公开(公告)号：US5734680A

公开(公告)日：1998-03-31

申请号：US513188

申请日：1995-08-09

申请人： Charles E. Moore ,  Richard A. Baumgartner ,  Travis N. Blalock ,  Thomas M. Walley ,  Robert A. Zimmer ,  Rajeev Badyal ,  Li Ching Tsai ,  Larry S. Metz ,  Sui-Hing Leung ,  James S. Ignowski ,  Kenneth R. Stafford ,  Ran-Fun Chiu ,  Richard A. Baugh

发明人： Charles E. Moore ,  Richard A. Baumgartner ,  Travis N. Blalock ,  Thomas M. Walley ,  Robert A. Zimmer ,  Rajeev Badyal ,  Li Ching Tsai ,  Larry S. Metz ,  Sui-Hing Leung ,  James S. Ignowski ,  Kenneth R. Stafford ,  Ran-Fun Chiu ,  Richard A. Baugh

IPC分类号： G11B5/09 ,  G11B20/10 ,  H04L5/12

CPC分类号： G11B5/09 ,  G11B20/10009

摘要： An analog, fully integrated, partial response maximum likelihood (PRML) read channel utilizing a high-performance analog delay line, an analog adaptive equalizer and an analog Viterbi detector is provided, resulting in saved space, performance gains, and lower power consumption. For signal detection and reconstruction used in read operations, the partial response maximum likelihood (PRML) read channel includes a variable gain amplifier coupled to a lowpass filter for input to an adaptive analog equalizer. The adaptive analog equalizer comprises an analog delay line and an analog feedforward equalizer (FFE). An analog Viterbi detector employs maximum-likelihood sequence estimation (MLSE) techniques to performs the signal detection function. A decoder/descrambler produces a final reconstructed signal. The analog implementation of a partial response maximum likelihood (PRML) read channel also includes a scrambler/encoder coupled to a write precompensation circuit for output to a separate write head.

摘要翻译： 提供了利用高性能模拟延迟线的模拟，完全集成的部分响应最大似然（PRML）读取通道，模拟自适应均衡器和模拟维特比检测器，从而节省空间，提高性能并降低功耗。 对于在读操作中使用的信号检测和重建，部分响应最大似然（PRML）读通道包括耦合到低通滤波器的可变增益放大器，用于输入到自适应模拟均衡器。 自适应模拟均衡器包括模拟延迟线和模拟前馈均衡器（FFE）。 模拟维特比检测器采用最大似然序列估计（MLSE）技术来执行信号检测功能。 解码器/解扰器产生最终的重构信号。 部分响应最大似然（PRML）读通道的模拟实现还包括耦合到写预补偿电路的加扰器/编码器，以输出到单独的写头。

公开(公告)号：US5729008A

公开(公告)日：1998-03-17

申请号：US591847

申请日：1996-01-25

申请人： Travis N. Blalock ,  Richard A. Baumgartner ,  Thomas Hornak ,  Mark T. Smith

发明人： Travis N. Blalock ,  Richard A. Baumgartner ,  Thomas Hornak ,  Mark T. Smith

IPC分类号： G01N21/86 ,  G01S3/786 ,  H04N1/047 ,  H04N1/107 ,  H01J40/14

CPC分类号： G06K9/228 ,  G01S3/7865 ,  H04N1/047 ,  H04N1/107 ,  H04N2201/04729

摘要： A method and device for tracking relative movement between the device and a region of interest include correlating a reference frame of signals with a subsequently acquired sample frame of signals, with the correlating including generating a correlation output for each of a number of nearest-neighbor shifts of signals of one of the frames. Preferably, the frames are comprised of a two-dimensional array of pixels and the signals are pixel values. The pixels of a frame are operatively associated with photoelements in a two-dimensional array of photoelements, with the pixel values being indicative of light energy received at the photoelements. By correlating the reference frame and the sample frame using the nearest-neighbor approach, it is possible to determine the movement of an imaged feature during the time period between acquisition of the reference frame and acquisition of the sample frame. In the preferred embodiment, the pixel values of the reference frame may be selectively shifted to correspond to the movement of the image feature, allowing the nearest-neighbor approach to continue even after the relative movement exceeds a pixel length. Also in the preferred embodiment, the device is a scanner having a second photoelement array. The second photoelement array captures image data which is position-tagged by navigation data acquired by means of the correlation of reference and sample frames.

摘要翻译： 用于跟踪设备和感兴趣区域之间的相对移动的方法和设备包括将信号的参考帧与随后获取的信号采样帧相关联，其中相关包括为多个最近邻位移中的每一个生成相关输出 的一个帧的信号。 优选地，帧由像素的二维阵列组成，并且信号是像素值。 帧的像素可操作地与光元件的二维阵列中的光元件相关联，像素值表示在光电元件处接收的光能。 通过使用最近邻方法对参考帧和采样帧进行相关，可以在采集参考帧和采样帧之间的时间段期间确定成像特征的移动。 在优选实施例中，可以选择性地移动参考帧的像素值以对应于图像特征的移动，从而即使在相对移动超过像素长度之后也允许最近邻近的方法继续。 同样在优选实施例中，该装置是具有第二光电元件阵列的扫描仪。 第二个光电元件阵列捕获通过参考和采样帧的相关性获取的导航数据进行位置标记的图像数据。

公开(公告)号：US5769384A

公开(公告)日：1998-06-23

申请号：US591848

申请日：1996-01-25

申请人： Richard A. Baumgartner ,  Travis N. Blalock ,  Thomas Hornak ,  Joey Doernberg

发明人： Richard A. Baumgartner ,  Travis N. Blalock ,  Thomas Hornak ,  Joey Doernberg

IPC分类号： H01L27/14 ,  H01L27/146 ,  H01L31/10 ,  H04N1/028 ,  H04N1/047 ,  H04N1/107 ,  H04N5/335 ,  H03F1/34

CPC分类号： H01L27/14643 ,  H04N1/047 ,  H04N3/155 ,  H04N1/107 ,  H04N2201/04712

摘要： Circuitry and circuitry layout are provided to achieve a high percentage of photoreceiver area to total area and to stabilize the voltage at the base node of a phototransistor. Voltage stabilization is achieved by a servo circuit in which a negative feedback loop from the base node to an emitter node maintains a bias point, so that photocurrent is efficiently delivered to charge transfer circuitry. In the preferred embodiment, the base node is connected to a gate of a first transistor having a drain that is connected to a source of constant current and to a gate of a second transistor that functions as a source follower. The source of the second transistor is connected to the emitter node of a phototransistor. As photocurrent is generated by the reception of light, an integration capacitor is charged. The relatively high percentage of photoreceiver area to total area is achieved by contributions from a number of factors, including the design of the servo circuit, use of a single transfer amplifier to service an entire row of phototransistors, and pairing the phototransistor circuits in order to permit efficient sharing of common circuit paths and circuit components.

摘要翻译： 提供了电路和电路布局以实现高百分比的光接收器面积到总面积并稳定光电晶体管的基极节点处的电压。 电压稳定通过伺服电路实现，其中从基极节点到发射极节点的负反馈回路保持偏置点，使得光电流被有效地传送到电荷传输电路。 在优选实施例中，基极节点连接到具有连接到恒定电流源的漏极和用作源极跟随器的第二晶体管的栅极的第一晶体管的栅极。 第二晶体管的源极连接到光电晶体管的发射极节点。 由于通过光的接收产生光电流，因此对积分电容器进行充电。 光接收器面积对总面积的相对高的百分比是通过许多因素的贡献来实现的，包括伺服电路的设计，使用单个传递放大器来维护整行光电晶体管，以及将光电晶体管电路配对，以便 允许有效共享公共电路路径和电路组件。

公开(公告)号：US5703353A

公开(公告)日：1997-12-30

申请号：US591076

申请日：1996-01-25

申请人： Travis N. Blalock ,  Richard A. Baumgartner ,  Thomas Hornak ,  David Beard

发明人： Travis N. Blalock ,  Richard A. Baumgartner ,  Thomas Hornak ,  David Beard

IPC分类号： H04N1/028 ,  H01L31/10 ,  H03F1/30 ,  H03F3/08 ,  H03F3/45 ,  H04N1/107 ,  H04N1/19 ,  H04N5/217 ,  H04N5/365 ,  H04N5/378 ,  H01J40/14

CPC分类号： H03F3/45475 ,  H03F1/303 ,  H03F3/087 ,  H04N5/3651 ,  H04N5/3658 ,  H04N5/3692 ,  H04N5/3742 ,  H04N5/3745 ,  H04N5/378 ,  H03F2200/249 ,  H03F2203/45212

摘要： Circuitry and method for transferring signals from a photoreceiver array to computational circuitry includes parallel transfer amplifiers that receive periodic offset correction and includes DC removal amplifiers. In a first embodiment, each transfer amplifier has a differential circuit that can be switched from a reset mode to a readout mode. In the readout mode, the voltage state at the output is responsive to first and second inputs, with the second input being connected to a source of a reference voltage. In the reset mode, the inputs are both connected to the reference voltage and the output is temporarily connected to a source of a fixed reset voltage. An offset adjustment signal is generated in response to detection of a voltage difference between the reset voltage and the actual voltage state at the output after the output has been disconnected from the source of the reset voltage. A single offset circuit is used to periodically and sequentially refresh the various transfer amplifiers. In a second embodiment, spatial frequency components at both low and high frequencies are removed from the outputs of the photoreceiver array by DC removal amplifiers. Each DC removal amplifier is assigned to a particular photoelement in the array, but receives outputs from one or more other photoelements in the array. The output of the amplifier is responsive to the differences between the analog signals input to the amplifier.

摘要翻译： 将信号从光接收器阵列传送到计算电路的电路和方法包括接收周期性偏移校正并包括直流去除放大器的并行传输放大器。 在第一实施例中，每个传送放大器具有可从复位模式切换到读出模式的差分电路。 在读出模式下，输出端的电压状态响应于第一和第二输入，第二输入端连接到参考电压源。 在复位模式下，输入端都连接到参考电压，输出暂时连接到固定复位电压源。 响应于在输出与复位电压源断开之后检测到复位电压和输出端的实际电压状态之间的电压差而产生偏移调整信号。 单个偏移电路用于周期性地并顺序地刷新各种传输放大器。 在第二实施例中，通过DC去除放大器从光接收器阵列的输出去除低频和高频两个空间频率分量。 每个DC去除放大器被分配给阵列中的特定光电元件，但是接收阵列中一个或多个其他光电元件的输出。 放大器的输出响应输入到放大器的模拟信号之间的差异。

公开(公告)号：US20100168578A1

公开(公告)日：2010-07-01

申请号：US12664146

申请日：2008-06-12

申请人： Arthur Garson, JR. ,  William F. Walker ,  John A. Hossack ,  Travis N. Blalock

发明人： Arthur Garson, JR. ,  William F. Walker ,  John A. Hossack ,  Travis N. Blalock

IPC分类号： A61B8/14 ,  A61B5/0402

CPC分类号： A61B8/0858 ,  A61B8/0883 ,  A61B8/483

摘要： A system and related method for obtaining volumetric cardiac data of a subject. The data is generated by forming a plurality of focused ultrasound images corresponding to a series of ranges, generating myocardial boundary data for each of the plurality of ultrasound images, calculating the area of the region defined by said myocardial boundary data for each of the plurality of ultrasound images, multiplying the area for each of the plurality of ultrasound images by a slice depth corresponding to said ultrasound image to obtain the slice volume of each slice, and summing the slice volumes to obtain a total volume. In an alternative embodiment the system and related method combine an automated volumetric ultrasound system for finding chamber volumes and myocardial thicknesses, with a diagnostic electrocardiogram system to enable simultaneous diagnosis of mechanical and electrical cardiac problems.

摘要翻译： 用于获得受试者体积心脏数据的系统和相关方法。 通过形成对应于一系列范围的多个聚焦超声图像来生成数据，为多个超声图像中的每一个生成心肌边界数据，计算由多个超声图像中的每一个的所述心肌边界数据定义的区域的面积 超声图像，将所述多个超声图像中的每一个的面积乘以对应于所述超声图像的切片深度，以获得每个切片的切片体积，并且对切片体积求和以获得总体积。 在替代实施例中，系统和相关方法结合了用于发现腔室体积和心肌厚度的自动化体积超声系统与诊断心电图系统，以实现机电和电心脏问题的同时诊断。

公开(公告)号：US06441829B1

公开(公告)日：2002-08-27

申请号：US09409236

申请日：1999-11-18

申请人： Travis N. Blalock ,  Ken Nishimura

发明人： Travis N. Blalock ,  Ken Nishimura

IPC分类号： G09G500

CPC分类号： G09G3/3688 ,  G09G3/20 ,  G09G3/2014 ,  G09G3/3607 ,  G09G3/3651 ,  G09G2300/0809 ,  G09G2300/0842 ,  G09G2300/0857 ,  G09G2310/0235 ,  G09G2310/0259 ,  G09G2310/027 ,  G09G2320/0204

摘要： A digital pixel driver that operates in response to an M-bit digital input value defining the apparent brightness of the pixel. The pixel driver generates a pixel drive signal having a duty cycle that sets the apparent brightness of the pixel. The pixel driver comprises a memory, a digital sequence generator and a comparator. The memory receives and stores an N-bit word that represents the digital input value. The digital sequence generator generates a digital sequence of P-bit digital values that defines the temporal duration of the pixel drive signal and includes a first P-bit word that represents at least part of the digital input value at a location temporally corresponding to the duty cycle of the pixel drive signal as defined by the at least part of the digital input value. The comparator is connected to receive the digital sequence from the digital sequence generator and a second P-bit word from the memory. The second P-bit word constitutes at least part of the N-bit word. The comparator includes an output that provides the pixel drive signal and that changes state in response to correspondence between the first P-bit word and the second P-bit word.

摘要翻译： 数字像素驱动器，响应于定义像素的表观亮度的M位数字输入值而工作。 像素驱动器产生具有设置像素的表观亮度的占空比的像素驱动信号。 像素驱动器包括存储器，数字序列发生器和比较器。 存储器接收并存储表示数字输入值的N位字。 数字序列发生器产生定义像素驱动信号的时间持续时间的P位数字值的数字序列，并且包括在时间上对应于占空比的位置处表示数字输入值的至少一部分的第一P位字 由数字输入值的至少一部分定义的像素驱动信号的周期。 连接比较器以从数字序列发生器接收数字序列，并从存储器接收第二个P位字。 第二P位字构成N位字的至少一部分。 比较器包括提供像素驱动信号并且响应于第一P位字和第二P位字之间的对应关系而改变状态的输出。

公开(公告)号：US20100063399A1

公开(公告)日：2010-03-11

申请号：US12543452

申请日：2009-08-18

申请人： William F. Walker ,  Michael I Fuller ,  Karthik Ranganathan ,  John A. Hossack ,  Travis N. Blalock

发明人： William F. Walker ,  Michael I Fuller ,  Karthik Ranganathan ,  John A. Hossack ,  Travis N. Blalock

IPC分类号： A61B8/00 ,  G01N29/36 ,  G06K9/00

CPC分类号： G01N29/0654 ,  A61B8/00 ,  A61B8/4483 ,  G01N2291/02475 ,  G01S7/52026 ,  G01S7/52046 ,  G01S7/52079 ,  G01S15/8959

摘要： Pulse-echo imaging systems and methods are provided, including a transmit code sequencer and a pulse generation circuit, The transmit code sequencer is configured to input a transmit code sequence to the pulse generation circuit. A transducer is configured to receive electrical signals provided as pulses using coded excitation according to the transmit code sequence, and to transduce the electrical signals to pulses of energy other than electrical signals. The transducer is further configured to receive echoes of the pulses of energy other than electrical signals and convert the echoes to received electrical signals generate using coded excitation. A receive circuit is configured to receive the received electrical signals generate using coded excitation, perform analog sampling of the received electrical signals generate using coded excitation, and provide a weighted, summed digital signal by processing the analog samples. At least one example of a pulse imaging system described is configured for ultrasonic pulse-echoes. At least one example of a pulse imaging system described is a medical diagnostic imaging system.

摘要翻译： 提供脉冲回波成像系统和方法，包括发射码序列器和脉冲发生电路。发送码序列器被配置为向脉冲发生电路输入发射码序列。 传感器被配置为接收根据发射码序列使用编码激励的脉冲提供的电信号，并将电信号转换成电信号以外的能量脉冲。 换能器还被配置为接收除电信号之外的能量脉冲的回波，并将回波转换成使用编码激励产生的接收电信号。 接收电路被配置为接收使用编码激励产生的接收电信号，对使用编码激励产生的接收电信号进行模拟采样，并通过处理模拟采样来提供加权的相加的数字信号。 所描述的脉冲成像系统的至少一个示例被配置用于超声脉冲回波。 所描述的脉冲成像系统的至少一个示例是医学诊断成像系统。

公开(公告)号：US20090048519A1

公开(公告)日：2009-02-19

申请号：US11840079

申请日：2007-08-16

申请人： John A. Hossack ,  Travis N. Blalock ,  William F. Walker

发明人： John A. Hossack ,  Travis N. Blalock ,  William F. Walker

IPC分类号： A61B8/00

CPC分类号： B06B1/0629 ,  A61B8/4483 ,  A61B8/483 ,  G01S15/8913 ,  G01S15/8915 ,  G10K11/004

摘要： An ultrasound transducer array having a transmit transducer element comprising a transmit transducer material interposed between a transmit electrode and a reference electrode, wherein voltages applied across the transmit electrode and reference electrode induce an acoustic wave to emanate from the transmit transducer material; and a plurality of receive transducer elements positioned in an array on the transmit transducer element, each of the plurality of the receive transducer elements comprising a receive electrode and a receive transducer material interposed between the receive electrode and the reference electrode, and wherein acoustic waves applied to the plurality of receive transducer elements induces receive voltage signals on the receive electrodes with respect to the reference electrode.

摘要翻译： 一种具有发射换能器元件的超声换能器阵列，其包括插入在发射电极和参考电极之间的发射换能器材料，其中施加在所述发射电极和参考电极两端的电压引起从所述发射换能器材料发出的声波; 以及多个接收换能器元件，其定位在所述发射换能器元件上的阵列中，所述多个所述接收换能器元件中的每一个包括插入在所述接收电极和所述参考电极之间的接收电极和接收换能器材料，并且其中施加声波 到多个接收换能器元件相对于参考电极在接收电极上感应出接收电压信号。

公开(公告)号：US07274808B2

公开(公告)日：2007-09-25

申请号：US10419226

申请日：2003-04-18

申请人： Izhak Baharav ,  Travis N. Blalock ,  Akihiro Machida ,  George E. Smith ,  Jin Kiong Ang

发明人： Izhak Baharav ,  Travis N. Blalock ,  Akihiro Machida ,  George E. Smith ,  Jin Kiong Ang

IPC分类号： G06K9/00 ,  G06K9/20

CPC分类号： G06F3/0421 ,  G06F2203/04109 ,  G06K9/00026

摘要： An imaging system for imaging a fingerprint operates in at least two different modes to provide both finger recognition and finger navigation applications. A light source illuminates a swipe interface having an elongated sensing area upon which a user swipes a finger. Light reflected from the finger is captured by an optical image sensor as image data representing a sequence of images resulting from motion of the digit over the sensing area of the swipe interface. The captured image data is output by the optical image sensor for processing of the data in one of the at least two different modes.

摘要翻译： 用于成像指纹的成像系统以至少两种不同的模式进行操作以提供手指识别和手指导航应用。 光源照亮具有细长感测区域的滑动界面，用户在其上滑动手指。 从手指反射的光被光学图像传感器捕获，作为表示由扫描界面的感测区域上的数字运动产生的图像序列的图像数据。 拍摄图像数据由光学图像传感器输出，用于处理至少两种不同模式之一的数据。

公开(公告)号：US06344641B1

公开(公告)日：2002-02-05

申请号：US09372359

申请日：1999-08-11

申请人： Travis N. Blalock ,  Ken A. Nishimura

发明人： Travis N. Blalock ,  Ken A. Nishimura

IPC分类号： G01J132

CPC分类号： H05B33/0869 ,  G09G3/22 ,  G09G3/3406 ,  G09G2320/041 ,  G09G2320/043 ,  G09G2320/0626 ,  G09G2320/0633 ,  G09G2360/144 ,  H05B33/0818 ,  H05B33/086

摘要： An on-chip system and method for calibrating an illumination source includes a photo-detector and intensity sense and control circuitry resident on an integrated circuit. The integrated circuit is illuminated by an illumination source, which impinges upon the photo-detector. The intensity sense and control circuitry receives the measured intensity value of the illumination source and compares the measured intensity to a predetermined value representing the desired intensity. Subject to a range of operation, the intensity sense and control circuitry adjusts the intensity of the illumination source based upon the difference between the measured illumination intensity and the desired illumination intensity.

摘要翻译： 用于校准照明源的片上系统和方法包括驻留在集成电路上的光检测器和强度感测和控制电路。 集成电路由照射源照射，照射源照射在光电检测器上。 强度感测和控制电路接收照射源的测量强度值，并将测量的强度与表示期望强度的预定值进行比较。 根据操作范围，强度感测和控制电路基于所测量的照明强度和期望的照明强度之间的差异来调节照明源的强度。