Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7929929 | Method and apparatus for spur reduction in a frequency synthesizer A frequency synthesizer includes: a frequency source generating a reference signal that includes a plurality of pulses having periodicity based on a reference frequency; a feedback loop that includes, a phase detector circuit, a loop filter, a controlled oscillator ... | 04/19/2011 |
| 7817975 | Wireless communication system, wireless communication terminal, and wireless communication method A wireless communication system includes: a base station; a first wireless communication terminal that receives a first signal from the base station; and a second wireless communication terminal that receives a second signal from the base station. The first signal i... | 10/19/2010 |
| 7551906 | AM/FM radio receiver and local oscillator circuit used therein A couple of frequency doubler circuits 21 and 22 which multiplys a frequency of a reference oscillation signal outputted from a reference oscillator 12 is provided, thereby a frequency of a reference oscillation signal, as the greatest common di... | 06/23/2009 |
| 7447487 | Method for controlling channel re-selection A method for re-selecting control channels in a mobile station reduces the use of resources by limiting an evaluation of candidate control channels to those channels which satisfy certain criteria and are deemed to be eligible control channels. As a consequence, res... | 11/04/2008 |
| 7433414 | Intelligent array radio architecture A receiver sets weights for an antenna array according to a series of algorithms including an energy algorithm, a least squares algorithm and a least mean square algorithm. ... | 10/07/2008 |
| 7424271 | Multi-mode and multi-band RF transceiver and related communications method A multimode communications system includes a first communications module, a transmission module, a switch and a second communications module. The first communication module has a frequency modulator for modulating a dividing ratio to adjust an oscillating signal and... | 09/09/2008 |
| 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 |
| 7415255 | Scanning receiver With the objective of providing a scanning receiver capable of capturing a target radio wave in an extremely short period of time by use of a simple constituting means, a plurality of wide frequency division bands in which a full frequency range is divided into pred... | 08/19/2008 |
| 7398071 | Loop filter with gear shift for improved fractional-N PLL settling time An integrated circuit radio frequency (RF) transmitter includes a phase locked loop having a multi-mode loop filter that is operable to provide wide band response with a fast settle time in a startup mode of operation and a relatively more narrow response with a lon... | 07/08/2008 |
| 7394874 | Up/down conversion circuitry for radio transceiver A multi-channel RF receiver uses an image rejection mixer (e.g. double quadrature mixer) in the IF down conversion stage for image side band rejection (whereby use of an IF narrow band filter for image rejection may be omitted if desired) and comprises a simplified ... | 07/01/2008 |
| 7386286 | High frequency low noise phase-frequency detector and phase noise reduction method and apparatus The present invention discloses a new type of extremely low-noise phase-frequency detector (PFD) 500, broadband from DC to multi-GHz RF frequencies for PLL synthesizer applications. Free of any feedback mechanisms, thus inherently fast, it operates close to t... | 06/10/2008 |
| 7324789 | PLL frequency synthesizer architecture for low phase noise and reference spurs A frequency synthesizer for use in a transceiver generates a relatively high reference frequency with fine frequency resolution and low in-band phase noise by using a digital processor to generate a digital reference signal at a finely-tuned reference frequency. A D... | 01/29/2008 |
| 7302237 | Wideband signal generators, measurement devices, methods of signal generation, and methods of signal analysis A wideband signal generator according to one embodiment of the invention includes a variable frequency source and a direct digital synthesizer. Local oscillators, signal analyzers, modulators, demodulators, and other equipment including one or more such generators a... | 11/27/2007 |
| 7292649 | 3G radio A homodyne receiver is provided for receiving GSM and UMTS transmissions. The receiver may also be used for other transmission schemes. The receiver includes an electronically reconfigurable low pass filter and an off set generator for providing DC offset correction... | 11/06/2007 |
| 7263341 | Audio demodulating circuit and television broadcast receiver An audio demodulating circuit in accordance with the present invention for demodulating audio signals in a plurality of broadcast systems of mutually different frequency deviations such as the NTSC and the PAL, is arranged such that a connection between a trap circu... | 08/28/2007 |
| 7231196 | Method and apparatus for fractional-N synthesis A method and apparatus for fractional-N synthesis includes processing that begins by generating a 1st feedback frequency from the output frequency based on a fixed divider value. The processing continues by generating a 2nd feedback frequency f... | 06/12/2007 |
| 7215931 | Method and apparatus for up-and-down-conversion of radio frequency (RF) signals This patent describes a method and system which overcomes the LO-leakage problem during modulation and demodulation, common to direct conversion and similar RF transmitters and receivers. This problem is solved using a virtual local oscillator (VLO™) signal which ... | 05/08/2007 |
| 7194044 | Up/down conversion circuitry for radio transceiver A multi-channel RF receiver uses an image rejection mixer (e.g. double quadrature mixer) in the IF down conversion stage for image side band rejection (whereby use of an IF narrow band filter for image rejection may be omitted if desired) and comprises a simplified ... | 03/20/2007 |
| 7181181 | Multi-band transceiver for a wireless communication system A local oscillation signal generator and a multi-band transceiver including the local oscillation signal generator are provided. The multi-band transceiver includes a fractional-N phased locked loop (PLL), a local oscillation signal generator, and a transmitter. The... | 02/20/2007 |
| 7174145 | Method and apparatus for automatic channel search The invention reduces the time required for automatically searching for channels on a device receiving channels of various widths. The invention proposes a channel detection process which carries out successive passes with frequency spacings corresponding to channel... | 02/06/2007 |
| 7164651 | Wireless computer network including a mobile appliance containing a single chip transceiver A wireless computer data network includes several untethered mobile units that make ad-hoc data connections with an Internet-connected base station using the IEEE-802.11a standard. Each unit includes a radio transceiver fully integrated on a single semiconductor chi... | 01/16/2007 |
| 7158760 | Frequency synthesizer with selectable preconfigured synthesizer characteristics A system and method are disclosed for configuring a frequency synthesizer in a transceiver. Configuring a frequency synthesizer in a transceiver includes specifying a selection bit sequence wherein the selection bit sequence corresponds to a predetermined combinatio... | 01/02/2007 |
| 7149485 | Method and device for processing mismatches between two quadrature paths of a chain of a reception adapted for example to the reception of a signal modulated according to a modulation of the OFDM type In a calibration phase for a tuner of the DZIF type, N calibration frequency signals are generated at an input of a filter. The N calibration frequency signals have N calibration frequencies corresponding respectively after transposition to N analysis frequencies at... | 12/12/2006 |
| 7127351 | Combined parallel and sequential detection for GPS signal acquisition A two part signal acquisition process includes a parallel signal detection process and signal verification/false alarm rejection process. A massively parallel architecture of acquisition correlators search a large region of the time-frequency uncertainty during the ... | 10/24/2006 |
| 7127225 | Accumulator controlled prescaler in a phased locked loop A wireless local area network transceiver, an integrated circuit chip, a PLL (Phase Locked Loop) device and a method are provided that may reduce influences of switching noise. The frequency of an output signal of the PLL device is divided in a prescaler of the PLL ... | 10/24/2006 |
| 7107033 | Smart radio incorporating Parascan® varactors embodied within an intelligent adaptive RF front end A smart radio incorporating Parascan® varactors embodied within an intelligent adaptive RF front end. More specifically, this is provided for by a smart radio incorporating Parascan® varactors embodied within an intelligent adaptive RF front end that comprises at ... | 09/12/2006 |
| 7099638 | Method and apparatus for receiving an amplitude modulated radio signal Receiving apparatus (1) for receiving an amplitude modulated signal which may be transmitted on a plurality of frequency channels within a predetermined frequency bandwidth comprises a tuner (3) for sequentially scanning through the channels under the ... | 08/29/2006 |
| 7064617 | Method and apparatus for temperature compensation Temperature compensation is achieved by adjusting a divide ratio of a multi-modulus divider circuit in a feedback path of a phase-locked loop based on the detected temperature. The divide ratio is adjusted based on stored adjustment values stored in non-volatile mem... | 06/20/2006 |
| 7062271 | Cell selection method of mobile terminal A system and method for managing communications in a mobile terminal selects a serving cell of a first PLMN for the mobile terminal, monitors signal strengths of neighboring cells in at least a second PLMN, classifies the neighboring cells as signal-receivable cells... | 06/13/2006 |
| 7061855 | Wireless computer network including a mobile appliance containing a single chip transceiver A wireless computer data network includes several untethered mobile units that make ad-hoc data connections with an Internet-connected base station using the IEEE-802.11a standard. Each unit includes a radio transceiver fully integrated on a single semiconductor chi... | 06/13/2006 |
| 7043211 | Universal modulator A modulator generates a combined signal consisting of audio and video signals and converts the combined signal to one of a plurality of frequencies in dependence upon a desired output frequency and broadcast standard. The modulator includes a summing amplifier, a fi... | 05/09/2006 |
| 7039437 | Internal broadcast reception system for mobile phones An integrated reception system for use in a mobile phone for receiving FM/digital broadcast signals. The reception system, which is installed within the phone body, includes a substrate, an antenna having a meandering pattern disposed on the substrate for receiving ... | 05/02/2006 |
| 7034624 | Digitally-realized signal generators and methods Signal generators are realized with combinations of a digital synthesizer (e.g., direct digital synthesizer), a frequency controller and a phase controller. The frequency controller receives a user-provided minimum count of a reference frequency wherein the minimum ... | 04/25/2006 |
| 7027827 | Method and apparatus for channel sharing between multiple communication systems Remote units within a first communication system (121) utilizes frequencies (channels) from a second communication system (120) when placing a call. When a first remote unit (106) wants to call a second remote unit (107) using the channel... | 04/11/2006 |
| 6992513 | Frequency divider system A frequency divider circuit for providing a divided clock signal having a frequency that is an odd integer factor less than the frequency of an incoming system clock signal. The frequency divider includes a clock generator circuit coupled to a delay circuit which op... | 01/31/2006 |
| 6993307 | Method and apparatus for operating a PLL with a phase detector/sample hold circuit for synthesizing high-frequency signals for wireless communications A method and apparatus for synthesizing high-frequency signals, such as wireless communication signals, includes a phase-locked loop (PLL) frequency synthesizer with a variable capacitance voltage controlled oscillator (VCO) that has a discretely variable capacitanc... | 01/31/2006 |
| 6985701 | Frequency synthesizer and multi-band radio apparatus using said frequency synthesizer There is disclosed a frequency synthesizer having an HF synthesizer for generating a first reference frequency signal having a variable frequency in a high-frequency band as a unit synthesizer, an LF synthesizer for generating a second reference frequency signal in ... | 01/10/2006 |
| 6919243 | Methods of forming an integrated circuit capacitor in which a metal preprocessed layer is formed on an electrode thereof An integrated circuit capacitor is manufactured by forming a lower electrode on a substrate and forming a metal preprocessed layer on the lower electrode using chemical vapor deposition in which a metal precursor is used as a source gas and the metal precursor compr... | 07/19/2005 |
| 6891420 | Method and apparatus for digital frequency synthesis A digital frequency synthesizer includes one or more reference clocks (104, 1316, 1502A, 1504A, 1506A) optionally coupled through one or more pulse width reducers (106) to one or more main delay lines (108, 702, 1502B, 1504B... | 05/10/2005 |
| 6888580 | Integrated single and dual television tuner having improved fine tuning Improved television tuning circuits are disclosed. An example tuning circuit includes a fraction-N frequency synthesizer facilitating fine tuning. This tuning circuit may be formed using relatively few independent oscillators. The tuning circuit lends itself to the ... | 05/03/2005 |
