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| Number | Title | Issue Date |
| 8180310 | Filtering using impedance translator This disclosure relates to low noise amplifiers (LNAs) and more particularly to LNAs integrated on integrated circuit (IC) chips along with radio frequency (RF) amplifiers. ... | 05/15/2012 |
| 8160532 | Community interaction using mobile communication devices Techniques are provided for delivering content to mobile communication devices related to interactions of members with a user community. The method involves detecting a communication session involving a mobile communication device; determining one or more context pa... | 04/17/2012 |
| 8116716 | Mobile wireless communications device having buffered clock distribution network for microprocessor and RF circuits A mobile wireless communications device includes a circuit board carried by a housing. A microprocessor, RF transceiver and circuitry are carried by the circuit board and operative with each other. Clock buffer circuitry is carried by the circuit board and connected... | 02/14/2012 |
| 8019309 | Method and system for a second order input intercept point (IIP2) calibration scheme In RF transceivers, a method and system for a second order input intercept point (IIP2) calibration scheme are provided. Transceiver calibration schemes to compensate for DC offsets produced by interfering signals may be performed during production testing or field ... | 09/13/2011 |
| 7949323 | Local oscillator leakage counterbalancing in a receiver The present invention provides a local oscillator (LO) leakage controller for use with a receiver. In one embodiment, the LO leakage controller includes a comparison unit configured to process an LO leakage error signal from the receiver to provide a leakage cancell... | 05/24/2011 |
| 7912438 | Method and apparatus for mitigating phase noise Techniques for mitigating additional phase noise in local oscillator (LO) signals, which may be due to digital noise coupling, are described. A correction signal having an estimate of additional phase noise in an LO signal is derived. The correction signal is applie... | 03/22/2011 |
| 7885630 | Mobile wireless communications device having buffered clock distribution network for microprocessor and RF circuits A mobile wireless communications device includes a circuit board carried by a housing. A microprocessor, RF transceiver and circuitry are carried by the circuit board and operative with each other. Clock buffer circuitry is carried by the circuit board and connected... | 02/08/2011 |
| 7747238 | Wireless communication device and data interface A wireless communication device comprises a number of sub-systems operably coupled to a data interface for routeing data between the number of sub-systems. A clock generation function generates a clock signal substantially at a data transfer rate to be used over the... | 06/29/2010 |
| 7424278 | Low IF mixer with improved selectivity performance A low IF mixer and method for down-converting a signal at a desired frequency are disclosed with improved selectivity performance. The energy of sidebands on each side of the desired frequency is evaluated; and a local oscillator frequency is selected based on the e... | 09/09/2008 |
| 7412221 | Crosstalk reduction method, apparatus, and system A data driver drives a data signal on a channel, and a current mode driver drives a varying current on the channel to reduce crosstalk. ... | 08/12/2008 |
| 7366489 | Mobile communication apparatus A transceiver suitable for larger scale of integration employs direct conversion reception for reducing the number of filters. Also, the number of VCOs is reduced by utilizing dividers to supply a receiver and a transmitter with locally oscillated signals at an RF b... | 04/29/2008 |
| 7336938 | Phase-alternating mixer with alias and harmonic rejection Rejection of local oscillator alias response is provided in a mixing circuit by (1) a switching mixer producing an output that changes at least twice between two states (e.g., high-low-high or low-high-low) during each local oscillator period, and (2) a charge integ... | 02/26/2008 |
| 7313379 | Generation of a self-correcting local oscillation A method and apparatus for generating a self-correcting local oscillation includes processing that begins by generating a frequency correction signal that represents undesired tones introduced by the self-correcting local oscillation. The processing continues by gen... | 12/25/2007 |
| 7313376 | DC offset correction for a wireless communication system A system and method for performing DC offset correction in a wireless communication receiver during “dead time” are provided. The receiver includes amplifier circuitry that amplifies a received radio frequency (RF) signal, downconversion circuitry that downconve... | 12/25/2007 |
| 7289167 | Television tuner including distribution connectors A metal frame body has first to fourth side plates and is divided, by a shield plate provided in the metal frame body, into a first compartment area near the first side plate and a second compartment area near the second side plate. A distributor is arranged in the ... | 10/30/2007 |
| 7268836 | Television tuner device generating intermediate-frequency signal free from harmonic interference of reference signal A television tuner device includes a metal frame, including a shielding plate which separates the space defined by the metal frame into a first chamber at a first side plate and a second chamber at a second side plate opposite to the first side plate; a distribution... | 09/11/2007 |
| 7260373 | Direct conversion receiver In a direct conversion receiver, to cancel a DC offset generated in the baseband processing block, negative feedback arrangements comprising a gain control amplifier and a low-pass filter are respectively attached to the I and Q signal branches of the baseband block... | 08/21/2007 |
| 7254380 | Low flicker noise current-folded mixer The current-folded mixer of this invention comprises an input stage and a switching stage. The input stage receives a radio frequency input RF and generates a modulated bias current to the switching stage. The switching stage has a switching pair, connected to a com... | 08/07/2007 |
| 7251468 | Dynamically matched mixer system with improved in-phase and quadrature (I/Q) balance and second order intercept point (IP2) performance A dynamically matched mixer system (200) for use in a direct conversion radio frequency (RF) receiver includes a frequency generator (201, 203, 205) that includes plurality of dividers (407) for providing differential local oscillator reference ... | 07/31/2007 |
| 7251465 | Method and apparatus for producing mobile radio signals A method and device are provided for producing mobile radio signals, which utilize a direct conversion receiver, at least one first and one second local oscillator and one regenerative divider for processing signals according to different mobile radio standards. For... | 07/31/2007 |
| 7248848 | Communication apparatus including dual timer units A communication apparatus includes a radio frequency circuit that operates on a radio frequency signal and a digital processing circuit coupled to the radio frequency circuit. The digital processing circuit includes a first timing circuit that provides timed signals... | 07/24/2007 |
| 7224950 | Estimating GPS reference frequency drift from PDC-handset VCO-bursts A combination mobile phone and navigation satellite receiver comprises a circuit for correcting GPS receiver reference frequency drift by using VCO burst information periodically received by a PDC handset. A corrected GPS receiver reference frequency drift then enab... | 05/29/2007 |
| 7224749 | Method and apparatus for reducing re-radiation using techniques of universal frequency translation technology Methods, systems, and apparatuses for down-converting an electromagnetic (EM) signal by aliasing the EM signal, and applications thereof are described herein. Reducing or eliminating DC offset voltages and re-radiation generated when down-converting an electromagnet... | 05/29/2007 |
| 7209767 | Cellular phone suppressing degradation of receiving sensitivity A cellular phone includes a radio circuit block, and a control block including a CPU for controlling operations of the cellular phone and treating data for the cellular phone. The control block retains an interrupt signal when the radio circuit block receives a radi... | 04/24/2007 |
| 7197329 | Wireless communication apparatus, cordless telephone, display operation control method, program, and storage medium There is provided a wireless communication apparatus, which is capable of suppressing a burst noise emitted due to data transfer during wireless communication, thereby enhancing communication quality. The wireless communication apparatus transmits and receives a spe... | 03/27/2007 |
| 7164895 | Antenna tuned circuit for a superheterodyne receiver A multi-band receiver in which characteristics including a tracking error are improved is provided with a variable frequency oscillator circuit, a variable divider circuit (39) for dividing an oscillation signal (SVCO) of the variable frequency oscillator cir... | 01/16/2007 |
| 7164896 | Method for driving a receiver stage and respective apparatus Whenever the oscillator frequency is a fraction or a multiple of the received frequency, another received frequency could in turn be there, which would then work as a kind of received disturbance frequency, and thus oscillator pulling occurs, which then severely imp... | 01/16/2007 |
| 7164901 | DC offset-free RF front-end circuits and systems for direct conversion receivers A DCR RF front-end removes the DC term resulting from mixer port to port leakage and feeds RF and LO signals into the mixers with different phase combinations. The signal inputs to the mixers result in the intermediate frequency (IF) output of mixers being 180 degre... | 01/16/2007 |
| 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 |
| 7146199 | Cordless digital audio headphone A cordless digital audio headphone is disclosed. The headphone includes a pair of earphones connected to a headband. The earphones provide audible signals. The headphone also includes a memory unit positioned on the headband for containing digitally stored audio inf... | 12/05/2006 |
| 7133656 | Direct conversion receiver A direct conversion receiver is disclosed wherein a received RF signal is mixed in a mixer with a local oscillation signal having a frequency the same as a desired central frequency, and is down-converted to a base band signal. The receiver comprises a divider for d... | 11/07/2006 |
| 7129994 | Television tuner having level of harmonics of oscillation signal suppressed low The level of the harmonics of oscillation signals for synchronous detection to be inputted to a mixer circuit for converting frequencies is suppressed low. A first integrated circuit component formed with a first mixer circuit for converting frequencies; a second in... | 10/31/2006 |
| 7129854 | Electronic device with force sensing key An electronic device with a force sensing key (200) has a switch (280), a first force sensing region (290) for acquiring a first force value, a second force sensing region (290) for acquiring a second force value, and a processor for dete... | 10/31/2006 |
| 7120407 | Receiver and its tracking adjusting method A receiver such that the period required for tracking adjustment, temperature compensation is not needed, and tracking errors due to fluctuation of the power supply voltage are prevented from increasing, and a tracking adjusting method for the receiver. A DAC 4 | 10/10/2006 |
| 7116963 | Simplified high frequency tuner and tuning method A disclosed method tunes a signal from a channelized spectrum having a predetermined channel spacing. A signal of interest having a predetermined maximum bandwidth is mixed with a local oscillator signal, which has a frequency that is an integer multiple of the chan... | 10/03/2006 |
| 7103342 | System and method for reducing the effects of clock harmonic frequencies A system and a method are provided for reducing the effects of spurious frequencies in a wireless communications device. The system comprises a processor having a reference frequency input and a clock having an output connected to the processor input. The clock supp... | 09/05/2006 |
| 7103267 | Camera which records positional data of GPS unit A camera which records positional data, which is obtained by a GPS unit during photographing, and image data on a memory card. The camera receives the positional data representing the photographing place from the GPS unit, and records the positional data and the ima... | 09/05/2006 |
| 7095997 | Direct-conversion receiver for a communication system using a modulation with non-constant envelope A direct-conversion receiver includes an analog stage for receiving an incident signal from a transmission channel, mixers and programmable-gain amplifiers. The receiver further includes at least one compensation module having input and output terminals respectively... | 08/22/2006 |
| 7061339 | Enhanced architectures of voltage-controlled oscillators with single inductor (VCO-1L) Methods to achieve low power consumption, high output amplitude and an improved high frequency stability, and high speed for voltage-controlled oscillators are disclosed These methods includes to provide a current mirror, a power supply voltage Vdd, two single-ended... | 06/13/2006 |
| 7050838 | Portable terminal device with power saving information processing There is provided a portable information terminal having a built-in radio communications device which minimizes a drop in the voltage of a battery and diminishes the operation threshold voltage of the portable information terminal, thereby lengthening the operatable... | 05/23/2006 |
