Bottomley, US
Andrew M. Bottomley, San Diego, CA US
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20090252042 | Low Power Multiple Channel Mixing Architecture For Detecting Wake-Up Signals and Related Falsing Protection Algorithm - A low power multiple channel receiver mixing architecture for detecting wake-up signals over multiple communication channles in sniff processing performed in an implantable medical device (IMD). The architecture includes a direct conversion real receiver configured to scan a selected center channel and a Weaver receiver configured in parallel to the direct conversion real receiver to simultaneously scan side channels, together simultaneously detecting whether a wake-up signal is being received over the center and side channels with minimal power consumption. The architecture further utilizes a falsing protection algorithm that reduces power consumption during sniff operations by inhibiting the sniffing of channels likely to provide a false indication of a wake-up signal based the presence of unwanted signals on those channels. The falsing protection algorithm restricts those channels from sniff processing likely to provide a false indication of a wake-up signal, such that sniff processing can aborted, prevented, limited or otherwise altered to conserve power consumption. | 10-08-2009 |
20090323865 | Method and Apparatus for Low Power Simultaneous Frequency, Automatic Gain Control and Timing Acquisition in Radio Receivers - A method and apparatus are provided for low power simultaneous frequency, automatic gain control and timing acquisition in a low power radio receiver. A baseband signal received is split into a limited signal having limited data and a non-limited signal. The limited signal is fed through a limited phase-shift keying (PSK) correlation path in which a PSK correlator operating on the limited signal simultaneously determines coarse frequency estimations, timing estimations, and packet synchronization detection. The non-limited signal is fed through an automatic gain control path where automatic gain control is performed on the non-limited signal simultaneously with the coarse frequency and timing estimations and packet synchronization detection performed by the PSK correlator. By operating the PSK correlator on limited data from the received baseband signal and through a separate path from the automatic gain control, substantial power savings are achieved without degrading performance since the preamble time is significantly reduced. | 12-31-2009 |
Andy Bottomley, San Diego, CA US
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20150071151 | MULTI-CHANNEL LOW POWER WAKE-UP SYSTEM - A wake-up system includes an instigator for transmitting a wake-up message from a primary node to a receiver at a secondary node. The instigator sends a wake-up on either first RF channel or a second RF channel having respective frequencies such that the second RF channel is an image of the first RF channel at a local oscillator frequency of the receiver. The receiver includes an RF filter that passes both the image and non-image channels, a frequency generator for generating a local oscillator signal at the local oscillator frequency, and a mixer for mixing the filtered modulated RF signal with said local oscillator signal to generate a modulated intermediate frequency (IF) signal. The receiver monitors both the image and non-image channels simultaneously for a valid wake-up message. A wake-up message detector indicates a wake-up condition in response to the reception of a valid wake-up message. | 03-12-2015 |
Gregory Bottomley, Cary, NC US
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20100027590 | MODIFIED SIR VALUES FOR FAST POWER CONTROL - The present invention relates to a receiver comprising a fast power control unit, said fast power control unit being arranged to continuously control a quality measure of a radio channel. The receiver is characterized in that the quality measure is a modified Signal to Interference plus noise ratio (SIR) in which the influence from self interference has been removed. The invention further relates to a method for continuously controlling a quality measure of a radio channel, wherein a modified Signal to Interference plus noise ratio (SIR) is continuously determined in which the influence from self interference has been removed. | 02-04-2010 |
20100254446 | RECEIVER AND METHOD FOR TWO-STAGE EQUALIZATION WITH SEQUENTIAL SEARCH - A receiver and method are described herein that address inter-symbol interference in a received signal by using a two-stage equalizer which includes a first demodulation stage that processes the received signal and produces initial symbol decisions, and a non-linear equalization second stage that uses the received signal to perform a sequential search in an attempt to improve upon the initial symbol decisions where if able to improve upon the initial symbol decisions then an output sequence is obtained from the sequential search and if not able to improve upon the sequence metric threshold then the output sequence is the initial symbol decisions. | 10-07-2010 |
20130077670 | IMPAIRMENT COVARIANCE AND COMBINING WEIGHT UPDATES DURING ITERATIVE TURBO INTERFERENCE CANCELLATION RECEPTION - In a receive node of a wireless network, an iterative multi-user multi-stage interference cancellation receiver is used. After each stage of interference cancellation, interference characteristics change. An adaptive strategy is used in which after each stage of interference cancellation, impairment covariance is parametrically updated and combining weights of the receiver are adapted to reflect the updated impairment covariance. | 03-28-2013 |
Paul Bottomley, Columbia, MD US
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20090171421 | MRI-SAFE HIGH IMPEDANCE LEAD SYSTEMS - Some embodiments are directed to MRI/RF compatible medical interventional devices. A plurality of spaced apart high impedance circuit segments are configured to have a high impedance at a high range of radiofrequencies and a low impedance at a low range of frequencies The high impedance circuit segments may comprise co-wound coiled inductors and can reduce, block or inhibit RJ-transmission along the lead system ( | 07-02-2009 |
20120071953 | MRI-SAFE HIGH IMPEDANCE LEAD SYSTEMS - Some embodiments are directed to MRI/RF compatible medical interventional devices. A plurality of spaced apart high impedance circuit segments are configured to have a high impedance at a high range of radiofrequencies and a low impedance at a low range of frequencies. The high impedance circuit segments may comprise co-wound coiled inductors and can reduce, block or inhibit RJ-transmission along the lead system ( | 03-22-2012 |
20130245741 | MRI-SAFE HIGH IMPEDANCE LEAD SYSTEMS - Some embodiments are directed to MRI/RF compatible medical interventional devices. A plurality of spaced apart high impedance circuit segments are configured to have a high Impedance at a high range of radiofrequencies and a low impedance at a low range of frequencies. The high impedance circuit segments may comprise co-wound coiled inductors and can reduce, block or inhibit RJ-transmission along the lead system ( | 09-19-2013 |
Paul Bottomley, Baltimore, MD US
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20150257675 | METHODS AND APPARATUS FOR ACCELERATED, MOTION-CORRECTED HIGH-RESOLUTION MRI EMPLOYING INTERNAL DETECTORS OR MRI ENDOSCOPY - A method of internal MRI employing at least one active internal MRI detector located within a sample of interest. The method includes applying an MRI pulse sequence to the sample of interest. The MRI pulse sequence includes spatial encoding projections. The method further includes receiving MRI signals at the active internal MRI detector and reconstructing at least one MRI image from the MRI signals using an error minimizing algorithm. The MRI pulse sequence provides an increase in an acquisition speed when reconstructing the at least one MRI image by sparsely under-sampling an image k-space in at least one dimension. | 09-17-2015 |
Paul A. Bottomley, Columbia, MD US
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20080243218 | MRI AND RF COMPATIBLE LEADS AND RELATED METHODS OF OPERATING AND FABRICATING LEADS - RF/MRI compatible leads include at least one conductor that turns back on itself at least twice in a lengthwise direction, and can turn back on itself at least twice at multiple locations along its length. The at least one electrical lead can be configured so that the lead heats local tissue less than about 10 degrees Celsius (typically about 5 degrees Celsius or less) or does not heat local tissue when a patient is exposed to target RF frequencies at a peak input SAR of at least about 4 W/kg and/or a whole body average SAR of at least about 2 W/kg. Related devices and methods of fabricating leads are also described. | 10-02-2008 |
20080262584 | METHODS AND APPARATUS FOR FABRICATING LEADS WITH CONDUCTORS AND RELATED FLEXIBLE LEAD CONFIGURATIONS - MRI/RF compatible leads include at least one conductor, a respective conductor having at least one segment with a multi-layer stacked coil configuration. The lead can be configured so that the lead heats local tissue less than about 10 degrees Celsius (typically about 5 degrees Celsius or less) or does not heat local tissue when a patient is exposed to target RF frequencies at a peak input SAR of at least about 4 W/kg and/or a whole body average SAR of at least about 2 W/kg. Related leads and methods of fabricating leads are also described. | 10-23-2008 |
20090015256 | Optimized MRI strip array detectors and apparatus, systems and methods related thereto - Featured is a device for NMR or MRI signals from excited nuclei as well as related apparatus, systems and methods. The device includes a strip array antenna including one or more conductor and N reactive tuning components, where N is an integer ≧1 at least one of the N reactive components is electrically coupled to each of the one or more conductors as well as to ground/virtual ground. The apparent electrical length of the conductors is tuned with the reactive tuning components so it is equal to be about nλ/4, where n is an integer ≧1 and λ is the wavelength of the signal to be detected. The length of the strip also is such as to be substantially in the approximate range of 1.3 times the depth of interest. The strip conductors are also combined with loop coils to form quadrature detectors. | 01-15-2009 |
20100274252 | VERTEBRAL BODY REDUCTION INSTRUMENT AND METHODS RELATED THERETO - Featured is a reduction instrument being configured and arranged to allow correction of vertebral translation and applying distraction across a segment in an independent fashion. Such a reduction instrument embodies one or more identical modules that are configured as needed for correcting the deformity. In more particular embodiments, each of the one or more modules has two degrees of freedom (DOF) with uncoupled orthogonal translations. Such a reduction instrument allows the reorientation of the vertebral segment as needed via uncoupled orthogonal translations. Such a reduction instrument also is usable in combination with a plurality of vertebral anchors, such vertebral anchors being any such vertebral anchors as are know to those skilled in the art (e.g., conventional spinal pedicle screw instrumentation) or hereinafter developed so as to form a spinal implant system. Also featured are treatment methods utilizing such a reduction instrument. | 10-28-2010 |
20110037468 | OPTIMIZED MRI STRIP ARRAY DETECTORS AND APPARATUS, SYSTEMS AND METHODS RELATED THERETO - Featured is a device for NMR or MRI signals from excited nuclei as well as related apparatus, systems and methods. The device includes a strip array antenna including one or more conductor and N reactive tuning components, where N is an integer≧1 at least one of the N reactive components is electrically coupled to each of the one or more conductors as well as to ground/virtual ground. The apparent electrical length of the conductors is tuned with the reactive tuning components so it is equal to be about nλ/4, where n is an integer≧1 and λ is the wavelength of the signal to be detected. The length of the strip also is such as to be substantially in the approximate range of 1.3 times the depth of interest. The strip conductors are also combined with loop coils to form quadrature detectors. | 02-17-2011 |
20110148411 | SAR DOSIMETER FOR RF POWER DEPOSITION IN MRI AND METHODS AND SYSTEMS RELATED THERETO - Featured is a dosimeter device that measures SAR deposited by RF power deposition during MRI of a specimen. Such a dosimeter device includes a transducer that is configured to present a load to the MRI scanner in which the transducer is located and to provide an output representative of signals induced in the transducer. The transducer also is configured so that the presented load is substantially equivalent to another load which would be presented by the specimen during MRI of the specimen. Such a transducer also is configured so as to generate an MRI signal that is sufficient to allow the MRI scanner to adjust the RF power to a value substantially equal to that of the specimen. Also featured are methods for measuring SAR deposited by RF power deposition and apparatuses or system embodying such a dosimeter device. | 06-23-2011 |
Paul A. Bottomley, Baltimore, MD US
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20130141096 | SYSTEMS AND METHODS FOR MEASURING NUCLEAR MAGNETIC RESONANCE SPIN-LATTICE RELAXATION TIME T1 AND SPIN-SPIN RELAXATION TIME T2 - A system for measuring nuclear magnetic resonance spin-lattice relaxation time T | 06-06-2013 |
20140015529 | SYSTEM AND METHOD OF PERFORMING MAGNETIC RESONANCE SPECTROSCOPIC IMAGING - A method of performing spatially localized magnetic resonance spectroscopy includes receiving a magnetic resonance image of an object; identifying a plurality C of compartments that generate magnetic resonance spectroscopy signals in the object including at least one compartment of interest; segmenting in at least one spatial dimension the magnetic resonance image of the object into the C compartments; acquiring magnetic resonance spectroscopy signals from the compartments by applying a plurality of M′ phase encodings applied in the at least one spatial dimension, wherein M′≧C; calculating a spatially localized magnetic resonance chemical shift spectrum from the at least one compartment of interest; and rendering a spatially localized magnetic resonance spectrum that is substantially equal to a spatial average of magnetic resonance chemical shift spectra from the at least one compartment of interest. A magnetic resonance spectroscopy and imaging system is configured to perform the above method. | 01-16-2014 |
20140015547 | HIGH DYNAMIC RANGE RF POWER MONITOR - A device with at least one channel for measuring high dynamic range, radio frequency (RF) power levels over broad-ranging duty cycles includes a power sensor circuit comprising at least one logarithmic amplifier; at least one directional RF coupler electrically connected to the at least one power sensor; at least one RF attenuator electrically connected to the at least one RF coupler; and at least one sampling circuit electrically connected to the at least one RF attenuator and the at least one RF coupler. The at least one sampling circuit performs analog-to-digital conversion of electrical signals received to provide digitals signals for measuring the RF power level in the at least one channel. | 01-16-2014 |
Todd Bottomley, Chesterfield, NH US
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20120045300 | HIGH SPEED SUBSTRATE ALIGNER APPARATUS - In accordance to an exemplary embodiment of the disclosed embodiments, a substrate aligner apparatus is presented, the substrate aligner apparatus having a frame adapted to allow a substrate transporter to transport a substrate to and from the aligner apparatus, an inverted chuck capable of holding the substrate and movably connected to the frame by a chuck driveshaft engaged to the inverted chuck for moving the inverted chuck relative to the frame and effecting alignment of the substrate, a sensing device located between the chuck and chuck driveshaft for detecting a position determining feature of the substrate, and a substrate transfer mechanism movably connected to the frame and located inside the frame below the inverted chuck for moving the substrate from the inverted chuck to the substrate transporter. | 02-23-2012 |
20140147234 | HIGH SPEED SUBSTRATE ALIGNER APPARATUS - A substrate aligner providing minimal substrate transporter extend and retract motions to quickly align substrate without back side damage while increasing the throughput of substrate processing. In one embodiment, the aligner having an inverted chuck connected to a frame with a substrate transfer system capable of transferring substrate from chuck to transporter without rotationally repositioning substrate. The inverted chuck eliminates aligner obstruction of substrate fiducials and along with the transfer system, allows transporter to remain within the frame during alignment. In another embodiment, the aligner has a rotatable sensor head connected to a frame and a substrate support with transparent rest pads for supporting the substrate during alignment so transporter can remain within the frame during alignment. Substrate alignment is performed independent of fiducial placement on support pads. In other embodiments the substrate support employs a buffer system for buffering substrate inside the apparatus allowing for fast swapping of substrates. | 05-29-2014 |
Todd E. Bottomley, Chesterfield, NH US
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20130247442 | Swiveling Tip for a Fishing Rod - A swiveling tip for a fishing rod includes a housing with a barrel positioned therein and a roller. The housing includes a first bore for receiving the barrel and a second bore for receiving a fishing rod. The barrel is capable of rotating 360° around a longitudinal axis of the second bore. The barrel has a guiding assembly at a distal end thereof and nose member, which together with the roller, guides and receives a fishing line therebetween. | 09-26-2013 |