International Business Machines Corporation

Matteo Cocchini

Michael Cracraft

John G Torok

Khaalid P J McMillan

Sungjun Chun

Arushi Shahani

John S Werner

Budy D Notohardjono

Robert K Mullady

Noah B Singer

Tingdong Zhou

Zhaoqing Chen

Rohan U Mandrekar

Matthew Stephen Doyle

Arkadiy O Tsfasman

Daniel J Kearney

Edward N Cohen

Zachary Thomas Dreiss

William Louis Brodsky

Stefano Sergio Oggioni

Silvio Dragone

Wiren Dale Becker

William Santiago-Fernandez

Samuel R Connor

Stuart Brett Benefield

Kyle Indukummar Giesen

Jacob T Porter

James A Busby

Robert B Schlak

Nicholas George Danyluk

Kenneth Scea

Faezeh Gholami

Jayapreetha Natesan

Vahe A Minassian

David Clifford Long

Eric J Campbell

Timothy Jerome Tofil

Russell Alan Budd

Jeffrey N Judd

Roger Scott Krabbenhoft

Arthur J Higby

Sylvain Pharand

Kyle Wonderly

Kyle Olson

Andrew Corbett

Juan Martinez-Mantilla

Computer-implemented methods for performing enhanced resolution time-domain reflectometry are provided. Aspects include obtaining a plurality of waveforms by transmitting a first pulse on a transmission line, transmitting a second pulse on the transmission line, where the second pulse is transmitted after the first pulse by a delay, and capturing and measuring reflections of the transmitted pulses, wherein the delay corresponding to each of the plurality of waveforms is different. Aspects also include identifying a discontinuity of the transmission line based at least in part on the plurality of waveforms. Based on a determination that the transmission line includes the discontinuity, aspects include calculating third derivative curves for each of the plurality of waveforms and calculating a length of the discontinuity of the transmission line based on the third derivative curves. Aspects also include creating a notification indicating a location and the length of the discontinuity of the transmission line.

Enhanced resolution time-domain reflectometry

A device, a method, and an article of manufacture are disclosed. The device includes a first optical fiber, a second optical fiber, an electrochromic component positioned between tips of the optical fibers, and a voltage source connected to the electrochromic component. The method includes providing an electrochromic component, providing optical fibers and a voltage source, and assembling an optical switch that includes the electrochromic component, the optical fibers, and the voltage source. The voltage source is connected to the electrochromic component. The article of manufacture includes an optical switch with a voltage source connected to an electrochromic component positioned between optical fiber tips.

Electrochromic optical switch

A method, a device, and a composition are disclosed. The method includes providing a polyol blend that includes a polyol resin and an electromagnetic (EMA) additive, providing an isocyanate resin selected such that blending the isocyanate resin with the polyol blend results in an EMA spray foam. The device includes a first compartment containing an isocyanate resin and a second compartment containing a polyol blend, which includes a polyol resin and an EMA additive. The composition includes a polyurethane spray foam and an EMA additive blended into the polyurethane spray foam.

Spray foam electromagnetic interference absorber

An electronic component includes a first trace configured to transmit a first signal and a second trace configured to transmit a second signal. The electronic component further includes a layer of conductive material separated from the first and second traces by a layer of insulative material. The electronic component further includes a first vertical wall formed in direct contact with the layer of conductive material. The electronic component further includes a second vertical wall formed in direct contact with the layer of conductive material. The second vertical wall is separated from the first vertical wall by a void, and the void extends between the first trace and the second trace.

Electronic component comprising first and second conductive traces and a void formed in an insulative layer between the first and second traces providing crosstalk reduction

According to one embodiment of the present invention, a computer-implemented method for autocorrelation based security monitoring and detection is disclosed. The computer-implemented method includes determining that input signal data transmitted to a white noise generator autocorrelates with itself at one or more time lags. The computer-implemented method further includes, responsive to determining that the input signal data transmitted to the white noise generator autocorrelates with itself at one or more time lags, determining whether an autocorrelation in the input signal data transmitted to the white noise generator matches one or more predetermined input signal data patterns associated with a known event or individual.

Spectral autocorrelation based security system

A system may include a printed circuit board with a microstrip and a conductive structure surrounding the microstrip. The system may include a probe lead in communication with the conductive structure. The system may include a first contact pad electrically connected to the conductive structure and a second contact pad electrically connected to the conductive structure.

Removable contactless probe

A method may include forming a plurality of multilayer cores wherein each multilayer core comprises a sheet of cured dielectric material having a layer of metal on each side of the sheet of cured dielectric material, patterning each layer of metal in the plurality of multilayer cores to form wiring traces in each layer of metal, embedding a solder element in at least one sheet of a plurality of sheets of uncured dielectric material, wherein the solder element having a melting point temperature within a temperature range of a curing temperature of the uncured dielectric material, forming a printed circuit board by alternately stacking the plurality of multilayer cores with the plurality of sheets of uncured dielectric material between each multilayer core, laminating the stack of multilayer cores and sheets of uncured dielectric material to cause curing of the sheets of uncured dielectric material and melting of the solder element.

Buried via in a circuit board

Provided is a method for masking a sensitive signal by injecting noise into planes of a printed circuit board (PCB). The method comprises detecting, by a secondary integrated circuit (IC), a noise signal on a shared plane of a PCB that includes the secondary IC. The noise signal may be analyzed to determine the characteristics of the noise signal. A masking signal may be generated based on the characteristics. The masking signal may then be injected onto the shared plane.

Data detection mitigation in printed circuit boards

A fiber-optic switching system is provided which includes an optical fiber switch having first and second optical fiber portions and an electrically-controlled actuator. The first and second optical fiber portions are spaced apart with a gap between the portions that is sized to allow for light signal coupling between the optical fiber portions in a signal-passing state of the switch. The electrically-controlled actuator is coupled to transition the switch between the signal-passing state, where the light signal is allowed to pass between the optical fiber portions, and a signal-non-passing state, where the light signal is prevented from passing between the optical fiber portions. The electrically-controlled actuator includes an electroactive material exhibiting a physical change with change in an applied electrical field, where the physical change facilitates transitioning the optical fiber switch between the signal-passing and the signal-non-passing states.

Electrically-controlled fiber-optic switching system

A multi-layer circuit board includes a first layer including a first trace, a second layer connected to the first layer and including a second trace, and a stubless interconnect positioned through the first layer and the second layer. The stubless interconnect includes a body that is electrically insulative, and a bridge trace that is electrically conductive and connected to the body, the bridge trace extending from the first trace to the second trace to electrically connect the first trace and the second trace.

Insertable stubless interconnect

Methods, systems, and computer program products are provided for facilitating cable plugging in a network by receiving, from a scanner associated with the network, wirelessly read connector identifying information from a tag accompanying a cable connector at one end of a cable to be plugged in the network, and using, by a processor, the connector identifying information to ascertain, from a database, applicable cable rules guidance for where to properly plug the cable connector in the network. Based on ascertaining the guidance, one or more indicators associated with one or more plug locations in the network are illuminated to assist in properly plugging the cable connector in the network.

Cable plugging guidance facility for a network

An apparatus for detecting an obstruction in a conduit structure, the apparatus includes a sleeve portion, a plurality of sensor cells, a primary termination cap, and a secondary termination cap. The plurality of sensor cells coupled to the sleeve portion, wherein each sensor cell from the plurality of sensor cells is electrically coupled to the primary termination cap and the secondary termination cap. The sleeve portion configured to wrap around a conduit structure, wherein each sensor cell from the plurality of sensor cells is directed to an exterior surface of the conduit structure. The primary termination cap electrically and mechanically coupled to a first end of the sleeve portion, wherein the primary termination cap includes Wi-Fi transmitter, a primary microcontroller, and a power source connection. The secondary termination cap electrically and mechanically coupled to a second end of the sleeve portion to short the plurality of sensor cells.

Obstruction detecting sleeve for conduit structures

An apparatus and method for detecting transient voltage at an electrical component of a circuit board is provided. The apparatus including a circuit including a comparator and a latch, wherein a first input of the comparator is electrically coupled to the electrical component, and the comparator receives a threshold voltage at a second input, where the comparator outputs either a high signal or a low signal in response to both the first input and the second input, and an output of the comparator is electrically coupled to an input of the latch such that the latch outputs a high signal in response to receiving a high signal from the comparator, and an indicator electrically coupled to an output of the latch, and where the apparatus is mounted non-permanently to the circuit board to provide a non-permanent electrical coupling between the comparator and the electrical component.

Removable transient voltage detector

A system and method to automatically determine power plane shape in a printed circuit board (PCB) involve obtaining inputs. The inputs include a size and shape of the PCB, a set of sources, and a set of sinks associated with a power plane. The method also includes determining a center of charge (CoC) as a center of largest current density for the set of sources and the set of sinks, and creating a sub-shape corresponding with a path from each source of the set of sources and from each sink of the set of sinks to the CoC. The creating the sub-shape includes determining a width of a conductor in the path corresponding with each of the sub-shapes. The sub-shapes created for the set of sources and the set of sinks are combined as the power plane shape.

Automatic determination of power plane shape in printed circuit board

A system to protect signal integrity includes a circuit board having a secure portion and a non-secure portion. The secure portion includes a protected circuit operable for storing security relevant data, and a secure portion power-supply element. The non-secure portion includes an unprotected circuit and a non-secure portion power-supply element corresponding to the secure portion power-supply element. The secure portion and the non-secure portion element are separated by an isolation gap. A coupling element bridges the isolation gap between the secure portion and the non-secure portion. The coupling element is electrically connected to the secure portion power-supply element within the secure portion and electrically connected to the non-secure portion power-supply portion.

Secure signal integrity

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Long Island City, NY, United States of America

Matteo Cocchini