双采样器（CDS）电路和包括这种CDS电路的CCD图像传感器输出处理电路，并且优选地还包括用于处理 CDS电路和黑电平校正反馈回路。在一个操作周期（在CCD传感器的原始输出的处理期间），CDS电路接收第一组控制信号，随后是第二组控制信号，其响应于第一组的输出信号指示感测图像的一个像素的值及其响应于第二组的输出信号表示图像的下一个像素的值。优选地，每组控制信号由钳位信号，采样信号和保持信号组成。由于CDS电路的输出信号对于图像的所有像素具有相同的偏移电压，所以可以仅使用一个黑电平校正反馈环来实现黑电平校正。使用单个放大器（而不是两个）和一个黑电平校正环路（而不是两个）可以降低功耗。优选地，CDS电路的放大器产生差分输出，使得CDS电路具有比常规CDS电路更好的电源抑制比。还优选地，本发明通过CMOS技术实现为集成电路或集成电路的一部分。

7. 发明授权

US5973540A Ladder tracking buffer amplifier 失效
标题翻译：梯形跟踪缓冲放大器
公开(公告)号：US5973540A
公开(公告)日：1999-10-26
申请号：US12774
申请日：1998-01-23
申请人： David M. Boisvert
发明人： David M. Boisvert
IPC分类号： G06G7/12 , H03F1/30
CPC分类号： H03F1/301
摘要： A structure and a method are provided to receive a high-impedance reference voltage signal and generate a desired output signal that is capable of sourcing enough current to meet the demands of a fixed-resistance load. In such a circuit, the signal from an accurate, wide output-swing voltage source circuit having low quiescent current is combined with the output of a current source circuit so that the voltage input to the load is maintained even as the necessary current is supplied. The current source circuit preferably includes a tracking resistance that sinks a control current which a current mirror multiplies by the same ratio as that between the tracking resistance and the load resistance. In addition, it is preferable for the tracking resistance to be large compared to the load resistance, in order to minimize quiescent current draw, and also for the tracking resistors to be created and located at the same time and place as the load resistance, to minimize the effects of sheet resistance variations and temperature changes.
摘要翻译：提供了一种结构和方法来接收高阻抗参考电压信号并产生能够提供足够电流以满足固定电阻负载需求的期望输出信号。在这种电路中，来自具有低静态电流的精确，宽的输出摆幅电压源电路的信号与电流源电路的输出组合，使得即使在所需电流被提供时也保持输入到负载的电压。电流源电路优选地包括跟踪电阻，其吸收电流镜与跟踪电阻和负载电阻之间的比例相同的控制电流。此外，与负载电阻相比，为了使静态电流消耗最小化，并且对于跟踪电阻器的产生和位置与负载电阻相同，优选跟踪电阻相对于最小化薄层电阻变化和温度变化的影响。

8. 发明授权

US5276508A Analog signal processor for electronic imaging system providing highly accurate reproduction of images 失效
标题翻译：用于电子成像系统的模拟信号处理器，提供图像的高精度再现
公开(公告)号：US5276508A
公开(公告)日：1994-01-04
申请号：US971885
申请日：1992-11-05
申请人： David M. Boisvert , Charles E. McLellan
发明人： David M. Boisvert , Charles E. McLellan
IPC分类号： H04N5/14 , H04N9/73 , H04N9/07
CPC分类号： H04N9/735 , H04N5/148
摘要： An electronic imaging system employes a linear charge coupled device (CCD) imaging unit and a unique analog signal processor (ASP) implemented on a single integrated circuit chip. The ASP has a plurality of matched signal channels for receiving respective pixel image signals from the CCD unit and for providing respective color-component image signals, such as red, green and blue color-components, having amplitude balance and accurately referenced "zero" levels. The ASP also has a plurality of matched multiplexing units which directly combine the separate color-component signals from the signal channels into a single full color output image signal with the color components in timed sequence. The output signal from the ASP is applied to an analog to digital (A/D) converter and then to a digital signal processor (DSP). By virtue of its unique design, the ASP has a dynamic range of greater than 12-bits with an output signal frequency as high as 20 MHz for high throughput rates.
摘要翻译：电子成像系统采用在单个集成电路芯片上实现的线性电荷耦合器件（CCD）成像单元和独特的模拟信号处理器（ASP）。 ASP具有多个匹配的信号通道，用于从CCD单元接收相应的像素图像信号，并且用于提供具有幅度平衡和精确参考的“零”电平的相应颜色分量图像信号，例如红色，绿色和蓝色分量。 ASP还具有多个匹配的多路复用单元，其将来自信号通道的分离的颜色分量信号直接组合成具有定时序列中的颜色分量的单个全色输出图像信号。来自ASP的输出信号被应用于模数（A / D）转换器，然后被应用于数字信号处理器（DSP）。凭借其独特的设计，ASP具有大于12位的动态范围，对于高吞吐率，输出信号频率高达20 MHz。

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