公开(公告)号：US10261253B1

公开(公告)日：2019-04-16

申请号：US15044104

申请日：2016-02-15

申请人： Joannes M. Costa ,  Jay A. Chesavage

发明人： Joannes M. Costa ,  Jay A. Chesavage

IPC分类号： G02B6/12 ,  G02B6/125 ,  G02B6/136 ,  G02B6/132 ,  G02B6/28

摘要： An optical power combiner, or splitter, is formed from a first substrate and a second substrate, each substrate having a substantially planar joining surface, at least one substrate having a plurality of waveguide channels formed such as by etching, the plurality of waveguide channels coupled to a waveguide channel combiner having a plurality of waveguide channel apertures, the optical combiner having a single channel aperture on an opposite side from the plurality of waveguide channel apertures, the single channel aperture coupled to a single waveguide channel of zero or greater length, and to an edge opposite the plurality of waveguide channels.

公开(公告)号：US09110259B1

公开(公告)日：2015-08-18

申请号：US14616488

申请日：2015-02-06

申请人： Richard J. Black ,  Joannes M. Costa ,  Behzad Moslehi ,  Vahid Sotoudeh ,  Jay A. Chesavage

发明人： Richard J. Black ,  Joannes M. Costa ,  Behzad Moslehi ,  Vahid Sotoudeh ,  Jay A. Chesavage

IPC分类号： G02B6/28 ,  G02B6/34 ,  G02B6/42 ,  G02B6/293 ,  G02B6/12 ,  G02B6/02 ,  G02B6/124

CPC分类号： G02B6/2938 ,  G01D5/35316 ,  G01D5/35387 ,  G01J3/0218 ,  G01J3/1895 ,  G01J3/36 ,  G02B6/02057 ,  G02B6/02085 ,  G02B6/02138 ,  G02B6/022 ,  G02B6/12007 ,  G02B6/124 ,  G02B6/29383 ,  G02B6/29395 ,  H04J14/02

摘要： A plurality of AWG filters with aliasing responses are selected such that the wavelength range of a fundamental response of the AWG filters results in the aliased range of AWG filters to be adjacent to a fundamental range of the AWG filters. A plurality of optical sources is provided sufficient to cover each fundamental wavelength range and each alias wavelength range of the AWG filters. When a single one of the optical sources is enabled, reflected optical energy from a series string of FBGs coupled to the optical source is applied to the plurality of AWG filters, and the AWG output in combination with the wavelength range of the optical source is used to discriminate reflected wavelength from the FBG sensors.

摘要翻译： 选择具有混叠响应的多个AWG滤波器，使得AWG滤波器的基波响应的波长范围导致AWG滤波器的混叠范围与AWG滤波器的基本范围相邻。 多个光源被提供足以覆盖AWG滤波器的每个基本波长范围和每个别名波长范围。 当启用单个光源时，耦合到光源的串联FBG的串联反射光能被施加到多个AWG滤波器，并且使用结合光源的波长范围的AWG输出 以区分来自FBG传感器的反射波长。

公开(公告)号：US06366380B1

公开(公告)日：2002-04-02

申请号：US09249685

申请日：1999-02-12

申请人： Jay A. Chesavage

发明人： Jay A. Chesavage

IPC分类号： H04B1000

CPC分类号： H04B10/40 ,  G02B6/4246 ,  G02B6/4277 ,  G02B6/4292

摘要： A transceiver for the transmission and reception of high speed optical signals contains a detuning structure which reduces the gain for quarter wave radiation of Electro Magnetic Radiation (EMI). A conductive housing couples light energy from a source or a detector to an external fiber having a metallic ferrule. The conductive housing also is referenced to the chassis enclosure of the transceiver thereby attenuating the quarter wave radiator.

摘要翻译： 用于发送和接收高速光信号的收发器包含一个失谐结构，其降低了电磁辐射（EMI）的四分之一波长辐射的增益。 导电壳体将来自源或检测器的光能耦合到具有金属套圈的外部光纤。 导电外壳还参考收发器的底盘外壳，从而衰减四分之一波长的散热器。

公开(公告)号：US06757350B1

公开(公告)日：2004-06-29

申请号：US09332204

申请日：1999-06-12

申请人： Jay A. Chesavage

发明人： Jay A. Chesavage

IPC分类号： H03D324

CPC分类号： G06F11/1604 ,  G06F11/1608 ,  H03L7/07 ,  H03L7/087 ,  H03L7/093

摘要： A system for the generation and distribution a plurality of coherently phased system clocks comprises a local clock generator and a plurality of remote clock generators. Each clock generator has a local input and a plurality of remote inputs coupled to a plurality of phase detectors, a cost function coupled to each phase detector and producing a control output, and the control output coupled to a voltage controlled oscillator and producing a local clock output, which is distributed to each local and remote clock generator. The cost function comprises a linear or non-linear combination of phase error and offset. A clock selection circuit comprises a control input which changes a propagation time away from the coherently phased edges of the system clock, thereby selecting a system clock in a glitch-free manner.

摘要翻译： 用于生成和分发多个相干相位系统时钟的系统包括本地时钟发生器和多个远程时钟发生器。 每个时钟发生器具有耦合到多个相位检测器的本地输入和多个远程输入，耦合到每个相位检测器并产生控制输出的成本函数，以及耦合到压控振荡器并产生本地时钟的控制输出 输出，分配给每个本地和远程时钟发生器。 成本函数包括相位误差和偏移的线性或非线性组合。 时钟选择电路包括控制输入，该控制输入改变远离系统时钟的相干相位边缘的传播时间，从而以无毛刺的方式选择系统时钟。

公开(公告)号：US10925583B1

公开(公告)日：2021-02-23

申请号：US15619544

申请日：2017-06-12

申请人： Jay A. Chesavage

发明人： Mark A. Moehring ,  Jay A. Chesavage ,  Daniel Kreindler ,  Marc Fine

IPC分类号： A61B8/08 ,  A61B8/00

摘要： An apparatus for the detection of compartment syndrome (CS) provides an ultrasound transducer which is operative to excite the ultrasound transducer with a transmit waveform having a center frequency. The ultrasound beam traverses through the compartments of interest, and reflections of signal through Rayleigh scattering are received, amplified, and mixed with a transmit clock to form a baseband quadrature signal, or alternatively, are sampled as RF. Reflections from the compartment volume front and rear fascia interfaces are examined for phase shift, after which an elasticity metric is generated indicating the likelihood of CS in the effected tissues.

公开(公告)号：US06239626B1

公开(公告)日：2001-05-29

申请号：US09479030

申请日：2000-01-07

申请人： Jay A. Chesavage

发明人： Jay A. Chesavage

IPC分类号： H03K1700

CPC分类号： G06F1/08 ,  H03L7/07

摘要： A pair of synchronized clock sources provides phase and frequency synchronous first and second clocks accompanied by first and second control signals to a clock selection circuit having a data selector comprising a first synchronizer and a second synchronizer which re-times the first and second control signals, and these re-timed outputs that are coupled to an asynchronous state machine. The asynchronous state machine changes state by logically operating on the re-timed control signals in conjunction with a state bit. This state bit is used to control the multiplexer, which achieves glitch-free switching between the first clock source and the second clock source.

摘要翻译： 一对同步时钟源将相位和频率同步的第一和第二时钟伴随着第一和第二控制信号提供给具有数据选择器的时钟选择电路，该数据选择器包括重新计时第一和第二控制信号的第一同步器和第二同步器， 以及耦合到异步状态机的这些重新定时的输出。 异步状态机通过逻辑上对定时控制信号和状态位进行操作来改变状态。 该状态位用于控制多路复用器，这实现了第一时钟源和第二时钟源之间无毛刺的切换。

公开(公告)号：US06229359B1

公开(公告)日：2001-05-08

申请号：US09476284

申请日：1999-12-31

申请人： Jay A. Chesavage

发明人： Jay A. Chesavage

IPC分类号： H03B1900

CPC分类号： H03K5/00006

摘要： A generator of high frequency signals comprises a delay element and a switching element, whereby the delay element causes a delay of &pgr;/4 radians, and the switching element is switching to produce an output at the fundamental frequency, but with enriched even harmonic content. A filter selects the desired harmonic, and passes this on as an output. Additionally, a maximizing circuit may vary the phase of the delay element to maximize the output level of the generator.

摘要翻译： 高频信号的发生器包括延迟元件和开关元件，由此延迟元件引起π/ 4弧度的延迟，并且开关元件切换以产生基本频率的输出，但是具有富集的均匀谐波含量。 滤波器选择所需的谐波，并将其作为输出。 此外，最大化电路可以改变延迟元件的相位以最大化发生器的输出电平。

公开(公告)号：US5834925A

公开(公告)日：1998-11-10

申请号：US853156

申请日：1997-05-08

申请人： Jay A. Chesavage

发明人： Jay A. Chesavage

IPC分类号： H02J1/10 ,  H02M7/00

CPC分类号： H02J1/108 ,  Y10T307/582

摘要： A plurality of power supplies are connected in parallel, each power supply isolated from the others using a non-linear isolation element such as a barrier diode. Feedback is furnished around the non-linear isolation element such that the voltage drop of the isolation element is reduced to be within the regulation range desired. The non-linear characteristic of the isolation element combined with feedback produces an output impedance which is low for high currents, and exponentially higher for low output currents for current sharing versus output offset voltage improvement.

摘要翻译： 多个电源并联连接，每个电源使用诸如阻挡二极管的非线性隔离元件与其他电源隔离。 非线性隔离元件周围提供反馈，使得隔离元件的电压降降低到所需的调节范围内。 与反馈组合的隔离元件的非线性特性产生对于高电流为低的输出阻抗，并且对于用于电流共享与输出偏移电压改善的低输出电流，输出阻抗指数更高。

公开(公告)号：US5036280A

公开(公告)日：1991-07-30

申请号：US479389

申请日：1990-02-13

申请人： Jay A. Chesavage

发明人： Jay A. Chesavage

IPC分类号： G01R33/58

CPC分类号： G01R33/58

摘要： A cylindrical tube with closed ends contains an imaging fluid and a variety of imaging structures enclosed. Included is a slice thickness structure with a hole pattern in a chevron shape where the number of imaged holes determines the slice thickness. Slice planarity is determined by a number of contiguous disks with grooved patterns set at rotated angles with respect to each other. Geometric distortion and resolution are also measured by structures contained within the enclosure. Finally, the position of the first and last slices in a multiscan series is measured for accuracy by ramp wedges placed on the end caps of the enclosure. And lastly, air is entrapped in closed cell foam so there are no unconstrained bubbles migrating in the enclosure.

摘要翻译： 具有封闭端的圆柱形管包含成像流体和封闭的各种成像结构。 包括具有人字纹形状的孔图案的切片厚度结构，其中成像孔的数量确定切片厚度。 切片平面度由具有相对于彼此旋转角度设置的带槽图案的多个连续圆盘确定。 几何失真和分辨率也由包含在外壳内的结构测量。 最后，通过放置在外壳端盖上的斜楔来测量第一和最后一个切片在多尺度系列中的位置。 最后，空气被封闭在闭孔泡沫中，所以没有无约束的气泡在外壳中迁移。