Hrl Laboratories, LLC

Other

Brian G Hughes

Brian Jones

Rongming Chu

Karim S Boutros

Jonathan James Lynch

Carson R White

Sameh G Khalil

Daniel M Zehnder

Ryan A Hughes

A half bridge circuit includes a sapphire substrate, a GaN upper switch on the sapphire substrate, a GaN lower switch on the sapphire substrate and coupled to the GaN upper switch, a first conductor coupled to the upper switch, a second conductor coupled to the lower switch, and a capacitor. A portion of the first conductor and a portion of the second conductor are on a plane vertically separated from the upper switch and the lower switch by a height, and the capacitor is coupled between the portion of the first conductor and the portion of the second conductor.

GaN-on-sapphire monolithically integrated power converter

Photo-switchable relays and switches and dual gate III-switches having a photo switchable normally-off region located in the channel layer of the device are disclosed where irradiation of the normally-off regions with an appropriate wavelength of radiation results in generation of charge carriers and the flow of electricity through the device being turned on and off in response to the radiation being turned on and off.

Dual gate III-switch for high voltage current relay

A charger vending assembly includes a housing that may be positioned on a support surface. A vending unit is movably positioned within the housing and the vending unit contains a plurality of chargers. The vending unit selectively dispenses a selected number of the chargers outwardly from the housing. In this way the selected number of chargers may be used to charge an electronic device. A control unit is coupled to the housing and the control unit is selectively manipulated. The control unit is electrically coupled to the vending unit such that the control unit controls operational parameters of the vending unit. The vending unit dispenses the selected chargers in accordance with commands from the control unit.

Charger vending assembly

A switched mode negative inductance circuit includes an input node responsive to a voltage signal. The circuit also includes first and second voltage sources, first and second controlled switches having first poles coupled to the first and second voltage sources, respectively and an inductor having a first electrode coupled to second poles of the first and second controlled switches and a second electrode coupled to the input node. The input node is coupled to a control electrode of the first controlled switch, and to a control electrode of the second controlled switch through a voltage inverting circuit. The disclosure also illustrates balanced negative inductance circuits and implementation approaches using NMOS transistors.

Switched mode negative inductor

A traveling wave detector and method of traveling wave signal detection employ a plurality of detector diodes connected according to different polarities with respect to adjacent ones of the detector diodes. The traveling wave detector includes a transmission line having an input end and a terminal end and the plurality of detector diodes connected as stated above and spaced apart along the transmission line. The traveling wave detector further includes a plurality of direct current (DC) blocks to define a series conduction path. The method of traveling wave signal detection includes rectifying a received incident signal using the traveling wave detector to produce a video signal at each of the detector diodes and summing the video signals along the series conduction path to produce an output video signal.

Traveling wave detector

A half bridge circuit including an isolation substrate, a metal layer on one surface of the isolation substrate, a power loop substrate on the metal layer, an upper switch on the power loop substrate, a lower switch on the power loop substrate and coupled to the upper switch, a capacitor on the power loop substrate and coupled to the upper switch, a first via through the power loop substrate and coupled between the lower switch and the metal layer, and a second via through the power loop substrate and coupled between the capacitor and the metal layer, wherein the power loop substrate has a height and separates the metal layer from the upper switch, lower switch and capacitor by the height.

Reduction of the inductance of power loop and gate loop in a half-bridge converter with vertical current loops

Design constraints for a self protecting GaN HFET and in general any group III V HFET are described. The design constraints depend on the separation between the gate and the drain and the thickness of the buffer material between the channel layer and the substrate. In one embodiment the buffer region is thinned to provide a preferred breakdown location.

Overvoltage tolerant HFETs

A portal extends through a vertical surface. The portal is bounded laterally by a vertical closing rail and a parallel opening rail. A flexible door has a size essentially equal to that of the portal. The door has an interior edge and an exterior edge. The interior edge is secured within the closing rail. Guide mechanisms include fixed upper and lower tracks. The upper and lower tracks are adapted to receive and guide the movement of the door when moving to and from an open orientations. A closure assembly includes upper and lower cables and pulleys adapted to move the door to the closed orientation.

Closing-biased retractable screen door system

An entertainment system for use with a magnetic resonance imaging (MRI) device that includes video glasses and headphones. A Faraday shield encloses the entertainment system to reduce adequately RF signals from entering or leaving the entertainment system. The entertainment system may have non-ferromagnetic RF low-pass filters between parts of the system, such as the control unit and the video glasses, to reduce higher RF signals from entering or leaving those parts. To replace the battery and or entertainment media, a person opens the entertainment system's Faraday shield when not MRI imaging or outside the MRI magnet room. The door has an Faraday shield overlapping the system Faraday shield and making low resistance RF contact. The entertainment system has a minimal amount of ferromagnetic material so that it may operate within the high magnetic field of the MRI magnet bore with minimal performance degradation. The entertainment system uses non-ferromagnetic speakers in the headphone. Passive ear protection and noise cancellation reduce the loud noise of the MRI system heard by the patient to a level where the patient can hear the entertainment. The entertainment system includes a charger for the rechargeable batteries.

Entertainment system for use during the operation of a magnetic resonance imaging device

A rectangular one-piece garage door has rigid horizontal upper and lower rails and rigid vertical first and second side rails. A small door is mounted in the garage door. A track assembly has horizontal first and second upper tracks. The track assembly has vertical first and second lower tracks. An arcuate first intermediate track couples the first upper track and the first lower track. An arcuate second intermediate track couples the second upper track and the second lower track. First and second upper hinged brackets are secured to the garage door adjacent to the upper rail. First and second lower brackets are secured to the garage door adjacent to the lower rail. Rollers are each coupled to one of the brackets and rotatably received within one of the tracks for guiding the movement of the garage door between a closed lower orientation and an open raised orientation.

Garage door/track/coupler system

Each of two tracks are in an inverted L-shaped configuration and have a vertical section and a horizontal section. A single panel garage door is mounted for movement in the tracks between a closed orientation between the vertical sections and an open orientation between the horizontal sections. A rectangular portal is positioned within the garage door. Major screening in the garage door is at locations remote from the portal. A screen door within the portal is moveable between a closed orientation over the portal and an open orientation remote from the portal.

Garage screen door system

A frame has a circumferential slot and a circumferential chamber. Each of a plurality of similarly configured clips has a base and a leg. A screen has an attachment region through the slot and within the chamber. The leg of each clip is in contact with the attachment region of the screen. An elongated flexible spline is located within the chamber in contact with the attachment region of the screen. The clip is adapted to hold the screen in position with respect to the frame until the spline is inserted into the chamber in contact with the attachment region of the screen for securement purposes.

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Indian Lakes Estates, FL, United States of America

Brian G Hughes