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| Number | Title | Issue Date |
| 7421053 | Fast clock acquisition enable method using phase stir injection to PLL for burst mode optical receivers Systems and methods for aligning the phase of a PLL with an incoming data signal. In one embodiment, when a data signal is received in a PLL, a phase perturbation signal is generated and injected into the PLL. The PLL then performs a phase alignment procedure to loc... | 09/02/2008 |
| 7391359 | Mode S transponder transmission signal decoder and Mode S transponder transmission signal decoding method There are provided a differential processing unit which performs differential processing for a Mode S transponder transmission signal, an auto correlation arithmetic operation unit which performs an arithmetic operation of a degree of auto correlation between an inc... | 06/24/2008 |
| 7345620 | Method and device for the adaptive regulation of power A method and a device for adaptively controlling power in a radar device having a radar transmitter and a radar receiver are provided, in particular for applications in vehicles. The radar signals are emitted, and radar signals reflected off of target objects are re... | 03/18/2008 |
| 7342986 | Digital PLL device A phase-locked-loop device includes a clock generator for generating a reference clock based on a binarized playback signal and a frequency of run-length data and for generating N-phase clocks using the reference clock, a pulse-length measuring device for measuring ... | 03/11/2008 |
| 7336106 | Phase detector and method having hysteresis characteristics A phase detector generates a first output signal if a feedback clock signal leads a reference clock signal by more than a first time. The phase detector generates a second output signal if the feedback clock signal lags the reference clock signal by more than a seco... | 02/26/2008 |
| 7298313 | Radar-compatible data link system (U) The invention provides a radar system capable of transmitting data communications concurrently with and on a non-interfering basis with the normal radar functions. A continuous-wave carrier frequency is generated and transmitted to perform the normal radar function ... | 11/20/2007 |
| 7274323 | Remote phase synchronization using a low-bandwidth timing referencer A method and apparatus for synchronized clocking between a radar receiver and a radar transmitter includes sharing a reference signal between the transmitter and receiver, dividing the common reference into a transmit clock signal in the transmitter and a receive cl... | 09/25/2007 |
| 7239266 | Radar altimeter The present invention provides a radar altimeter system with a closed loop modulation for generating more accurate radar altimeter values. The system includes an antenna, a circulator, a receiver, and a transmitter. The circulator receives or sends a radar signal fr... | 07/03/2007 |
| 7209074 | Temperature compensation improvements in radar apparatus A radar-based distance measurement apparatus comprises a microwave circuit comprising a frequency generator which produces a microwave frequency signal, the frequency of which is modulated by an amount determined by a modulation signal applied to the frequency gener... | 04/24/2007 |
| 7199750 | Real-time multistatic radar signal processing system and method A real-time signal processing engine robustly detects, localizes, tracks and classifies ground targets based on radar signals from a multistatic radar system. The system differentiates between different targets based on an optimized cost function, which can include ... | 04/03/2007 |
| 7199751 | Radar equipment A radar equipment of the present invention amplifies a reception signal with feedback based on the delay amount obtained from the correlation detection result. Accordingly, it becomes possible to maintain the reception signal (demodulated signal) level to a proper l... | 04/03/2007 |
| 7151476 | Radar system having a beamless emission signature A radar system having a beamless emission signature is described. In one implementation, the radar system includes a transmission system and a receiver system. The transmission system is configured to transmit a pattern comprising a plurality of radar signals having... | 12/19/2006 |
| 7139545 | Ultra-wideband fully synthesized high-resolution receiver and method An ultra-wideband receiver system includes an intelligent-preselector stage to up-convert received signals to signals within a first IF frequency-range with stepped first oscillation signals, a first down-converting stage to down-convert the signals within the first... | 11/21/2006 |
| 7133324 | Synchronous dynamic random access memory devices having dual data rate 1 (DDR1) and DDR2 modes of operation and methods of operating same A dual data rate dynamic random access memory (DDR DRAM) device may operate in dual DDR modes via a mode selection circuit configured to enable a Dual Data Rate (DDR) 1 mode of operation for the DDR DRAM or a DDR2 mode of operation for the DDR DRAM. | 11/07/2006 |
| 7119583 | Phase detector and method having hysteresis characteristics A phase detector generates a first output signal if a feedback clock signal leads a reference clock signal by more than a first time. The phase detector generates a second output signal if the feedback clock signal lags the reference clock signal by more than a seco... | 10/10/2006 |
| 7098844 | Acceleration detector with integral vehicle parameter display using a vehicle interface Calibration of an acceleration detector is initiated by a user depressable button such as a button indicating a vehicle is at rest and/or by the detector reading an OBDII vehicle communication protocol to determine the condition of the vehicle. Calibration permits m... | 08/29/2006 |
| 7019684 | Phase lock loop circuitry An arrangement for reducing the effect of vibration-induced changes in phase of the first local oscillator in a tracking receiver wherein final detection is accomplished by a synchronous detector in a phase lock loop incorporating a voltage-controlled oscillator is ... | 03/28/2006 |
| 7009552 | Radar device and method of measuring distance and reflecting factor A radar device for measuring distance within short range is provided. The radar device has a first wave-detecting circuit for multiplying radio wave voltage being transmitted from a transmitting antenna by radio wave voltage being received by a receiving antenna, in... | 03/07/2006 |
| 6636979 | System for measuring phase error between two clocks by using a plurality of phase latches with different respective delays A phase error measurement circuit for measuring phase error between two clocks on an integrated circuit is provided. The measurement circuit includes first and second clock signal inputs, a phase lead detector, a phase lag detector and a phase error measu... | 10/21/2003 |
| 6486826 | Arrangement for the precise distance measuring, in particular the filling level measuring An arrangement for the precise measuring of the distance with a FMCW radar device having a frequency-variable digitally-actuated oscillator to generate a transmitting frequency which can be tuned over a predetermined frequency range. The digital actuation... | 11/26/2002 |
| 6204802 | Apparatus for detecting relative velocity In order to produce relative velocity signals in accordance with the relative velocity between a following and a preceding vehicle, a Doppler signal transmitter, which targets the preceding vehicle, is attached to the following vehicle. The thus obtained ... | 03/20/2001 |
| 6114987 | Dual-loop linearizer for FM-CW radar A system and method for generating a linear frequency sweep while also improving the phase noise characteristics of a microwave or millimeter wave signal source. The invention uses two phase lock loops. The first phase lock loop uses a linear frequency so... | 09/05/2000 |
| 6081224 | High accuracy, low speed doppler effect radar and signal conditioning circuit useful in agricultural applications A control system for a mobile planting apparatus which permits discrete plant spacing to be determined and maintained independent of wheel rotation on the planting apparatus having: (1) a ground speed sensor wherein the rate of movement relative to the gr... | 06/27/2000 |
| 5914683 | Ultra high resolution ranging unit A low cost, real time, remote sensor device for accurately measuring distance to an object with a resolution of 1 millimeter or better using phase information from either electromagnetic or acoustic energy. The device repetitiously transmits a swept frequ... | 06/22/1999 |
| 5745442 | Digital time interval measurement engine for a time of flight system An exclusively digital timing engine that measures extremely short time intervals for use in time of flight systems such as laser range finding systems. This exclusively digital timing engine minimizes the use of high speed, high cost components by employ... | 04/28/1998 |
| 5614910 | Miss distance vector scoring system A miss distance scoring system comprising four antennas which are configu to provide for an optimal radiation pattern of pulsed radio frequency energy to determine a missile's miss distance and miss direction from a target. Reflected pulses from a missil... | 03/25/1997 |
| 5453748 | Method and apparatus for responding to an interrogation signal A transponder receives a stable reference frequency transmitted from an interrogator and compares the stable reference frequency to a local oscillator frequency that has short term stability. A comparison signal is provided to a synchronous oscillator for... | 09/26/1995 |
| 5430537 | Light beam distance encoder A light beam encoder for measuring absolute distance over a linear path with an accuracy of at least that provided by incremental optical encoders, but over longer ranges than can readily be achieved with optical linear encoders due to the difficulty of p... | 07/04/1995 |
| 5400034 | Digital phase lock detector A digital phase lock detector for determining the periods of an incoming signal for use in measuring rapidly and accurately the relative speed or velocity of vehicles according to the Doppler-radar principle includes a micro-controller based processor uni... | 03/21/1995 |
| 5317320 | Multiple radar interference suppressor A multiple radar interference suppressor for use in a missile scoring system. The multiple radar interference suppressor phase locks the pulse repetition frequency of each drone (unmanned) aircraft to one other drone of the plurality of aircrafts. The pha... | 05/31/1994 |
| 5311190 | Transmit and receive antenna element with feedback A transmit/receive element having a transmit/receive circuit that includes a variable frequency transmit phase lock loop and a variable frequency receive phase lock loop, and an output amplifier that receives a modulated transmit signal from the transmit ... | 05/10/1994 |
| 5307071 | Low noise frequency synthesizer using half integer dividers and analog gain compensation A low noise frequency synthesizer 10 that uses uses frequency dividers 13, 15, at least one of which(divider 15) is incrementable and decrementable in half integer steps, and analog gain compensation in a phase/frequency detector 14 to achieve lower noise... | 04/26/1994 |
| 5298904 | Distance measuring system A distance measuring system which may be used on a golf course in order for a golfer to accurately measure the distance between the present lie of his golf ball and the hole toward which he is currently advancing the golf ball. A master transceiver statio... | 03/29/1994 |
| 5291206 | Multiple target discrimination system A radar homing system in a guided missile for intercepting one of a group of targets, such as aircraft flying in formation. Offset circuitry places undesired Doppler target returns outside of the IF filter bandpass frequency of the system. The system is d... | 03/01/1994 |
| 5221062 | Frequency synthesizer A frequency synthesizer (100) for use in combination with the transmitter (30) for transmitting guidance information to one or more ground launched active radar guided missiles simultaneously which is tunable to a plurality of frequencies separated by a p... | 06/22/1993 |
| 5125736 | Optical range finder An optical range finder includes two detectors for minimizing frequency dispersion affects of the detectors on the system. The optical range finder is calibrated by locking a voltage controlled oscillator onto adjacent null modulation signal frequencies a... | 06/30/1992 |
| 5063387 | Doppler frequency compensation circuit In a communications data link network of the type having a plurality of ground stations and a single moving airborne station, there is provided a doppler frequency compensation circuit in each of the ground stations. The downlink carrier frequency is fixe... | 11/05/1991 |
| 5034748 | Narrow band automatic phase control tracking circuitry The invention disclosed herein relates in general to an improved circuitry or narrow band frequency tracking system for doppler radar and includes third order phase lock loop circuitry to improve tracking techniques. This enables tracking input frequency v... | 07/23/1991 |
| 4806934 | Tracking circuit for following objects through antenna nulls A circuit for removing abrupt phase changes in a received signal, such as those caused when an object tracking system's directional receiving antenna becomes misaligned with the tracked object. The circuit uses a phase detector to determine when an abrupt... | 02/21/1989 |
| 4788547 | Static-split tracking radar systems A static-split tracking radar system with substantially improved performance. The system includes parallel signal processing channels for processing sum and difference signals from a target-seeking aerial array, to produce target tracking signals. Novel m... | 11/29/1988 |
