Patents Assigned to Clara Inc.
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Patent number: 8581587Abstract: Technologies applicable to SNMR pulse sequence phase cycling are disclosed, including SNMR acquisition apparatus and methods, SNMR processing apparatus and methods, and combinations thereof. SNMR acquisition may include transmitting two or more SNMR pulse sequences and applying a phase shift to a pulse in at least one of the pulse sequences, according to any of a variety of phase cycling techniques. SNMR processing may include combining SNMR from a plurality of pulse sequences comprising pulses of different phases, so that desired signals are preserved and undesired signals are canceled.Type: GrantFiled: May 10, 2011Date of Patent: November 12, 2013Assignee: Vista Clara Inc.Inventors: David O. Walsh, Elliot D. Grunewald
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Publication number: 20130293228Abstract: Technologies applicable to NMR detection of water and hydrocarbons during induced alteration: processes are disclosed. NMR measurements may be used to monitor properties of subsurface fluids within a subsurface formation. NMR measurement devices may be deployed proximal to or within a subsurface formation that contains hydrocarbons. Multiple NMR measurements may be performed during an induced alteration process applied, to the subsurface formation to determine properties of the subsurface formation or fluid as the induced alteration process progresses. Changes in properties of the subsurface formation or fluid may be determined and may be used to determine efficacy of optimize, or otherwise modify the induced alteration process.Type: ApplicationFiled: May 1, 2013Publication date: November 7, 2013Applicant: VISTA CLARA INC.Inventors: DAVID O. WALSH, ELLIOT D. GRUNEWALD
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Publication number: 20130193969Abstract: Technologies including NMR relaxation time estimation methods and corresponding apparatus are disclosed. Example techniques may generate two or more alternating current transmit pulses with arbitrary amplitudes, time delays, and relative phases; apply a surface NMR acquisition scheme in which initial preparatory pulses, the properties of which may be fixed across a set of multiple acquisition sequence, are transmitted at the start of each acquisition sequence and are followed by one or more depth sensitive pulses, the pulse moments of which are varied across the set of multiple acquisition sequences; and apply processing techniques in which recorded NMR response data are used to estimate NMR properties and the relaxation times T1 and T2* as a function of position as well as one-dimensional and two-dimension distributions of T1 versus T2* as a function of subsurface position.Type: ApplicationFiled: January 25, 2013Publication date: August 1, 2013Applicant: VISTA CLARA INC.Inventor: VISTA CLARA INC.
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Publication number: 20130187647Abstract: Technologies including NMR logging apparatus and methods are disclosed. Example NMR logging apparatus may include surface instrumentation and one or more downhole probes configured to fit within an earth borehole. The surface instrumentation may comprise a power amplifier, which may be coupled to the downhole probes via one or more transmission lines, and a controller configured to cause the power amplifier to generate a NMR activating pulse or sequence of pulses. Impedance matching means may be configured to match an output impedance of the power amplifier through a transmission line to a load impedance of a downhole probe. Methods may include deploying the various elements of disclosed NMR logging apparatus and using the apparatus to perform NMR measurements.Type: ApplicationFiled: January 23, 2012Publication date: July 25, 2013Applicant: VISTA CLARA, INC.Inventors: DAVID O. WALSH, PETER TURNER
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Patent number: 8451004Abstract: A multicoil NMR detection and imaging apparatus allows multicoil NMR detection and imaging to be performed efficiently at low operating frequencies. The apparatus comprises an AC voltage generator, a transmit switching circuit, a coil switching network, an array of two or more detection coils, a set of receive switching circuits with one switching circuit for each detection coil, and a set of preamplifier circuits with input impedance substantially greater than the impedance of each respective detection coil at the intended operating frequency. The AC generator produces an alternating current waveform that is routed through one of more detection coils during transmit mode while the preamplifier circuits are isolated from the detection coil(s). During receive mode the AC generator is isolated from the detection coils to prevent noise from the transmitter from degrading the quality of received signals.Type: GrantFiled: April 20, 2011Date of Patent: May 28, 2013Assignee: Vista Clara Inc.Inventor: David O. Walsh
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Publication number: 20120286779Abstract: Technologies applicable to SNMR pulse sequence phase cycling are disclosed, including SNMR acquisition apparatus and methods, SNMR processing apparatus and methods, and combinations thereof. SNMR acquisition may include transmitting two or more SNMR pulse sequences and applying a phase shift to a pulse in at least one of the pulse sequences, according to any of a variety of phase cycling techniques. SNMR processing may include combining SNMR from a plurality of pulse sequences comprising pulses of different phases, so that desired signals are preserved and undesired signals are canceled.Type: ApplicationFiled: May 10, 2011Publication date: November 15, 2012Applicant: VISTA CLARA, INC.Inventors: DAVID O. WALSH, ELLIOT D. GRUNEWALD
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Publication number: 20110210731Abstract: A multicoil NMR detection and imaging apparatus allows multicoil NMR detection and imaging to be performed efficiently at low operating frequencies. The apparatus comprises an AC voltage generator, a transmit switching circuit, a coil switching network, an array of two or more detection coils, a set of receive switching circuits with one switching circuit for each detection coil, and a set of preamplifier circuits with input impedance substantially greater than the impedance of each respective detection coil at the intended operating frequency. The AC generator produces an alternating current waveform that is routed through one of more detection coils during transmit mode while the preamplifier circuits are isolated from the detection coil(s). During receive mode the AC generator is isolated from the detection coils to prevent noise from the transmitter from degrading the quality of received signals.Type: ApplicationFiled: April 20, 2011Publication date: September 1, 2011Applicant: VISTA CLARA, INC.Inventor: DAVID O. WALSH
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Patent number: 7986143Abstract: A multicoil NMR detection and imaging apparatus allows multicoil NMR detection and imaging to be performed efficiently at low operating frequencies. The apparatus comprises an AC voltage generator, a transmit switching circuit, a coil switching network, an array of two or more detection coils, a set of receive switching circuits with one switching circuit for each detection coil, and a set of preamplifier circuits with input impedance substantially greater than the impedance of each respective detection coil at the intended operating frequency. The AC generator produces an alternating current waveform that is routed through one of more detection coils during transmit mode while the preamplifier circuits are isolated from the detection coil(s). During receive mode the AC generator is isolated from the detection coils to prevent noise from the transmitter from degrading the quality of received signals.Type: GrantFiled: November 10, 2008Date of Patent: July 26, 2011Assignee: Vista Clara Inc.Inventor: David O. Walsh
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Publication number: 20110109311Abstract: Technologies applicable to noise canceling in-situ NMR detection and imaging are disclosed. An example noise canceling in-situ NMR detection apparatus may comprise one or more of a static magnetic field generator, an alternating magnetic field generator, an in-situ NMR detection device, an auxiliary noise detection device, and a computer.Type: ApplicationFiled: October 28, 2010Publication date: May 12, 2011Applicant: VISTA CLARA, INC.Inventor: DAVID O. WALSH
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Publication number: 20110095758Abstract: A multicoil NMR detection and imaging apparatus allows multicoil NMR detection and imaging to be performed efficiently at low operating frequencies. The apparatus comprises an AC voltage generator, a transmit switching circuit, a coil switching network, an array of two or more detection coils, a set of receive switching circuits with one switching circuit for each detection coil, and a set of preamplifier circuits with input impedance substantially greater than the impedance of each respective detection coil at the intended operating frequency. The AC generator produces an alternating current waveform that is routed through one of more detection coils during transmit mode while the preamplifier circuits are isolated from the detection coil(s). During receive mode the AC generator is isolated from the detection coils to prevent noise from the transmitter from degrading the quality of received signals.Type: ApplicationFiled: November 10, 2008Publication date: April 28, 2011Applicant: VISTA CLARA, INC.Inventor: David O. Walsh
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Patent number: 7650077Abstract: An optical transceiver module includes an optical-to-electrical converter configured to convert a first optical signal to a first electric signal, a first amplifier configured to amplify the first electric signal, a bandwidth controller coupled to the first amplifier, configured to control the frequency response characteristics of the amplification of the first amplifier to produce a first amplified electric signal, a driver circuit configured to receive a second electric signal and to produce a second amplified electric signal in response to the second electric signal and an optical feedback signal, an electrical-to-optical converter coupled to the micro-controller and configured to convert the second amplified electrical signal to a second optical signal, and a photo diode configured to detect the second optical signal and to produce the optical feedback signal to be received by the driver circuit.Type: GrantFiled: April 3, 2007Date of Patent: January 19, 2010Assignee: Source Photonics Santa Clara, Inc.Inventors: Rangchen Yu, Yuanjun Huang, Mingshou He, Bin Wei, Jiang Tian
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Publication number: 20090276169Abstract: Methods and systems for a universally applicable, linear, signal processing framework for optimal detection, localization, and feature extraction of dipolar magnetic and electromagnetic (EM) targets. Such methods and systems provide the ability to, for example, simultaneously and optimally solve the problems of detection, localization and estimation of the dipole vector or target response matrix; be applicable to different types of magnetic or EMI sensor system; and be applicable to arbitrary combinations of sensor locations and orientations, and arbitrary spatial sampling. Such functionality is provided, in various aspects of the disclosure, with a quadrature matched filter algorithm for detecting and imaging magnetic dipoles to the more complex realm of single- and multi-channel EMI sensors.Type: ApplicationFiled: April 3, 2009Publication date: November 5, 2009Applicant: VISTA CLARA, INC.Inventors: David O. Walsh, William F. Avrin
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Patent number: 7466128Abstract: A multicoil NMR data acquisition apparatus and processing method for performing three-dimensional magnetic resonance imaging in a static magnetic field without the application of controlled static magnetic field gradients. A preferred application relates specifically to the detection and localization of groundwater using the Earth's magnetic field. Multicoil arrays are used in both transmit and receive modes, and coherent data processing algorithms applied to the data to generate three-dimensional NMR spin density estimates. Disclosed are methods for acquiring NMR data using an array of at least two transmit and receive coils, and for processing such multicoil data to estimate the three-dimensional NMR spin density distributions.Type: GrantFiled: January 9, 2006Date of Patent: December 16, 2008Assignee: Vista Clara, Inc.Inventor: David O. Walsh
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Patent number: 7329831Abstract: Improved systems and methods for laser trimming resistors printed on a substrate layer are provided. An exemplary embodiment measures a resistance value for each annular resistor and sorts the annular resistors into one or more bins based on the measured resistance values and target resistance values associated with each resistor. A laser trim file may then be assigned to each bin based on a predictive trim formulation, where each laser trim file defines a set of configuration parameters for a laser drill to conform each resistor with their respective target value. The laser drill uses the laser trim files to trim the resistors within each bin in accordance with the laser trim file assigned to that bin.Type: GrantFiled: March 29, 2005Date of Patent: February 12, 2008Assignee: HADCO Santa Clara, Inc.Inventors: Nicholas Biunno, Atul Patel, Ken Ogle, George Dudnikov
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Patent number: 7297896Abstract: Improved systems and methods for laser trimming resistors are provided. An exemplary embodiment measures a resistance value for each resistor and sorts the resistors into one or more bins based on the measured resistance values and target resistance values associated with each resistor. A laser trim file may then be assigned to each bin based on a predictive trim formulation, where each laser trim file defines a set of configuration parameters for a laser drill to conform each resistor with their respective target value. The laser drill uses the laser trim files to trim the resistors within each bin in accordance with the laser trim file assigned to that bin.Type: GrantFiled: October 19, 2005Date of Patent: November 20, 2007Assignee: HADCO Santa Clara, Inc.Inventors: Nicholas Biunno, Atul Patel, Ken Ogle, George Dudnikov
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Publication number: 20070155736Abstract: This application describes fluorinated (+)PHNO and analogs thereof, including radiolabeled analogs, compositions comprising these compounds and methods of using these compounds, for example, for identifying dopamine supersensitivity.Type: ApplicationFiled: November 10, 2006Publication date: July 5, 2007Applicant: Clara Inc.Inventor: Philip Seeman
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Patent number: 6972391Abstract: Improved systems and methods for laser trimming annular resistors printed on a circuit board are provided. An exemplary embodiment measures a resistance value for each annular resistor and sorts the annular resistors into one or more bins based on the measured resistance values and target resistance values associated with each annular resistor. A laser trim file may then be assigned to each bin based on a predictive trim formulation, where each laser trim file defines a set of configuration parameters for a laser drill to conform each annular resistor with their respective target value. The laser drill uses laser trim files to trim the annular resistors within each bin in accordance with a laser trim file assigned to that bin.Type: GrantFiled: November 21, 2002Date of Patent: December 6, 2005Assignee: HADCO Santa Clara, Inc.Inventors: Nicholas Biunno, Atul Patel, Ken Ogle, George Dudnikov
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Patent number: 6282782Abstract: A method of forming a subassembly for use in a printed circuit board is described. This method includes providing a subassembly including a circuit board layer laminated to two sheets of conductive material with two intermediate sheets of prepreg material, forming a via in the assembly, plating the via, filling the via with a plug material in a volatile solvent, evaporating the volatile solvent, and curing the plug material. Also described is a method of forming a partially filled via in a circuit board layer and a method of forming a thermally conductive plug in a circuit board layer for the transfer of thermal energy from one surface of the circuit board to the other.Type: GrantFiled: September 2, 1999Date of Patent: September 4, 2001Assignee: Hadco Santa Clara, Inc.Inventors: Nicholas Biunno, Scott Bryan, Mason Hu
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Patent number: D594455Type: GrantFiled: November 27, 2006Date of Patent: June 16, 2009Assignee: Source Photonics Santa Clara, Inc.Inventors: Zhong Yang, Zili Wang, Linhua Zhang, Dongsheng Li
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Patent number: RE43264Abstract: A multicoil NMR data acquisition apparatus and processing method for performing three-dimensional magnetic resonance imaging in a static magnetic field without the application of controlled static magnetic field gradients. A preferred application relates specifically to the detection and localization of groundwater using the Earth's magnetic field. Multicoil arrays are used in both transmit and receive modes. and coherent data processing algorithms applied to the data to generate three-dimensional NMR spin density estimates. Disclosed are methods for acquiring NMR data using an array of at least two transmit and receive coils, and for processing such multicoil data to estimate the three-dimensional NMR spin density distributions.Type: GrantFiled: March 1, 2010Date of Patent: March 27, 2012Assignee: Vista Clara Inc.Inventor: David O. Walsh