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7630689 |
Electronic device
An electronic device that can receive an AM radio broadcast signal and has a switching power supply circuit, wherein a switching frequency of the switching power supply circuit is detected and a...
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7603093 |
System and method to monitor broadband radio frequency transport systems
A system to monitor gain in a broadband radio frequency transport system that includes a radio frequency antenna, a remote unit, and a host unit adapted to receive a signal from the remote unit...
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7570946 |
Method for determining the signal strength at the input of a tuner
The invention relates to a method for determining the strength of a signal ( 18 ) at the input of a tuner ( 1 a .) In this, the frequency-dependent amplification characteristic for the tuner is...
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7499020 |
Input system and input device
An input system includes an information generation part which generates input information based on a given input operation, a transmission part which transmits signals generated by having a...
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7412219 |
High-frequency amplifier having simple circuit structure and television tuner using high-frequency amplifier
A high-frequency amplifier includes first and second amplifying stages disposed in parallel for amplifying VHF/UHF television signals. The first amplifying stage includes a first FET and a second...
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7398104 |
Mobile phone with wireless camera detection
A mobile phone with wireless camera detection. A mobile phone converts the frequency band of a received signal to mobile signal frequency band (for example GSM, DSC or PCS) with added mixer,...
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7395037 |
Control system for controlling an output signal power level of a wireless transmitter
A method and system for controlling an output signal power level of a wireless transmitter can be created by detecting the signal power level of the transmitter with a detector, selectively...
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7376207 |
Apparatus for receiving and recovering frequency shift keyed symbols
A receiver architecture for receiving an FSK signal having a predetermined number of modulation levels includes a selectivity filter ( 206 ) for selectively passing a wanted channel and rejecting...
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7356311 |
Wireless audio signal and control signal device and method thereof
A signal transmission arrangement includes a signal transmitter and a signal receiver wirelessly communicating with the signal transmitter. The signal transmitter includes a hybrid signal device to...
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7299025 |
Harmonic rejection gated-switching mixer
Rejection of local oscillator harmonic response is provided in a mixing circuit with a pair of harmonic gating switches serially connected to the outputs of a balanced differential switching mixer...
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7231194 |
Localization of narrowband signals
The invention relates to detecting a narrowband signals from received signals. According to the different aspects of the invention, a sample set is first formed from received signals, whereby...
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7224980 |
Radio system
A stationary device 20 sends a portable-device finding signal to a portable device 10 from a plurality of stationary-device side antennae 24 and 25 , which are located at different...
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7224751 |
Device and method for checking whether a signal with a predetermined frequency is being received
A device and method are disclosed, whereby the normally complicated and difficult frequency determination is achieved by simply arranged and executed measures, namely by means of larger, smaller...
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7221918 |
Digital DC-offset correction circuit for an RF receiver
An RF receiver comprising a radio-frequency (RF) down-converter for receiving and down-converting an input RF signal to a lower frequency analog signal (e.g., an IF signal or baseband signal) and...
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7203472 |
Method and apparatus providing calibration technique for RF performance tuning
A method is disclosed for operating a RF receiver of a communications equipment, as is circuitry for implementing the method. The method includes, while operating under the control of a data...
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7184716 |
Low cost/low power analog transceiver architecture
A time division duplex (TDD) single sideband (SSB) transceiver includes a transmitter adapted to input an analog audio signal, sample the analog audio signal, and to output an SSB frequency shift...
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7181184 |
Band edge amplitude reduction system and method
A band edge amplitude reduction system changes the filtering characteristics of a receiver based on the amplitude of signal(s) adjacent to an edge of the operating band of the receiver and/or of...
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7107008 |
Validation of the presence of an electromagnetic transponder in the field of a phase demodulation reader
A terminal for generating an electromagnetic field adapted to communicating with at least one transponder, and a method for controlling such a terminal including: an oscillating circuit adapted to...
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7088951 |
Receiver, method thereof, program thereof, recording medium recording the program, and communication system
The system controller 12 attains program table data from a received electric wave upon turning on the power source. Program table data are rearranged for every ensemble and stored again. The user...
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7072629 |
Method for recording information transmitted over a radio frequency
A method for recording information that is transmitted over a radio frequency, especially traffic information, in which, in a monitoring state, the receiving device is supplied with power in a...
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7069042 |
Quadrature direct synthesis discrete time multi-tone generator
A tone generator in a transceiver of a communications device may generate an arbitrary signal using two shift registers to generate the time intervals. During each time interval, a different...
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7062228 |
Cellular communications system using baseband carrier injection and related methods
A cellular communications system may include one or more cellular base stations and a plurality of mobile cellular communications devices for communicating therewith. More particularly, the...
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7006807 |
Electronic broadcast radio skip protection
Transitory audio information that is subject to interruption is provided without loss of content. Transitory audio information received from an audio source is audibly provided until an interrupt...
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6993315 |
Super-regenerative microwave detector
A resonant tunneling diode or diode array oscillator ( 10 ) including a resonant diode ( 11 ) is coupled to a millimeter-wave source ( 14 ) and a quench generator ( 16 ) for periodically quenching...
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6915146 |
Method and apparatus for receiving a plurality of different codes at a plurality of different frequencies
A receiver capable of receiving a plurality of different codes at a plurality of different frequencies is set forth herein. The receiver offers digital frequency control by using a controller...
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6842498 |
Global positioning system interference detection
Systems and methods are described for a GPS receiver capable of functioning in the presence of interference. A method includes detecting an interfering signal including: tuning a band pass filter...
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6701131 |
International universal call progress analysis system
A call progress analysis system is provided which is generic to any telecommunications system with which it is used due to configurable detection parameters. A signal on a channel of the...
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6665350 |
Method and system for improved analog signal detection
A method and system for improved detection of analog signals, where the analog signals may be composed of one or more analog frequencies. In the method and system, an analog signal is received. A...
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6640093 |
Broadcast receiver
A receiver for broadcast signals, e.g. DAB, FM, DVB, and digital or analog short-wave RF broadcast signals according to the present invention includes a polyfunctional circuit ( 5 ) that can be...
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6625446 |
Information processor, method of information processing and program storing medium
An information processor, a method of information processing and a program storing medium that ensure radio data communication by further accurately showing wave condition to a user. A field...
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6512803 |
Global positioning system receiver capable of functioning in the presence of interference
Systems and methods are described for a GPS receiver capable of functioning in the presence of interference. A method includes detecting an interfering signal including: tuning a band pass filter...
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6415139 |
Detection circuit of tone signal
This invention intends to provide a tone signal detection circuit that accurately detects a tone signal regardless of a reception electric field strength. To accomplish this object, the tone signal...
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6373398 |
Automobile tuner system
In a receiver, either an FM/AM signal to be used for a keyless entry system or a high frequency signal to be used for an automobile audio system for FM broadcast is applied to a first converter. An...
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6310554 |
Severe weather detection apparatus and method of detecting and warning of severe weather conditions
A severe weather detection apparatus for detecting severe weather and method of detecting and warning of approaching severe weather conditions is provided. The severe weather detector apparatus...
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6308052 |
Half-duplex radios for indicating signal transmissions
A radio for a half-duplex communication system includes a warning circuit for indicating when a transmission of a signal is taking place. The radio includes a transceiver for providing a voice...
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6204761 |
Weather alert system
A weather alert system to warn a user when an emergency signal has been broadcast and to simultaneously activate a television or other visual information source and to select a predetermined...
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6175325 |
Multi-band microwave detector
A multi-band microwave detector includes an antenna, a plurality of reception systems connected to the antenna in a parallel arrangement, a judgement circuit for judging whether or not a microwave...
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6175324 |
Police radar detector
A novel frequency scheme for a police radar detector enables improved sweeping of the X, K, K u and K a radar bands. The novel frequency scheme requires two initial frequency conversions for...
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6169511 |
Radar detector
A radar detector is comprised of a voltage controlling oscillator (VCO) instead of DROs, thereby decreasing the cost of radar detector. The radar detector comprises a voltage controlled 1st local...
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6137406 |
Double superheterodyne type microwave detector capable of detecting leaked microwaves
A double superheterodyne type microwave detector is constructed from a reception antenna; a first local oscillator; a second local oscillator; reception means for detecting microwaves having...
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5939982 |
Apparatus for monitoring opening of sealed containers
Apparatus for monitoring opening of sealed enclosures, especially, but not exclusively, sealed containers containing goods-in-transit, such as goods vehicles, maritime containers or transport...
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5917441 |
Police radar detector for sweeping K and K.sub.A radar bands during one local oscillator sweep
A frequency scheme for a police radar detector enables the K band and the K a band to be scanned during a single sweep of a local oscillator which drives a mixer at its fundamental operating mode...
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5900832 |
Input stage for police radar detector including input signal preamplification
An input stage for a police radar detector includes a single mixer together with at least one preamplifier to detect radar signals in the X, K and K a bands. A preamplifier may be used on the X...
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5893056 |
Methods and apparatus for generating noise signals from speech signals
In methods and apparatus for generating an LPC-encoded noise signal from an LPC-encoded speech signal, excitation parameters of the LPC-encoded speech signal for a current frame are randomized upon...
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5856803 |
Method and apparatus for detecting radio-frequency weapon use
An apparatus for detecting abnormal radio-frequency signals has an antenna responsive to a radio-frequency signal. The radio frequency signal has a plurality of signal components, each of which has...
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5852417 |
Police radar detector including nuisance alert suppression
A radar detector suppresses nuisance alerts due to detection of a third harmonic of a common LO signal of other radar detectors by detecting a second harmonic of the offending LO signal. If a...
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5848362 |
Portable alerting unit for alerting a user to call arrival to portable radio apparatus
A synthesizer varies the receive frequency band so that a receiver can receive signals in the receive frequency band of the uplink incoming call channel of a portable telephone. A receiver...
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5835052 |
Radar detector and the adjustment system and method thereof
Disclosed is a radar detector for frequency sweeping a wide band range by using a VCO circuit to detect a radar signal, wherein the frequency precision of the received band can be improved by using...
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5781852 |
Alert receiver interface
This invention relates to an alert receiver interface, apparatus and method, for receiving and automatically detecting the issuance of emergency, weather or other alert messages broadcast on a...
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5781145 |
Motorcycle mounted radar/laser speed detection countermeasure device
A radar/laser speed detection countermeasure device for use on a motorcycle is disclosed which detects and annunciates radar and/or laser based speed detection devices in use in the immediate...
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