Patents by Inventor Lawrence Larson
Lawrence Larson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240085174Abstract: Methods and systems for feed-forward of multi-layer and multi-process information using XPS and XRF technologies are disclosed. In an example, a method of thin film characterization includes measuring first XPS and XRF intensity signals for a sample having a first layer above a substrate. The first XPS and XRF intensity signals include information for the first layer and for the substrate. The method also involves determining a thickness of the first layer based on the first XPS and XRF intensity signals. The method also involves combining the information for the first layer and for the substrate to estimate an effective substrate. The method also involves measuring second XPS and XRF intensity signals for a sample having a second layer above the first layer above the substrate. The second XPS and XRF intensity signals include information for the second layer, for the first layer and for the substrate.Type: ApplicationFiled: August 21, 2023Publication date: March 14, 2024Applicant: NOVA MEASURING INSTRUMENTS INC.Inventors: Heath POIS, Wei T LEE, Lawrence BOT, Michael KWAN, Mark KLARE, Charles LARSON
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Patent number: 9853623Abstract: A high-selectivity low-loss duplexing system includes a first duplexer having a first port, a second port, a transmit port and a receive port. A second duplexer has a third port, a fourth port, an inverted transmit port and the receive port. The first port and the third port are connected to an antenna by a balun. The transmit port and the inverted transmit port are connected to at least one power amplifier. The receive port is connected to a low noise amplifier. A phase shifter includes a lattice filter configured to short the second port to the third port and the fourth port to the first port at a receive frequency, and short the second port to the first port and the fourth port to the third port at a transmit frequency.Type: GrantFiled: December 11, 2015Date of Patent: December 26, 2017Assignee: Brown UniversityInventor: Lawrence Larson
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Publication number: 20160182006Abstract: A high-selectivity low-loss duplexing system includes a first duplexer having a first port, a second port, a transmit port and a receive port. A second duplexer has a third port, a fourth port, an inverted transmit port and the receive port. The first port and the third port are connected to an antenna by a balun. The transmit port and the inverted transmit port are connected to at least one power amplifier. The receive port is connected to a low noise amplifier. A phase shifter includes a lattice filter configured to short the second port to the third port and the fourth port to the first port at a receive frequency, and short the second port to the first port and the fourth port to the third port at a transmit frequency.Type: ApplicationFiled: December 11, 2015Publication date: June 23, 2016Applicant: Brown UniversityInventor: Lawrence Larson
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Publication number: 20070069813Abstract: The invention provides methods and devices for estimating power amplifier nonlinearity using simple correlation techniques. Methods and devices of the invention can monitor a power amplifier that has digitally modulated inputs and an output containing more than one signal stream. A preferred method of the invention creates a test signal by forming the products of several pseudorandom noise sequences from the digitally modulated inputs to the power amplifier. Nonlinear contributions of the power amplifier output are determined by cross-correlating the test signal and the total output signal of the power amplifier. In preferred embodiments, the determined nonlinear contributions of the power amplifier are used to introduce corrective predistortion in the power amplifier.Type: ApplicationFiled: September 5, 2006Publication date: March 29, 2007Inventors: Mingyuan Li, Peter Asbeck, Ian Galton, Lawrence Larson
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Publication number: 20050024169Abstract: A switch comprising a substrate, an elongated movable part, a pair of electrical contacts disposed at one side of said part, an actuation electrode disposed at the one side of the part and separated from the pair of electrical contacts, wherein the part, the contacts and the electrode are disposed on the substrate, wherein the elongated movable part is arranged and dimensioned such that the part is movable in a generally lateral direction toward the contacts; the movable part includes a central elongated member fixed to a head having an electrical contact disposed at the one side. One end of the movable part is attached to the substrate by means of various anchoring arrangements.Type: ApplicationFiled: August 11, 2004Publication date: February 3, 2005Inventors: Hariklia Deligianni, Christopher Jahnes, Jennifer Lund, Lawrence Larson
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Patent number: 6847266Abstract: Microelectromechanical RF and microwave frequency power limiter and electrostatic protection devices for use in high-speed circuits are presented. The devices utilize an airbridge or a cantilever arm including a contact pad positioned operatively adjacent to an electrically conductive and substantially planar transmission line. When the power level in the transmission line exceeds a particular threshold, the airbridge or cantilever arm yields due to force between the contact pad and the transmission line, directing undesired power away from active devices. This characteristic can either serve as a method by which to limit the amount of power passing through the transmission line to a determined value or as a method by which to protect devices along the transmission line from damage due to large electrostatic bursts.Type: GrantFiled: January 6, 2003Date of Patent: January 25, 2005Assignee: HRL Laboratories, LLCInventors: David Laney, Mehran Matloubian, Lawrence Larson
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Publication number: 20040117136Abstract: A system for scheduling the generation of energy in an energy distribution network having a plurality of customers and a plurality of energy sources, wherein the customer chooses an energy provider from which to receive its energy. The system comprises memory in communication with the input. The memory is configured to store a schedule for each customer, the schedule setting forth the predicted energy consumption for that customer over a predetermined period of time. A processor is in communication with the memory. The processor is configured to sum the schedules for each energy provider thereby creating a load schedule for each energy provider. An output interface is in communication with the processor. The output interface is configured to output each of the load schedules.Type: ApplicationFiled: October 28, 2003Publication date: June 17, 2004Applicant: Retx.com, Inc.Inventors: Ward Uggerud, Donald Davenport, Bradley Tollerson, Dale Hanson, Myron Rader, Katherine Sasseville, Lawrence Larson, Kirby Kugler, Wallace Ness, Tom Brause
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Patent number: 6735424Abstract: A discrete low-noise amplifier designed to operate in a mobile wireless environment uses two cascaded GaAs FETs to achieve 25 dB gain and 0.9 dB noise figure at 2.5 GHz. Active bias control circuitry responsive to monitored amplifier output power automatically and continuously adjusts the drain-source currents, and the load lines, of the cascaded FETs to (i) maintain power consumption at 33 milliwatts in nominal small-signal conditions, and to (ii) provide an elevated input third-order intermodulation intercept point (IP3) and a reduced noise figure during the presence of jamming. A 15 dB improvement in the input IP3 is achieved in large-signal operation. Amplifier operation is supported by an a.c. power detector of enhanced sensitivity and responsiveness because of un-grounded operation.Type: GrantFiled: June 14, 2000Date of Patent: May 11, 2004Assignee: The Regents of the University of CaliforniaInventors: Lawrence Larson, Wei Xiong
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Publication number: 20030222728Abstract: Microelectromechanical RF and microwave frequency power limiter and electrostatic protection devices for use in high-speed circuits are presented. The devices utilize an airbridge or a cantilever arm including a contact pad positioned operatively adjacent to an electrically conductive and substantially planar transmission line. When the power level in the transmission line exceeds a particular threshold, the airbridge or cantilever arm yields due to force between the contact pad and the transmission line, directing undesired power away from active devices. This characteristic can either serve as a method by which to limit the amount of power passing through the transmission line to a determined value or as a method by which to protect devices along the transmission line from damage due to large electrostatic bursts.Type: ApplicationFiled: January 6, 2003Publication date: December 4, 2003Inventors: David Laney, Mehran Matloubian, Lawrence Larson
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Publication number: 20030093232Abstract: A system for scheduling the generation of energy in an energy distribution network having a plurality of customers and a plurality of energy sources, wherein the customer chooses an energy provider from which to receive its energy. The system comprises memory in communication with the input. The memory is configured to store a schedule for each customer, the schedule setting forth the predicted energy consumption for that customer over a predetermined period of time. A processor is in communication with the memory. The processor is configured to sum the schedules for each energy provider thereby creating a load schedule for each energy provider. An output interface is in communication with the processor. The output interface is configured to output each of the load schedules.Type: ApplicationFiled: January 3, 2003Publication date: May 15, 2003Applicant: Retx.com, Inc.Inventors: Ward Uggerud, Donald Davenport, Bradley Tollerson, Dale Hanson, Myron Rader, Katherine Sasseville, Lawrence Larson, Kirby Kugler, Wallace Ness, Tom Brause
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Patent number: 6529839Abstract: A system for scheduling the generation of energy in an energy distribution network having a plurality of customers and a plurality of energy sources, wherein the customer chooses an energy provider from which to receive its energy. The system comprises memory in communication with the input. The memory is configured to store a schedule for each customer, the schedule setting forth the predicted energy consumption for that customer over a predetermined period of time. A processor is in communication with the memory. The processor is configured to sum the schedules for each energy provider thereby creating a load schedule for each energy provider. An output interface is in communication with the processor. The output interface is configured to output each of the load schedules.Type: GrantFiled: May 28, 1998Date of Patent: March 4, 2003Assignee: Retx.com, Inc.Inventors: Ward Uggerud, Donald Davenport, Bradley Tollerson, Dale Hanson, Myron Rader, Katherine Sasseville, Lawrence Larson, Kirby Kugler, Wallace Ness, Tom Brause
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Patent number: 6504447Abstract: The present invention provides a flexible mechanical bridge over a microstrip on a substrate, which utilizes an electromagnetic field increase, as generated by temporary power surge to shunt harmful power away from a MMIC system. The invention includes a power limiter which includes an airbridge 11, preferably in the form of an electrically conductive strip with ground contacts 1 and 3 formed thereon. The ground contacts 1 and 2 are electrically connected, through via holes 5 and 7 respectively, to a metallization layer 15 formed on the bottom side of a substrate 9. The air bridge 11 is designed such that it traverses an electrically conductive microstrip 13 forming an air gap 16 between the air bridge 11 and the electrically conductive microstrip 13. When there is a power surge the air bridge 11, will flex to cause an electrical connection with the microstrip 13, thereby directing the unwanted signal through the ground contacts 1 and 3 and the via holes 5 and 7 to the metallization layer 15.Type: GrantFiled: October 30, 1999Date of Patent: January 7, 2003Assignee: HRL Laboratories, LLCInventors: David Laney, Mehran Matloubian, Lawrence Larson
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Publication number: 20020130716Abstract: In a reduced-distortion bandpass filtering circuit, and method, a small portion, normally −20 db, of an input signal, normally narrowband rf, is fed forward while a major signal portion is filtered in a first bandpass filter, inducing distortion. The small portion fed forward is itself bandpass filtered in a second bandpass filter, preferably identical to the first. Because the signal level is lower, less distortion is produced. The second-bandpass-filtered small portion is subtracted from yet another small, −20 db, portion now fed forward from the first-bandpass-filtered signal, distortion and all. Undistorted parts of the two signals cancel, isolating the signal distortion. This distortion is amplified and adjusted in phase, and then subtracted from the first-bandpass-filtered signal, producing a signal in which substantially all distortion induced by filtering in the first bandpass filter is canceled.Type: ApplicationFiled: March 14, 2001Publication date: September 19, 2002Inventors: Lawrence Larson, Robert Hammond, Balam Willemsen, David Chase, Peter Asbeck
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Publication number: 20020130729Abstract: In a bandpass filter circuit usable at the front end of a cellular microwave radio receiver, and particularly suitable for implementation with high temperature superconductor transmission lines, an rf input signal is split in a first coupler into a major first portion and a minor second portion. A first bandpass filter of inevitable non-linearity receives the first signal portion and produces therefrom a first-bandpass-filtered signal having distortion products collectively of a first power. A second bandpass filter having substantially identical passband and noise characteristics to, but with a non-linearity much greater than, the first bandpass filter receives the second signal portion of the input signal and produces therefrom a second-bandpass-filtered signal which has distortion products substantially collectively equal to the first power.Type: ApplicationFiled: March 14, 2001Publication date: September 19, 2002Inventors: Lawrence Larson, Robert Hammond, Balam Willemsen, David Chase, Peter Asbeck
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Patent number: 5835128Abstract: A system for redistributing a television signal to a multiplicity of receiver units within a multiple dwelling unit (MDU) includes a main receiving antenna which receives a broadband television signal and a translation device that translates the broadband television signal into a different carrier frequency band. One or more broadcasting antennas, located at advantageous sites within the MDU, transmit the translated television signal along one or more walls of the MDU to be received by antennas associated with one or more individual receiver units. Each receiver unit demodulates the received television signal and provides a user-specified channel to a television set for display.Type: GrantFiled: November 27, 1996Date of Patent: November 10, 1998Assignee: Hughes Electronics CorporationInventors: Perry A. Macdonald, Lawrence Larson, Jeffrey B. Shealy, Michael Case, Mehran Matloubian
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Patent number: 4896121Abstract: A novel, precise current mirroring technique for depletion-mode field effect transistor technology uses a diode level-shifting circuit between the drain and the gate of a first depletion-mode Field Effect Transistor (FET) to keep its gate voltage below its drain voltage. The gate of the first depletion-mode FET is connected to the gate of a second depletion-mode FET. A current source is used to compensate for the current drawn by the level-shifting circuit. The current source preferably includes a FET and at least one Schottky diode.Type: GrantFiled: October 31, 1988Date of Patent: January 23, 1990Assignee: Hughes Aircraft CompanyInventor: Lawrence Larson
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Patent number: RE41582Abstract: A discrete low-noise amplifier designed to operate in a mobile wireless environment uses two cascaded GaAs FETs to achieve 25 dB gain and 0.9 dB noise figure at 2.5 GHz. Active bias control circuitry responsive to monitored amplifier output power automatically and continuously adjusts the drain-source currents, and the load lines, of the cascaded FETs to (i) maintain power consumption at 33 milliwatts in nominal small-signal conditions, and to (ii) provide an elevated input third-order intermodulation intercept point (IP3) and a reduced noise figure during the presence of jamming. A 15 dB improvement in the input IP3 is achieved in large-signal operation. Amplifier operation is supported by an a.c. power detector of enhanced sensitivity and responsiveness because of un-grounded operation.Type: GrantFiled: May 11, 2006Date of Patent: August 24, 2010Assignee: The Regents of the University of CaliforniaInventors: Lawrence Larson, Wei Xiong