-
公开(公告)号：US10720906B2
公开(公告)日：2020-07-21
申请号：US16029118
申请日：2018-07-06
Inventor： Douglas S. Jansen
Abstract: A voltage controlled oscillator (VCO) is disclosed to provide reduced phase noise at higher operating frequencies. A buffer-first VCO configured according to an embodiment includes multiple VCO core circuits configured to provide synchronously tuned oscillator signals. Each VCO core circuit is coupled to a summing node through a buffer circuit that generates uncorrelated phase noise such that the summing node provides a summation output of the oscillator signals with reduced phase noise. A multiplexer-less VCO configured according to an embodiment includes multiple buffer-first VCO circuits configured to provide oscillator signals covering a range of frequencies. Each buffer-first VCO circuit is controlled or selected by an enable signal. Buffer circuits are configured to select one of the buffer-first VCO circuits for coupling to a transmission line during a given time period based on the enable signal. The transmission line is terminated in a matched impedance at each end of the line.
-
公开(公告)号：US10720753B2
公开(公告)日：2020-07-21
申请号：US16101674
申请日：2018-08-13
Inventor： David B. Belley , Erik J. Spahr
Abstract: A mount connects a light emitting device, such as a laser diode assembly, to an optical bench. The mount may include a thermoelectrical module coupled to a sub-element of a heat exchanger extending through an opening formed in the optical bench. The thermoelectrical module acts as a heat sink to draw heat outwardly from the laser diode and cool the same. The heat sink enables the laser diode to transmit heat thereto such that substantially all of the heat generated by the laser diode sinks to the heat exchanger. As such, the laser diode transfers virtually no heat to the optical bench so the optical bench is free of deflections or distortions resultant from the heat generated during generation of the laser beam.
-
公开(公告)号：US10704865B2
公开(公告)日：2020-07-07
申请号：US15669640
申请日：2017-08-04
Inventor： James H. Steenson, Jr. , Derek P. Janiak
Abstract: Techniques are provided for a laser designation verification device and a method of laser designation verification using the device. The laser designation verification device includes: a lens to sense a first reflection, the first reflection coming from an encoded first laser beam reflecting off a first target; an electronic processing element to decode the sensed first reflection into a first code; and a portable electronic annunciator to provide identification of the first target to an operator of the device based on the decoded first reflection. The method includes: sensing a first reflection using the lens, the first reflection coming from an encoded first laser beam reflecting off a first target; decoding the sensed first reflection into a first code using the processing element; and providing, by the annunciator to an operator of the device, identification of the first target based on the decoded first reflection.
-
公开(公告)号：US10701371B1
公开(公告)日：2020-06-30
申请号：US16169639
申请日：2018-10-24
Inventor： Zachary J. Boll , Michael N. Mercier
IPC: H04N19/17 , H04N19/176 , G06F3/0484
Abstract: A system for lossless compression of high frame rate imagery includes at least one non-transitory computer readable storage medium having instructions encoded thereon that, when executed by at least one processor, implement operations to compress high frame rate imagery in a lossless manner, the at least one non-transitory computer readable storage medium including: logic to encode frame deltas to decrease pixel dynamic range; logic to localize frame deltas; and logic to encode subframes with lookback history to further decrease pixel dynamic range for temporary obstructions.
-
公开(公告)号：US10698103B2
公开(公告)日：2020-06-30
申请号：US15625468
申请日：2017-06-16
Inventor： Peter B. Weichman , Ira Ekhaus
Abstract: A system and method for generating high-resolution imagery using electromagnetic signals includes a moveable vehicle and a multiple-input multiple-output (MIMO) radar system carried by the vehicle. The MIMO radar system includes an antenna array having a plurality of antenna elements. One or more of the antenna elements transmits electromagnetic signals towards a target area and one or more of the antenna elements receives back-scattered electromagnetic signals reflected from the target area. The system generates high-resolution three-dimensional imagery based on back-scattered electromagnetic signal data with system performance characterized by: (a) down range resolution ΔR; (b) cross-range resolution ΔX; and (c) vertical resolution ΔH. The system exploits effective synthetic apertures to improve cross-range resolution ΔX and vertical resolution ΔH based on, at least in part, the movement of the vehicle along the trajectory and a width and height of the antenna array relative to the target area.
-
Patent Agency Ranking
146.发明授权公开(公告)号：US10698077B2
公开(公告)日：2020-06-30
申请号：US16453281
申请日：2019-06-26
Inventor： Mark W. Oden
Abstract: A computer-implemented method of geolocating a target includes: receiving, from a plurality of sources, a corresponding plurality of angle estimates of the target relative to the respective sources; generating a corresponding plurality of planar renditions of the received angle estimates; selecting a combination of two or more planar renditions whose intersection defines a polygon; in response to multiple such combinations, selecting one having a largest number of planar renditions; and determining a center of the polygon of the selected combination. A computer-implemented method of evaluating geolocation geometry with respect to a target includes: geolocating the target from received sensor data of the target from multiple sources and location data of the sources; generating entries of a covariance matrix from the location data and the geolocation; deriving eigenvalues of the covariance matrix from the generated entries; and comparing the derived eigenvalues to evaluate the geolocation geometry with respect to the target.
-
公开(公告)号：US20200186102A1
公开(公告)日：2020-06-11
申请号：US16211049
申请日：2018-12-05
Inventor： Randall M. White
Abstract: A dynamic differential amplifier includes: gain transistors to drive with differential input voltage levels; sample capacitors having first terminals to ramp from an initial voltage level to differential amplified voltage levels of the input voltage levels in response to the driven gain transistors; and adjustment circuits to adjust the amplified voltage levels in the direction of the initial voltage level by an offset voltage level. In some cases, second terminals of the sample capacitors are a common-mode node to maintain a common-mode voltage level midway between the ramping voltage levels of the first terminals. In some cases, the dynamic differential amplifier further includes a comparison circuit to compare the maintained common-mode voltage level to a threshold voltage level, wherein the first terminals of the sample capacitors stop ramping and the adjustment circuits adjust the amplified voltage levels in response to the compared common-mode voltage level reaching the threshold voltage level.
-
公开(公告)号：US20200169391A1
公开(公告)日：2020-05-28
申请号：US16200984
申请日：2018-11-27
Inventor： Benjamin Kapp , Jibu Abraham
IPC: H04L9/08
Abstract: Techniques are disclosed for multi-hop security amplification. The techniques disclosed provide multi-hop security amplification by applying a secret sharing scheme to data as the data is routed within a network to an intended recipient device. In an embodiment, a sending device divides the data into shares based on a secret sharing scheme, and sends the shares to respective network nodes in a network. These network nodes then divide their respective shares into lower-level shares based on the secret sharing scheme, and route the lower-level shares to downstream network nodes for further routing to the intended recipient device. The intended recipient device receives some or all of the lower-level shares and reconstructs the data from the received lower-level shares. In an embodiment, the secret sharing scheme is a threshold-based secret sharing scheme, such as Shamir's secret sharing scheme.
-
公开(公告)号：US10666475B2
公开(公告)日：2020-05-26
申请号：US16173796
申请日：2018-10-29
Inventor： William D. Watson , Prabahan Basu , Jonathan P. Beaudeau , David J. Couto
IPC: H04J13/10 , H04L27/227 , H04L27/20
Abstract: An electronic transmitter includes: a modulator to phase modulate a carrier signal with a baseband signal using a phase modulation sequence; and an emitter to emit the phase modulated signal. The phase modulated signal has poor autocorrelation, has a corresponding mismatched filter based on the phase modulation sequence, and is configured to demodulate into the baseband signal through poor cross-correlation with the mismatched filter. Sometimes, the transmitter is part of a sensing apparatus, where the emitter emits the phase modulated signal at a target and the emitted signal reflects off the target. The sensing apparatus includes a receiver that has a collector to collect the reflected signal, and a demodulator to demodulate the collected signal into the baseband signal through the poor cross-correlation with the mismatched filter. Sometimes, the transmitter is part of a communication system, where the emitter emits the phase modulated signal to an intended recipient.
-
公开(公告)号：US20200149646A1
公开(公告)日：2020-05-14
申请号：US16185868
申请日：2018-11-09
Inventor： Kenneth D. Cleveland , Joseph A. Colosimo , Michael J. Patrick , John A. Talbourdet
Abstract: A pressure relief valve having two rigid sealing surfaces lapped to a smoothness Ra of 8 micro-inches or less, and flatness within 80 micro-inches, forms a reliable seal by direct contact therebetween without an elastomer. The sealing surfaces and surrounding structures can be made of one or more metals, such as alloys of stainless steel, and can be CTE-matched, so that the valve is not impeded by environmental temperature changes. In a disclosed embodiment, a “poppet” is axially pressed against a seal plate by a spring. The poppet can be axially stabilized by sliding within a surrounding cylinder or spacer, and can contact the surrounding surface with a plurality of “arms” that reduce friction and enable gas flow therebetween. The poppet can be made from anti-galling Nitronic 60 alloy, and the surrounding structures can be stainless steel. Embodiments are suitable for low-pressure gas applications in extreme environments.
-
-
-
-
-
-
-
-
-
Search Results
1492
records
(took 0.028 seconds)
