Lenovo (singapore) Pte. Ltd.

International Business Machines Corporation

Stephen John Flint

Jian Meng

Donald Richard Dignam

Eric Rong Ao

Alexander Philip Campbell

Michael W J Hogan

Anthony E Baker

Rong Eric Ao

Christian Savard

Lucian Rusu

Georges Turcotte

Behzad Assar

Mark Pearson

Shannon D McGale

Michael William James Hogan

Rodolfo B Salinas

A device, according to one embodiment, includes a fuse, and a resistor electrically coupled directly to the fuse in series therewith. A hybrid device, according to another embodiment, includes a fuse, and a resistor electrically coupled directly to the fuse in series therewith in a single package. A resistance of the resistor is 1 ohm or less, and is substantially temperature insensitive.

Resistor and fuse overcurrent protection device

A differential transmission line includes a positive conductor on which a positive complementary component of a differential signal is transmitted, and a negative conductor parallel to the positive conductor on which a negative complementary component of the differential signal is transmitted. A quarter wavelength differential coupler is inserted along a length of the positive and negative conductors. The quarter wavelength differential coupler has a length corresponding to a frequency of common mode noise on the positive and negative conductors. The quarter wavelength differential coupler reduces the common mode noise at the frequency as the differential signal passes through the quarter wavelength differential coupler.

Differential transmission line having quarter wavelength differential coupler to reduce common mode noise

A radio frequency (RF) noise reduction system is disclosed to include a first antenna for receiving a RF signal, a phase shifter coupled to the first antenna for generating a phase shifted RF signal, and an amplitude detector coupled to the first antenna for outputting a signal representative of an amplitude of the RF signal. Additionally, the RF noise reduction system includes a microcontroller coupled to the amplitude detector for controlling the phase shifter. Still yet, the RF noise reduction system includes a second antenna coupled to the phase shifter and being configured to transmit the phase shifted RF signal.

System for electromagnetic interference noise reduction within an enclosure

A transceiver-receiving system, such as a network switch with pluggable transceivers, is built with hardware and machine logic so that power to certain components is turned off when the pluggable transceiver is not present in its plug in slot. The machine logic for handling the turning off an on of power is present on a processor on the board to which the plug-in slot is attached. The other hardware for handling the turning on and off of the power includes a communication line from the plug-in slot to the processor, and a set of switch(es) located on the power path for the component(s) to be turned on and off according to the presence of absence of the transceiver.

Effective power management for pluggable transceiver receiving hardware in network switching systems

A breakout cable includes a data-lane module comprising a plurality of data lanes configured to send and receive a plurality of data signals, a plurality of breakout modules, and a plurality cables. Each breakout module is associated with a data lane and each cable interfaces with the data-lane module and a corresponding data lane to send and receive the plurality of signals between the data-lane module and a corresponding breakout module at a nominal 25 Gbps or a nominal 100 Gbps. In various embodiments, the data-lane module connects to a host and each of the plurality of modules connects to one or more system(s) to enable host-to-system(s) communications and system(s)-to-host communications at a nominal 100 Gbps or a nominal 400 Gbps.

Breakout cable

A circuit board has a first side and a second side opposite thereto. The board includes vias extending through the substrate from the first side to the second side, and via contact pads on the second side, each of which surrounds a corresponding via. The board includes a pair of surface mount contact pads on the second side. Each surface mount contact pad has a surface area and edges, each of which can have a shape to maximize the surface area while maintaining predetermined minimum separation distances. Each edge except one or more edges that are opposite another surface mount contact pad have a curved shape, and each edge opposite another surface mount contact pad have a linear shape. Curved edges adjacently opposite corresponding via contact pads can have curved shapes can have concave shapes, and curved edges not adjacently opposite via contact pads can have convex shapes.

Maximizing surface area of surface mount contact pads of circuit board also having via contact pads

A differential transmission line with a common mode notch filter includes adjacently arranged, repeating differential transmission line pair sections. The sections have lengths that are each equal to half of an electric wavelength of a lowest frequency of a common mode electromagnetic wave to be suppressed during transmission of an electric signal over the differential transmission line. Each section includes a pair of conductors separated from one another by a spacing. The width of each conductor and the spacing between the conductors of each section vary over the length thereof according to a same pattern such that at every point over the length of each section a differential mode impedance of the differential transmission line is identical. A common mode impedance of the differential transmission line changes periodically in accordance with the lengths of the sections.

Differential transmission line with common mode notch filter

Embodiments of the present invention provide for a transmission line stub that includes a via stub of a conductive via. The conductive via includes a via stub and a coupling element, wherein a first transmission line configured to transmit a signal is coupled to the conductive via at the intersection of the via stub and the coupling element. The coupling element is configured to transmit the signal from the first transmission line. A line stub electrically coupled to the via stub, wherein the length of the line stub is selected such that the transmission line stub having a length of the sum of the lengths of the via stub and the line stub is configured to suppress a preselected frequency.

Reduced backdrilling with quarter wavelength transmission line stubs

An apparatus for enclosing an electronic component to a base comprising, an enclosure attached to a base and surrounding an electronic component. The enclosure divided into a first portion and a second portion along a first plane substantially parallel to the base. The second portion of the enclosure is attached to the base. The first portion of the enclosure is attached to the second portion of the enclosure. The enclosure including one or more extruding elements on an exterior surface of the enclosure. The one or more extruding elements on the exterior surface of the enclosure increases an exterior surface area of the enclosure facilitating dissipation of heat from the electronic component.

Integrated circuit package for heat dissipation

High-speed serial communications between programmable devices connected to an I2C bus that includes a serial clock channel (SCL) and a serial data channel (SDA), having at least a logical low state and a logical high state. The programmable device determines if the SCL channel is idle, indicated by a logical high state. Determining the SCL to be idle, the programmable device holds the SCL to a logical low state. The programmable device operates high-speed serial communications using the SDA channel while holding the SCL to the low logical state. In response to completion of the high-speed communications, the programmable device releases the SCL channel and the SCL channel returns to the logical high state.

High speed overlay of idle I2C bus bandwidth

Embodiments of the present invention provide for a transmission circuit that includes a transmission line and a conductive via. The transmission line is electrically coupled to a first conductive via and a second conductive via. The first conductive via includes a first via stub, wherein the transmission line is configured to transmit a signal that is coupled to the first conductive via, and wherein the first via stub extends beyond the transmission line. The second conductive via includes a second via stub, wherein the transmission line is configured to transmit a signal that is coupled to the second conductive via, and wherein the second via stub extends beyond the transmission line. A transmission line stub is electrically coupled to the transmission line or to at least one of the conductive vias, wherein the length of the transmission line stub is configured to suppress a preselected frequency.

Growing community of inventors

Ottawa, Canada

Stephen John Flint