公开(公告)号：US20120277830A1

公开(公告)日：2012-11-01

申请号：US13096670

申请日：2011-04-28

申请人： Scott K. Arfin ,  Rahul Sarpeshkar

发明人： Scott K. Arfin ,  Rahul Sarpeshkar

IPC分类号： A61N1/36

CPC分类号： A61N1/36125 ,  A61N1/36146

摘要： A system and method for stimulating an electrode is provided. The stimulator includes a sensor circuit configured to couple to the at least one electrode of a medical device to measure a power characteristic of the at least one electrode. The stimulator includes a control circuit configured to compare the measured power characteristic of the at least one electrode to a desired power characteristic, and, based upon a comparison of the measured power characteristic of the at least one electrode and the desired power characteristic, select between a first operational mode and a second operational mode of the electrode stimulator. The first operational mode includes delivering energy to the at least one electrode to stimulate the tissue and the second operational mode includes recovering energy from the at least one electrode.

摘要翻译： 提供了一种用于刺激电极的系统和方法。 刺激器包括被配置为耦合到医疗装置的至少一个电极以测量至少一个电极的功率特性的传感器电路。 刺激器包括控制电路，其被配置为将所测量的至少一个电极的功率特性与期望功率特性进行比较，并且基于所测量的至少一个电极的功率特性与所需功率特性的比较， 电极刺激器的第一操作模式和第二操作模式。 第一操作模式包括向至少一个电极递送能量以刺激组织，并且第二操作模式包括从至少一个电极回收能量。

公开(公告)号：US20080027708A1

公开(公告)日：2008-01-31

申请号：US11493196

申请日：2006-07-26

申请人： Bhiksha Ramakrishnan ,  Bent Schmidt-Nielsen ,  Lorenzo Turicchia ,  Rahul Sarpeshkar

发明人： Bhiksha Ramakrishnan ,  Bent Schmidt-Nielsen ,  Lorenzo Turicchia ,  Rahul Sarpeshkar

IPC分类号： G10L19/00

CPC分类号： G10L15/02 ,  G10L15/20 ,  G10L21/0264

摘要： A method and system processes a speech signal. A fast Fourier transform is performed on a speech signal to produce a speech signal having a plurality of frequency bands in a frequency domain. For each frequency bands, filter the speech signal in the frequency domain with a spatial broadband filter, compress the broadband filtered speech signal, filter the compressed speech signal with a spatial narrowband filter; and, expand the narrowband filtered signal to an expanded signal

摘要翻译： 方法和系统处理语音信号。 对语音信号执行快速傅里叶变换，以产生在频域具有多个频带的语音信号。 对于每个频带，用空间宽带滤波器对频域中的语音信号进行滤波，压缩宽带滤波语音信号，用空间窄带滤波器对压缩语音信号进行滤波; 并且将窄带滤波信号扩展到扩展信号

公开(公告)号：US20060087362A1

公开(公告)日：2006-04-27

申请号：US11256632

申请日：2005-10-21

申请人： Micah O'Halloran ,  Rahul Sarpeshkar

发明人： Micah O'Halloran ,  Rahul Sarpeshkar

IPC分类号： H03K17/687

CPC分类号： G11C27/024 ,  G11C27/02 ,  H03K17/162

摘要： An analog storage cell circuit includes a switch that minimizes subthreshold conduction and diode leakage, as well as an accumulation-mode coupling mechanism to minimize overall switch leakage to minimize accumulation-mode leakage. In one embodiment, an analog storage circuit includes a sample and hold circuit including an amplifier having first and second inputs and a switch coupled to the first input of the amplifier. The switch includes a first switching device forming a core of the switch, a second switching device coupled to the first switching device to disconnect the first switching device from a first terminal during the hold phase, and a third switching device coupled to the first switching device to connect the first switching device to a second terminal during the hold phase to minimize accumulation mode conduction in the first switching device.

摘要翻译： 模拟存储单元电路包括使亚阈值导通和二极管泄漏最小化的开关，以及累积模式耦合机制，以最小化整体开关泄漏以最小化累积模式泄漏。 在一个实施例中，模拟存储电路包括采样和保持电路，其包括具有第一和第二输入的放大器和耦合到放大器的第一输入的开关。 开关包括形成开关的核心的第一开关装置，耦合到第一开关装置的第二开关装置，以在保持阶段期间将第一开关装置与第一端子断开;以及第三开关装置，其耦合到第一开关装置 以在保持阶段期间将第一开关器件连接到第二端子，以最小化第一开关器件中的累积模式导通。

公开(公告)号：US06882198B2

公开(公告)日：2005-04-19

申请号：US10614178

申请日：2003-07-08

申请人： Ruben Herrera ,  Rahul Sarpeshkar

发明人： Ruben Herrera ,  Rahul Sarpeshkar

IPC分类号： H03K3/356 ,  H03K3/02

CPC分类号： H03K3/356113

摘要： An edge-triggered flip-flop circuit in which a pair of capacitors are alternately charged and discharged to voltages approximating supply rail values and, in combination of with a small number of switches, present high or low impedance paths for input signal transitions of a predetermined polarity to trigger state changes. In an alternative embodiment large switching capacitors are avoided in a circuit that employs a pair of pass-transistor configurations to connect respective capacitors to output terminals of a bistable device. The voltages on the capacitors track the corresponding bistable device output voltages when the input signal is in a given state (illustratively low), and store the value of the corresponding voltage when turned off by the (illustratively high) other state of the input signal. Then, the voltage on the capacitors and the selected input signal transition is used to effectively trigger a transition in the bistable device.

摘要翻译： 边沿触发的触发电路，其中一对电容器被交替地充电并放电到接近电源轨值的电压，并且与少量开关组合地存在用于预定的输入信号转换的高或低阻抗路径 极性触发状态变化。 在替代实施例中，在采用一对传输晶体管配置以将各个电容器连接到双稳态器件的输出端子的电路中避免了大的开关电容器。 当输入信号处于给定状态（例如低电平）时，电容器上的电压跟踪相应的双稳态器件输出电压，并且当输入信号的（示例性高）其他状态被关断时，存储相应电压的值。 然后，使用电容器上的电压和所选择的输入信号转换来有效地触发双稳态器件中的转换。

公开(公告)号：US06797934B2

公开(公告)日：2004-09-28

申请号：US10154514

申请日：2002-05-23

申请人： Jörg Kramer ,  Rahul Sarpeshkar

发明人： Jörg Kramer ,  Rahul Sarpeshkar

IPC分类号： H01L3100

CPC分类号： H04N5/3745

摘要： An optical transient sensor circuit includes a photodiode in series with a MOS feedback transistor connected across a voltage difference. An inverting amplifier having its input connected to the common connection between the photodiode and the MOS feedback transistor and its output connected to an output-node for a measure of the incoming irradiance. A charge/discharge circuit, having an input connected to the output of the inverting amplifier, having an output connected to the gate of the MOS feedback transistor and having a first and second output for half-wave rectified and thresholded contrast encoding measures of positive and negative irradiance transients. A capacitor connected between a constant potential and the gate of the MOS feedback transistor.

摘要翻译： 光学瞬态传感器电路包括与跨越电压差连接的MOS反馈晶体管串联的光电二极管。 反相放大器的输入连接到光电二极管和MOS反馈晶体管之间的公共连接，其输出连接到输出节点，用于测量进入的辐照度。 具有连接到反相放大器的输出的输入的充电/放电电路具有连接到MOS反馈晶体管的栅极的输出，并且具有用于半波整流和阈值对比度编码措施的第一和第二输出为正和 负辐照瞬变。 连接在恒定电位和MOS反馈晶体管的栅极之间的电容器。

公开(公告)号：US06212289B1

公开(公告)日：2001-04-03

申请号：US09113932

申请日：1998-07-10

申请人： Rahul Sarpeshkar ,  Jörg Kramer ,  Christof Koch

发明人： Rahul Sarpeshkar ,  Jörg Kramer ,  Christof Koch

IPC分类号： G06K900

CPC分类号： G06T7/20

摘要： An integrated circuit that computes the velocity of a visual stimulus moving between two photoreceptor locations is disclosed. In its most basic version, the circuit comprises two temporal edge detectors with photoreceptors, two pulse-shaping circuits, and one motion circuit on a single silicon chip. Velocity is computed from the signed time delay of the appearance of an image feature at the two photoreceptor locations. Specifically, each temporal edge detector de tects a rapid irradiance transient at its photoreceptor location and converts it into a short current spike. This current spike is transformed into two different voltage pulses, a fast pulse and a slowly-decaying pulse, by the pulse-shaping circuit that is coupled to the temporal edge detector. The slowly-decaying voltage pulse produced at one location together with the fast voltage pulse generated at the other location, act as inputs to the motion circuit which generates a signal representative of the speed of motion for one sign or direction of motion. A pair of motion circuits encodes velocity, each motion circuit encoding speed for one of the two opposing directions of motion. The motion circuits are sample-and-hold circuits that use the fast pulse from one location to sample the slowly-decaying pulse from the other location. The individual motion-sensing cells are compact, and are therefore suited for use in dense one-dimensional or two-dimensional imaging arrays. Various embodiments are described.

摘要翻译： 公开了一种计算在两个感光体位置之间移动的视觉刺激的速度的集成电路。 在其最基本的版本中，该电路包括两个具有感光体的时间边缘检测器，两个脉冲整形电路，以及单个硅芯片上的一个运动电路。 从两个感光体位置处的图像特征的出现的带符号时间延迟计算速度。 具体地，每个时间边缘检测器在感光器位置处检测快速辐照瞬态并将其转换成短电流尖峰。 该电流尖峰通过耦合到时间边缘检测器的脉冲整形电路转换成两个不同的电压脉冲，即快速脉冲和缓慢衰减的脉冲。 在一个位置处产生的缓慢衰减的电压脉冲以及在另一个位置处产生的快速电压脉冲一起作为运动电路的输入，该运动电路产生代表一个运动速度的运动速度的信号。 一对运动电路对速度进行编码，每个运动电路编码两个相反的运动方向之一的速度。 运动电路是采样和保持电路，其使用来自一个位置的快速脉冲从另一个位置采样缓慢衰减的脉冲。 各个运动感测单元是紧凑的，因此适用于致密的一维或二维成像阵列。 描述各种实施例。

公开(公告)号：US20110279079A1

公开(公告)日：2011-11-17

申请号：US13104188

申请日：2011-05-10

申请人： Bruno Guimaraes Do Valle ,  Christian T. Wentz ,  Rahul Sarpeshkar

发明人： Bruno Guimaraes Do Valle ,  Christian T. Wentz ,  Rahul Sarpeshkar

IPC分类号： H02J7/04

CPC分类号： H02J7/04 ,  H02J7/0073

摘要： Described is a battery charger circuit for charging a battery. The battery charger circuit comprises a control element having a first input configured to receive an input from a reference source, a second input configured to receive an input from the battery and an output, said control element having an output current response characteristic which varies with respect to the battery input such that said control element implements a saturating function that causes the charging current of the battery to automatically transition between a constant current operating mode and a constant voltage operating mode or a constant voltage operating mode to a constant current operating mode.

摘要翻译： 描述了一种用于对电池充电的电池充电器电路。 电池充电器电路包括具有第一输入的控制元件，第一输入被配置为接收来自参考源的输入，被配置为接收来自电池的输入的第二输入和输出，所述控制元件具有输出电流响应特性，所述输出电流响应特性相对于 使得所述控制元件实现饱和功能，其使得电池的充电电流在恒定电流操作模式和恒定电压操作模式或恒定电压操作模式之间自动转换到恒定电流操作模式。

公开(公告)号：US20110251652A1

公开(公告)日：2011-10-13

申请号：US13083014

申请日：2011-04-08

申请人： Jongyoon Han ,  Yong-Ak Song ,  Amr Rabie ,  Rahul Sarpeshkar ,  Samuel J. Lin

发明人： Jongyoon Han ,  Yong-Ak Song ,  Amr Rabie ,  Rahul Sarpeshkar ,  Samuel J. Lin

IPC分类号： A61N1/36 ,  C12N13/00

CPC分类号： A61N1/3605 ,  A61N1/0553 ,  A61N1/36071 ,  A61N1/361

摘要： A neural prosthetic device is provided that includes one or more ion-selective membranes enabling electrically-controlled local modulation of ion concentrations around a nerve so as to achieve different excitability states of the nerve for electrical stimulation or inhibition of nerve signal propagation.

摘要翻译： 提供神经假体装置，其包括一个或多个离子选择膜，其能够对神经周围的离子浓度进行电控局部调制，以实现用于电刺激或抑制神经信号传播的神经的不同兴奋性状态。

公开(公告)号：US08000797B1

公开(公告)日：2011-08-16

申请号：US11449056

申请日：2006-06-07

申请人： Rahul Sarpeshkar ,  Michael A. Faltys ,  Ji-Jon Sit

发明人： Rahul Sarpeshkar ,  Michael A. Faltys ,  Ji-Jon Sit

IPC分类号： A61N1/00 ,  A61B5/04

CPC分类号： A61N1/36185 ,  A61N1/36036

摘要： The present invention provides methods and systems for selecting one or more channels of a neural implant to stimulate. A channel selection unit is configured to asynchronously and stochastically select the winning channel or channels based, in part, on the richness of the input sensory environment. Thereafter, the channel selection unit reduces the likelihood that the selected channel or channels will be selected again for a period of time.

摘要翻译： 本发明提供了用于选择刺激的神经植入物的一个或多个通道的方法和系统。 频道选择单元被配置为部分地基于输入感觉环境的丰富性来异步地并且随机地选择获胜频道或频道。 此后，频道选择单元减少所选择的频道或频道将被再次选择一段时间的可能性。

公开(公告)号：US07787642B2

公开(公告)日：2010-08-31

申请号：US10892932

申请日：2004-07-16

申请人： Michael W. Baker ,  Micah O'Halloran ,  Rahul Sarpeshkar

发明人： Michael W. Baker ,  Micah O'Halloran ,  Rahul Sarpeshkar

IPC分类号： H04R3/00

CPC分类号： H03F3/45475 ,  A61N1/36036 ,  H03F1/223 ,  H03F1/301 ,  H03F1/342 ,  H03F3/185 ,  H03F2200/462 ,  H03F2203/45138 ,  H04R3/00 ,  H04R25/00 ,  H04R2410/00

摘要： A low power high dynamic range microphone amplification system is disclosed. The system includes a current sensing amplifier for receiving an input current signal representative of auditory information and for providing an amplifier output signal. The current sensing amplifier includes a DC bias network that includes a cascode filter.

摘要翻译： 公开了一种低功率高动态范围麦克风放大系统。 该系统包括用于接收代表听觉信息的输入电流信号并用于提供放大器输出信号的电流感测放大器。 电流感测放大器包括包括共源共栅滤波器的DC偏置网络。