Celebrity Inventors
Glam girl Heddy Lamar may have used her good looks to good effect on the silver screen, but she put her smarts to better use as an inventor. During World War II, she co-patented a frequency-switching system for torpedo guidance that was considered years ahead of its time.
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 |
| 8190113 | Dual receive filter A stage is provided for a receiver of a wireless device. The stage comprises a matching network that separates amplified signals of interest received from an amplifier from amplified unwanted signals received from the amplifier in conjunction with additional downstr... | 05/29/2012 |
| 7970370 | Signal conversion apparatus and signal conversion method A signal conversion apparatus includes a local oscillator for locally generating a signal having a frequency, a phase shifter for shifting the phase of the locally generated signal output from the local oscillator by an amount determined based on a relationship betw... | 06/28/2011 |
| 7904047 | Radio frequency filtering technique with auto calibrated stop-band rejection Methods, systems, and apparatuses for filtering received radio frequency signals are provided. A first RF communication signal is received that includes a desired information signal portion and an undesired blocker signal portion that is offset in frequency from the... | 03/08/2011 |
| 7711344 | Network-based subscriber calling restrictions Methods and systems are provided that enable communication with a wireless device. In one such method, a communication event that is intended for a wireless device is detected and a user account associated with the wireless device is identified. Information associat... | 05/04/2010 |
| 7567790 | Receiving device and integrated circuit for reception In order to improve various characteristics of a receiving circuit for digital radio services, circuits are provided for forming two local oscillation signals, whose frequencies are both the center frequency between a first ensemble and a second ensemble, and whose ... | 07/28/2009 |
| 7522900 | DC offset correction for use in a radio architecture A method and apparatus for determining a delay vector from inputs of in-phase and quadrature phase low pass filters to an output of the demodulator of a dual mixer radio receiver and from such delay measurement computing and providing DC offset correction to said re... | 04/21/2009 |
| 7433666 | Dual receive filter A pre-processing stage is provided for a receiver of a wireless device. The pre-processing stage includes an amplifier that receives signals of interest and unwanted signals and produces amplified signals of interest and amplified unwanted signals, and a matching ne... | 10/07/2008 |
| 7400872 | Radio receiver for selecting appropriate diversity antennas by comparing correlation values and a method for the same In the diversity receiver, the RF switcher switches the received signals to supply them to the RSSI power detector equipped with diversity function. Subsequently, the RSSI power detector with diversity function feeds the RF switcher with an antenna switching signal.... | 07/15/2008 |
| 7392031 | Method for cancelling a narrow-band interference signal A method of canceling a narrow-band interference signal in a receiver is provided. A reference signal (ref_in) is subtracted from a received input signal (in). the phase of a result of the subtraction is calculated on the basis of an arctangent function. An unwrap f... | 06/24/2008 |
| 7375741 | Circuit and method for eliminating image interfering with desired channel A circuit and a method for eliminating interference introduced from an image channel into a desired channel is described. The circuit includes a splitter and an adder. The splitter generates signals split from a received signal having frequency components within the... | 05/20/2008 |
| 7373130 | Simultaneous channel estimation of a carrier and an interferer Interference suppression in a receiver in a wireless network that utilizes training sequences for synchronization and channel estimation, wherein the training sequence of an interfering channel overlaps the training sequence of a desired channel to cause degraded ch... | 05/13/2008 |
| 7373127 | Digital beam forming for communications systems An antenna-receiver communications system and method is provided to mechanize multibeam mobile antenna-receive subsystems. Digital beam forming for modern wideband mobile communications systems is provided. In an aspect, subsystems can simultaneously receive, acquir... | 05/13/2008 |
| 7369834 | Impedance-matched IQ network for an image rejection circuit An impedance-matched IQ network includes a phase shift circuit and a back termination. The phase shift circuit includes an in-phase mixer port for receiving the in-phase signal, a quadrature-phase mixer port for receiving the quadrature phase signal, a termination p... | 05/06/2008 |
| 7363016 | Diversity receiving apparatus and method A communication system comprises a first signal adjusting unit for amplifying a first signal received by a first antenna; a second signal adjusting unit for amplifying and phase-shifting a second signal received by a second antenna to generate a phase-shifted signal... | 04/22/2008 |
| 7362826 | Receiver including an oscillation circuit for generating an image rejection calibration tone A receiver circuit includes an oscillator circuit configured to generate a calibration tone and a phase locked loop (PLL) reference signal. An output frequency of the VCO may be divided by respective amounts to derive a desired calibration tone frequency and a desir... | 04/22/2008 |
| 7346480 | Impedance mismatch modeling in a data flow or discrete time based system simulation This invention provides directional connectivity described by the interconnections of the blocks in the schematic or netlist that are used to propagate impedance data from one block to another. The propagation of impedance data for discrete time based simulation pro... | 03/18/2008 |
| 7340232 | Receiving system and semiconductor integrated circuit device for processing wireless communication signal The invention provides a receiving system and a transmitting system capable of decreasing an offset between differential signals and between quadrature signals and improving a manufacturing yield and a semiconductor integrated circuit device for processing a wireles... | 03/04/2008 |
| 7336940 | Frequency conversion techniques using antiphase mixing A frequency upconverter using mixers operating on one or more signals and inverted versions thereof and a subtractor, such as a balun, for subtractively combining the mixer outputs to produce an upconverted signal. ... | 02/26/2008 |
| 7321735 | Optical down-converter using universal frequency translation technology A method and system for converting an optical signal to electrical information signals, including demodulated baseband information signals and modulated baseband signals at multiple harmonics. In an embodiment, the optical information signal is amplitude modulated w... | 01/22/2008 |
| 7315728 | Polarized wave measuring apparatus, and antenna characteristic measuring apparatus and radio wave measuring apparatus using the same A phase shift section phase-shifts the second band-restricted signal to a first phase-shifted signal and a second phase-shifted signal having a phase that is different from the phase of the first phase-shifted signal by 90 degrees. A first signal mixing section mixe... | 01/01/2008 |
| 7295826 | Integrated frequency translation and selectivity with gain control functionality, and applications thereof Methods and apparatuses for frequency selectivity and frequency translation, and applications for such methods and apparatuses, are described herein. The method includes steps of filtering an input signal, and down-converting the filtered input signal. The filtering... | 11/13/2007 |
| 7292835 | Wireless and wired cable modem applications of universal frequency translation technology Frequency translation and applications of same are described herein, including cable modem applications. Such applications include, but are not limited to, frequency down-conversion, frequency up-conversion, enhanced signal reception, unified down-conversion and fil... | 11/06/2007 |
| 7277675 | Array for the contact-less transmission of electrical signals or energy The invention is characterized by the provisions that each transmitter comprises an AC voltage or current source, respectively, as well as a plurality of inductive coupling elements supplied from said source, which elements are supplemented by at least one capacitor... | 10/02/2007 |
| 7266356 | Mobile communication terminal apparatus and mobile communication method A mobile communication terminal apparatus includes an antenna unit configured to select antenna radiation characteristics, and receives a first signal transmitted from transmitting station according to the selected antenna radiation characteristic, a transmitter whi... | 09/04/2007 |
| 7263344 | Method for reducing IM2 noise in a down conversion circuit The present invention relates generally to communications, and more specifically to a method and apparatus for minimizing DC offset and second-order modulation products (IM2 noise) while demodulating RF signals. The principle of the invention can be applied to diffe... | 08/28/2007 |
| 7254379 | RF receiver mismatch calibration system and method A calibration system for an RF system that includes an RF receiver capable of operating in a normal mode and in a calibration mode. The calibration system includes a phase delay unit provided on at least one of an I channel output and a Q channel output of the RF re... | 08/07/2007 |
| 7242918 | Current driven polyphase filters and method of operation A filter circuit includes a polyphase filter coupled to a first circuit component and a second circuit component. The first circuit component propagates four input current signals to the polyphase filter. The third and fourth input current signals are substantially ... | 07/10/2007 |
| 7236750 | Techniques for correcting for phase and amplitude offsets in a MIMO radio device Techniques to correct for phase and amplitude mismatches in a radio device in order to maintain channel symmetry when communicating with another device using MIMO radio communication techniques. Correction for the amplitude and phase mismatches among the plurality o... | 06/26/2007 |
| 7233368 | Down-converter A down-converter for processing frequency signals, preferably received, particularly digital, television signals, comprising two, preferably identical mixer stages (10a, 10b) for down-converting the signal, a local oscillator (12) ... | 06/19/2007 |
| 7231151 | Cosite interference rejection system using an optical approach A cosite interference rejection system allows cancellation of large interfering signals with an optical cancellation subsystem. The rejection system includes an interference subsystem coupled to a transmit system, where the interference subsystem weights a sampled t... | 06/12/2007 |
| 7231192 | High frequency receiver A high frequency receiver of the present invention has a mixer of which one input part is connected to an output part of a filter and the other input part is connected to an output part of a frequency-variable local oscillator, and an output terminal connected to an... | 06/12/2007 |
| 7209725 | Analog zero if FM decoder and embodiments thereof, such as the family radio service A method and system for directly down-converting FM signals to demodulated baseband information signals that can be used to directly down-convert analog FM signals and digital FM signals to demodulated baseband information signals. In an embodiment, the method inclu... | 04/24/2007 |
| 7205865 | Power divider and combiner in communication system Disclosed is a high frequency omni-directional 2-way power divider which includes one input terminal and two output terminals so that a signal inputted through the input terminal is uniformly distributed to the two output terminals. The high frequency omni-direction... | 04/17/2007 |
| 7203068 | Electronic apparatus An electronic apparatus according to the present invention includes two modules which decode high frequency analog signals. Furthermore, each of the modules is provided with an RF section at a position away from the center of the module in either longitudinal direct... | 04/10/2007 |
| 7197293 | Absorbing sum signal energy in a mixer A frequency mixer that generates out of phase sum signals and uses the out of phase relationship to absorb sum signal energy in an energy absorbing component. A frequency mixer according to the present teachings includes a set of mixing devices that generate a first... | 03/27/2007 |
| 7167716 | Synchronous demodulation apparatus of base transceiver station in interim standard-2000 system The present invention provides a synchronous demodulation apparatus of a base transceiver station in an Interim Standard-2000 (IS-2000) system, including a first synchronous demodulation unit, a received signal delay unit, an interference signal regeneration unit an... | 01/23/2007 |
| 7164329 | Tunable phase shifer with a control signal generator responsive to DC offset in a mixed signal The present invention provides a phase shifting filter and a phase compensating direct downconversion receiver. A DC offset detector detects a DC offset in a received baseband signal and provides a feedback signal. A tunable filter phase shifts a local oscillator si... | 01/16/2007 |
| 7149493 | Direct conversion receiver employing subharmonic frequency translator architecture and related preprocessor A direct conversion receiver for receiving a first input signal and directly downconverting it to baseband frequencies. The receiver includes a frequency translator which is responsive to a phase-split input signal having 2n components, wherein n is an integer great... | 12/12/2006 |
| 7138849 | Phase mixer that compensates for frequency variations and PVT variations and a control method thereof Provided is a phase mixer that compensates for frequency variations and process, voltage, and temperature (PVT) variations, and automatically controls slew rates of input signals according to frequency variations and PVT variations. The phase mixer includes: a mixer... | 11/21/2006 |
| 7139324 | Closed loop feedback system for improved down link performance A method includes receiving at least two space-time coded signals from an antenna system associated with a first station, determining complex channel state information based on the received space-time coded signals, and sending the complex channel state information ... | 11/21/2006 |
