Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7945229 | Software-definable radio transceiver with MEMS filters A transceiver apparatus comprising a software-definable-radio-transceiver architecture. The transceiver apparatus comprises at least one up-conversion path including at least one configurable micro-electro-mechanical-system (MEMS) transmit filter communicatively cou... | 05/17/2011 |
| 7944961 | Systems and methods for improving pull-in performance in GPS signal processing Systems and methods for avoiding non-linear behavior of conventional early-minus-late correlator-based code loop discriminators. The present invention provides a model of correlator behavior that takes into account whether both correlators are on the same side of th... | 05/17/2011 |
| 7944745 | Flash memory array of floating gate-based non-volatile memory cells A flash memory array comprises a plurality of memory cells organized in a matrix of rows and columns. Each of the memory cells includes a floating gate memory transistor having a source region and a drain region, and a coupling capacitor electrically connected to th... | 05/17/2011 |
| 7944317 | Cold atom micro primary standard An atomic clock having a physics package that includes a vacuum chamber cavity that holds atoms of Rb-87 under high vacuum conditions, an optical bench having a single laser light source, a local oscillator, a plurality of magnetic field coils, an antenna, at least ... | 05/17/2011 |
| 7941198 | Internal audio multiplexing system for multi-channel radios A method of providing audio transmissions from an electronic device having internal audio multiplexing is disclosed. The method comprises combining a plurality of received audio input signals for output as a first mode of operation for the electronic device, where t... | 05/10/2011 |
| 7941114 | Noise measurement for radio squelch function A method implementable in an audio receiver having an input for receiving broadcast signals including a set of channels and a squelching controller includes converting the signals associated with each channel into respective digital signals, and tuning the digital s... | 05/10/2011 |
| 7940210 | Integrity of differential GPS corrections in navigation devices using military type GPS receivers A method and apparatus for calculating corrections to a navigation solution based on differential GPS data includes receiving GPS ephemeris from at least three GPS satellites. A PVT solution is resolved from the GPS ephemeris. The PVT solution includes a Circular Er... | 05/10/2011 |
| 7939766 | Apparatus for electromagentically shielding a portion of a circuit board An apparatus for electrically shielding electronic components is provided. The apparatus includes a circuit board having a first surface with a plurality of electronic components mounted on the first surface, the first surface having a first region and a second regi... | 05/10/2011 |
| 7937054 | MEMS based multiband receiver architecture A receiver comprising at least one micro-electromechanical system (MEMS) antenna-select switch, a MEMS filter bank communicatively coupled to the antenna-select switch and a plurality of intermediate frequency modules communicatively coupled to the MEMS filter bank ... | 05/03/2011 |
| 7936662 | Ranging and round trip delay timing adjustment in a multi-point to point bidirectional communication system A bidirectional communication system is provided. In one embodiment, a method for an orthogonal frequency division multiplexing multipoint-to-point communications system comprises establishing communication between a first remote unit of a plurality of remote units ... | 05/03/2011 |
| 7936540 | DC-DC converters having improved current sensing and related methods A DC-DC converter includes a chip including an error amplifier, a pulse width modulator (PWM), and an inductor driven by said PWM in series with an output node (VOUT), wherein a load current flows through the inductor. A circuit for sensing the load curre... | 05/03/2011 |
| 7936166 | Quarter cycle waveform detector A method for extracting peak information from an amplitude varying sinusoidal waveform output from a sensor is provided. The method includes gating a counter with a keying signal having a keying-signal period generated by a sinusoidal waveform associated with the am... | 05/03/2011 |
| 7934652 | Systems and methods for a lightweight north-finder Systems and methods for a lightweight north-finder. A method of using a north-finder includes a tube configured to fire munitions secured to a base in preparation of firing operations. A north-finder coupled to a tube in order to determine an azimuth and elevation. ... | 05/03/2011 |
| RE42316 | Systems and methods for self-test of a radar altimeter Systems and methods for testing a signal generated by a Direct Digital Synthesizer (DDS) in a radar altimeter. In an embodiment of the method, a voltage signal derived by comparing a fixed reference frequency to a ramped frequency signal generated by the DDS based o... | 05/03/2011 |
| 7933202 | Bounded minimal latency for network resources without synchronization Systems and methods for bounded minimal latency for network resources without synchronization are provided. In one embodiment, a method for managing data traffic between nodes in an asynchronous network comprises: receiving a data request message at a first port of ... | 04/26/2011 |
| 7933020 | System and method for reducing laser phase noise in a resonator fiber optic gyroscope A resonator gyroscope comprises a reference laser generator to produce a reference light; a first slave light source to produce a first slave light locked to the reference light; a second slave light source to produce a second slave light locked to the reference lig... | 04/26/2011 |
| RE42307 | Thermally compensated current sensing of intrinsic power converter elements A DC-to-DC converter includes one or more power switches, a pulse width modulation circuit for generating control pulses for the power switches, and an output inductor connected to the power switches. A thermally compensated current sensor is connected to an intrins... | 04/26/2011 |
| 7929431 | Port rate smoothing in an avionics network A communication network is provided. The network includes a least one switch and a plurality of ports. Each port is in communication with the at least one switch. At least one of the ports is configured to introduce a time delay after each transmission of a frame ba... | 04/19/2011 |
| 7928724 | Magnetic odometer with direction indicator systems and method Systems and methods for determining a directional movement of an object such as a wheeled vehicle. The system includes a magnet having a north pole and a south pole mounted to the object, a single magnetic sensor positioned such that the sensor can individually dete... | 04/19/2011 |
| 7926348 | Methods and systems for minimizing vibration rectification error in magnetic circuit accelerometers Systems and methods for minimizing vibration rectification error in magnetic circuit accelerometers. The systems include an accelerometer with an excitation ring that has a top piece with a lower portion inner diameter and a bottom piece having a diameter smaller th... | 04/19/2011 |
| 7926193 | Nanowire magnetic sensor A nanowire magnetic sensor includes an array of magneto-resistive (MR) nanosensors with each MR nanosensor including a set of MR nanowires that are all aligned in the same position for one direction. The substrate can be a flexible substrate bent into a circular con... | 04/19/2011 |
| 7923300 | Stacked power converter structure and method A power converter can include an output circuit having a high-side device and a low-side device which can be formed on a single die (a “PowerDie”). The power converter can further include a controller integrated circuit (IC) formed on a different die which can b... | 04/12/2011 |
| 7920858 | Multiprotocol antenna system for multiple service provider-multiple air interface co-located base stations In one embodiment of a system for distributing cellular radio frequency signals, a hub unit is configured to digitize first and second analog radio frequency signals in order to generate first and second digital data, respectively, indicative of the first and second... | 04/05/2011 |
| 7917177 | Communication system and method with gain control for signals from distributed antennas An apparatus for gain control in a communication system is disclosed. The apparatus includes means for receiving at least one aggregate communications signal, the at least one aggregate communications signal comprising a summation of distributed communications signa... | 03/29/2011 |
| 7916302 | Gyroscope mode shift detection and scale factor compensation A method for maintaining measurement accuracy of a ring laser gyroscope is disclosed. The method involves periodically measuring a path length control voltage in the ring laser gyroscope over a prescribed temperature range. When a first path length controlled by the... | 03/29/2011 |
| 7915936 | Output signal error detection, circumvention, signal reconstruction and recovery A method of dealing with anomalies in an output signal is provided. The method includes monitoring transitions in the output signal. When transitions do not occur at expected times, detecting an anomalous signal. Determining the type of anomalous signal based at lea... | 03/29/2011 |
| 7912596 | Vehicle trajectory visualization system A vehicle trajectory visualization system capable of displaying real-time (or recorded) vehicle orientation, position, velocity, and waypoint data using a 3D rendering system. The aforementioned data is transmitted from the vehicle to a base station that processes a... | 03/22/2011 |
| 7912138 | Timing and symbol alignment in multipoint-to-point communication using orthogonal frequency division multiplexing A multipoint-to-point, orthogonal frequency division multiplexed (OFDM) communication system is provided. The system includes a plurality of remote units and a host unit that includes a demodulator. Each of the remote units transmits an upstream OFDM signal using a ... | 03/22/2011 |
| 7912094 | Self-checking pair-based master/follower clock synchronization Systems and methods for network clock synchronization are provided. In one embodiment, a method for clock synchronization in a braided ring network comprises: providing a schedule for a braided ring network comprising a plurality of nodes, wherein at least two nodes... | 03/22/2011 |
| 7911375 | Doppler beam-sharpened radar altimeter Systems and methods for Doppler beam sharpening in a radar altimeter are provided. In one embodiment, a method comprises receiving a return signal at a radar altimeter receiver and applying a first gate to the return signal to select at least a first component of th... | 03/22/2011 |
| 7911194 | Controller and driver communication for switching regulators Pulse width modulation (PWM) controllers and output stage driver circuits and related methods of communicating switching regulator mode information. The controller includes circuitry that recognizes intervals when the load driven by the regulator is in a low power m... | 03/22/2011 |
| RE42237 | Active mode line voltage regulator for ringing subscriber line interface circuit A voltage regulator circuit arrangement limits the DC voltage applied to a tip and ring amplifiers of a subscriber line interface circuit (SLIC), each of which has a first polarity input coupled to a first current flow path to which a DC input (battery) voltage is c... | 03/22/2011 |
| RE42236 | Multiuse subcarriers in multipoint-to-point communication using orthogonal frequency division multiplexing Systems and methods for bidirectional communication are provided. In one embodiment, a multipoint-to-point, orthogonal frequency division multiplexed (OFDM) communication system comprises: a plurality of remote units, a host unit; wherein the host sends an adjustmen... | 03/22/2011 |
| 7908053 | Apparatus and method for troubleshooting a computer system An apparatus for troubleshooting a computer system of a vehicle is disclosed. The apparatus includes a controller for controlling an aspect of operation of the vehicle with at least one process. The apparatus also includes a diagnostic system configured to monitor t... | 03/15/2011 |
| 7907742 | Exciter for directly vibrating board and speaker apparatus used the same An exciter for directly vibrating a board treated for dustproofing and heat dissipation, provided with a vibrator comprised of an outer yoke, a permanent magnet, and inner yoke, having a coil fixed inserted between the outer yoke and inner yoke, and having a coupler... | 03/15/2011 |
| 7907628 | Priority based arbitration for TDMA schedule enforcement in a multi-channel system A multi-channel TDMA network having priority based is provided. A network includes a plurality of channels, and a plurality of nodes adapted to transmit and received data. Through each channel, every node is coupled to communicate data with every other node. Within ... | 03/15/2011 |
| 7907537 | System and method for electronically identifying connections of a cross-connect system A system and method for electronically identifying connections established through a cross-connect system provides for identification of all hard-wired and temporary patch connections, and any modifications made to same. Connection identification and status informat... | 03/15/2011 |
| 7907284 | Enhanced scale factor ring laser gyroscope An embodiment of the invention enhances the rotation sensitivity and decreases the dead band width of a standard HeNe ring laser gyroscope (RLG), with the highest enhancement at low rotation rates. The addition of a gas with nuclear spin to the traditional HeNe gain... | 03/15/2011 |
| 7907115 | Digitally synchronized integrator for noise rejection in system using PWM dimming signals to control brightness of cold cathode fluorescent lamp for backlighting liquid crystal display An apparatus and method for controlling the operation of a utility device, such as a cold cathode fluorescent lamp that is powered in accordance with a pulse width modulation (PWM) signal, includes an analog sensor which monitors the utility device to derive an outp... | 03/15/2011 |
| 7906948 | Threshold voltage monitoring and control in synchronous power converters A method of providing threshold voltage monitoring and control in synchronous power converters is disclosed. The method establishes a threshold voltage level for at least one of an upper gate and a lower gate power switch in a synchronous power converter. The thresh... | 03/15/2011 |
