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| Number | Title | Issue Date |
| 8275334 | Remote detection of electronic devices An apparatus and method for detecting solid-state electronic devices are described. Non-linear junction detection techniques are combined with spread-spectrum encoding and cross correlation to increase the range and sensitivity of the non-linear junction detection a... | 09/25/2012 |
| 8170515 | Method and apparatus for the phased detection of a signal including a frequency deviation detection phase A plurality of phases of sniff operations are performed for detecting wake-up signals being received by an implantable medical device (IMD), including a phase that performs a staged detection of whether the integrated frequency deviation of a received signal is outs... | 05/01/2012 |
| 8131239 | Method and apparatus for remote detection of radio-frequency devices Methods and apparatus for detecting the presence of electronic communications devices, such as cellular phones, are disclosed. In an exemplary method, a complex radio frequency stimulus is transmitted into a target area, and nonlinear reflection signals received fro... | 03/06/2012 |
| 8086200 | Radio communications system designed for a low-power receiver The invention relates to methods by which radio signals can be transmitted to, and received by, a radio receiver such that the receiver consumes very little power from a battery or energy source. The invention is applicable not only to medical implants, but any appl... | 12/27/2011 |
| 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 FET of a grounded-gate type connected in series between a common input... | 08/12/2008 |
| 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, oscillator, and filter. The converted signal is treated as a mobile signal ... | 07/08/2008 |
| 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 attenuating the output signal power level with an attenuator having variable... | 07/01/2008 |
| 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 unwanted channels. The selectivity filter has a filter bandwidth ... | 05/20/2008 |
| 7358855 | Local area warning system (laws) The present invention provides a local area warning system that is designed to alert the public of severe weather and technological alerts. The apparatus consists of red, amber, and blue warning lights and audio speakers that warn the public of the severe conditions... | 04/15/2008 |
| 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 hybridize the audio signal with the control signal to form a consoli... | 04/08/2008 |
| 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 and controlled by a gate clock signal having twice the frequency of a... | 11/20/2007 |
| 7263330 | 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 being excited by a remote supply signal of the transponder; a phase d... | 08/28/2007 |
| 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 elements of the sample set represent their absolute values, and a lower re... | 06/12/2007 |
| 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 positions. Upon receipt of the portable-device finding sig... | 05/29/2007 |
| 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 and/or equal comparisons and a counting of certain events. The inventio... | 05/29/2007 |
| 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 analog processing circuitry for receiving the lower frequency analog s... | 05/22/2007 |
| 7218708 | Internet facilitated emergency and general paging system A plurality of displaced paging systems can be controlled from a common paging facility via a computer network such as the Internet. Real-time streaming audio can be transmitted, via the network to one or more identified facilities and/or zones and broadcast therein... | 05/15/2007 |
| 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 processor of the communications equipment, generating a calibration signal;... | 04/10/2007 |
| 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 keyed (FSK) signal corresponding to the analog audio signal, the SSB F... | 02/27/2007 |
| 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 signals not under the power control of the receiver. For example, the r... | 02/20/2007 |
| 7177606 | 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 attenuating the output signal power level with an attenuator having variable... | 02/13/2007 |
| 7142126 | Cargo container having an audio system Disclosed is a cargo container having an audio system, which is capable of broadcasting music and safety regulations for workers when they load or unload freight in or from the cargo container. An audio system is fixed to an inner surface of a corrugated wall of the... | 11/28/2006 |
| 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 being excited by a remote supply signal of the transponder; a phase d... | 09/12/2006 |
| 7088254 | System and method for providing a device with protection from a weather event The present invention is directed to a system and method for providing a device with protection from a weather event. A method for providing a device with protection from weather events may include receiving a notification of a weather event. At least one weather ch... | 08/08/2006 |
| 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 makes an input operation to set a channel-feed selection which ... | 08/08/2006 |
| 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 clocked manner. While switched on, the receiving device is tuned to a pre... | 07/04/2006 |
| 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 capacitor is switched onto the node to change the voltage potential on that... | 06/27/2006 |
| 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 cellular base station and the mobile cellular communications devices may eac... | 06/13/2006 |
| 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 signal is received. The transitory audio information is buffered while... | 02/28/2006 |
| 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 the oscillations so that the average oscillation ... | 01/31/2006 |
| 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 driven signal diode to add or remove capacitance to or from a band pass fi... | 07/05/2005 |
| 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 over a frequency range; and at each of a plurality of incremental freq... | 01/11/2005 |
| 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 telecommunications system is detected in intervals of changing frequ... | 03/02/2004 |
| 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 stream of data samples is created from the analog signal. B... | 12/16/2003 |
| 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 switched into three modes and performs the digital frequency de... | 10/28/2003 |
| 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 intensity level showing screen to be displayed in plural levels ... | 09/23/2003 |
| 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 over a frequency range; and at each of a plurality of incre... | 01/28/2003 |
| 6487240 | Apparatus for receiving and recovering frequency shift keyed symbols A receiver architecture includes a selectivity filter (206) for selectively passing a wanted channel and rejecting unwanted channels. The selectivity filter has a filter BT of about one-half the BT of the transmitter filter. A discriminator (208) is coupl... | 11/26/2002 |
| 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 detection circuit according to the invention is comprised... | 07/02/2002 |
| 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 IF limiter amplifier amplifies the output signal of the c... | 04/16/2002 |
