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| Number | Title | Issue Date |
| 8131242 | System and method for implementing a swap function for an IQ generator A system and method for implementing an IQ generator includes a master latch that generates an I signal in response to a clock input signal, and a slave latch that generates a Q signal in response to an inverted clock input signal. A master selector is configured to... | 03/06/2012 |
| 8005450 | 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... | 08/23/2011 |
| 7941115 | Mixer with high output power accuracy and low local oscillator leakage A circuit receives a first signal (for example, a baseband signal) and mixes it with a local oscillator (LO) signal, and outputs a second signal (for example, an RFOUT signal). The circuit includes multiple identical Mixer and Frequency Divider Pair (MFDP) circuits.... | 05/10/2011 |
| 7899422 | Sigma delta modulated phase lock loop with phase interpolation A sigma delta modulated phase lock loop reduces quantization noise by using phase interpolation to increase an effective frequency resolution of the dividing ratio of a divider. ... | 03/01/2011 |
| 7899423 | Method and system for a synthesizer/local oscillator generator (LOGEN) architecture for a quad-band GSM/GPRS radio A method for processing signals is disclosed and may include performing using one or more circuits in a multiband radio, functions including receiving an input signal from an oscillator that generates signals for each of a plurality of bands handled by the multiband... | 03/01/2011 |
| 7826814 | Frequency synthesizer A frequency synthesizer comprises: a single-tone signal generator which outputs signals of a single frequency; a frequency multiplier which generates one or more intermediate signals having different frequencies based on frequencies of input signals and outputs the ... | 11/02/2010 |
| 7778619 | Method and apparatus for automatic frequency correction with a frequency error signal generated by block correlation of baseband samples with a known code sequence The present invention is related to a method and apparatus for automatic frequency correction of a local oscillator. The apparatus receives a carrier signal. The carrier signal includes a code sequence known to the apparatus. The apparatus downconverts the carrier s... | 08/17/2010 |
| 7720454 | Extremely low IF architecture for in-band on-channel (IBOC) radio A radio frequency (RF) receiver includes an intermediate frequency (IF) mixer that generates an output signal based on mixing a hybrid in-band, on-channel (IBOC) signal with an intermediate frequency signal. An oscillator generates the intermediate frequency signal;... | 05/18/2010 |
| 7650129 | Receiver for a multi-carrier signal A receiver which is arranged to receive an RF multi-carrier signal (60) comprises an in-phase mixer (51) for frequency down converting the RF multi-carrier signal to an in-phase multi-carrier signal (I) and a quadrature mixer (52) for frequency ... | 01/19/2010 |
| 7599676 | Power consumption reduction techniques for an RF receiver implementing a mixing DAC architecture A receiver (100) includes a mixing digital-to-analog converter (DAC) (120), a direct digital frequency synthesizer (DDFS) (116), and a clock circuit (114). The mixing DAC (120) includes a radio frequency (RF) transconductance secti... | 10/06/2009 |
| 7587189 | Determination and processing for fractional-N programming values Determination and processing for fractional-N programming values. The present invention is operable to receive a clock signal (CLK) and to transform that CLK into a new CLK, when necessary, for use by various circuitries within a system. The present invention is ope... | 09/08/2009 |
| 7548739 | Apparatus for receiving radio signal using magnetic oscillator A receiver apparatus includes a preamplifier to amplify an input signal, an equalizer configured to subject an amplified signal to an equalization process, an identification reproducer to reproduce the input signal based on an output signal of the equalizer, and a m... | 06/16/2009 |
| 7519343 | Receiver for receiving a data stream having first and second reference entries and method for operating the same A receiver includes a receiver clock oscillator controllable with regard to its receiver oscillator frequency, means for detecting a number of clock periods that the receiver clock oscillator performs in a specifiable period of time, means for extracting a first and... | 04/14/2009 |
| 7512389 | Active inductors using bipolar silicon transistors An active inductor includes bipolar transistors T1, T2, T3 and TD (TD being arranged in diode), where T1's emitter is connected to an output port and to T2's collector. T2's base is connected to a first voltage line and betw... | 03/31/2009 |
| 7509108 | Method and apparatus for automatic frequency correction with a frequency error signal generated by block correlation of baseband samples with a known code sequence The present invention is related to a method and apparatus for automatic frequency correction of a local oscillator. The apparatus receives a carrier signal. The carrier signal includes a code sequence known to the apparatus. The apparatus downconverts the carrier s... | 03/24/2009 |
| 7509107 | Method and apparatus for extending the lower frequency operation of a sampler based VNA Circuitry is provided to drive a step recovery diode (SRD) (8) in a sampler based vector network analyzer (VNA) that allows harmonic samplers (10, 11) to operate over many octaves. The circuit includes a digital pulse generator (FIG. 5) for prov... | 03/24/2009 |
| 7505749 | Method and system for a synthesizer/local oscillator generator (LOGEN) architecture for a quad-band GSM/GPRS radio Methods and systems for processing signals for a multiband radio are disclosed herein. Aspects of the method may comprise dividing an input signal generated by an oscillator used to generate signals for each of a plurality of bands for the multiband radio. A feedbac... | 03/17/2009 |
| 7457600 | VCO device VCO (voltage-controlled oscillator) device used for a radio unit such as a television broadcast receiver. A VCO device oscillating in a wide band of oscillation frequency and capable of realizing low power consumption is provided. VCO circuit group 4 oscillat... | 11/25/2008 |
| 7447491 | Multi-tuner integrated circuit architecture utilizing frequency isolated local oscillators and associated method Integrated multiple tuner architectures and associated methods are disclosed that utilize frequency isolated local oscillators (LO). These architectures utilize dividers and multipliers within the signal paths for the local oscillator mixing signals to reduce interf... | 11/04/2008 |
| 7424280 | Frequency synthesizer and frequency synthesis method A dual frequency synthesizer includes a reference oscillator, an R counter, a first fractional-N phase-locked loop (for a receiving channel) and a second fractional-N phase-locked loop (for a transmitting channel) and one shared sigma-delta modulator. The reference ... | 09/09/2008 |
| 7391840 | Phase locked loop circuit, electronic device including a phase locked loop circuit and method for generating a periodic signal A phase locked loop (PLL) circuit (1) comprising a loop input (11); a phase detector section (2) for detecting a phase difference between an input signal and a reference signal. The phase detector section (2) has a detector input connected to th... | 06/24/2008 |
| 7386064 | Communication semiconductor integrated circuit device and a wireless communication system In one embodiment, a PLL circuit is provided with a plurality of pull-in operation modes for pulling a voltage across a filter capacitor (C1, C2) in a lock-up voltage, and with a register (CRG) for designating one of the plurality of pull-in operation ... | 06/10/2008 |
| 7383033 | Differential and quadrature harmonic VCO and methods therefor A differential and quadrature harmonic voltage controlled oscillator (VCO), and a method for generating a differential and quadrature harmonic signal. The VCO may include a first oscillation unit for generating a first and a third signal, a first combining unit for ... | 06/03/2008 |
| 7379722 | Frequency allocation using a single VCO An apparatus and method to use a single voltage controlled oscillator (VCO) to generate frequencies to cover multiple frequency bands. The single VCO generates local oscillator signals for more than one frequency band of a communication standard or protocol, such as... | 05/27/2008 |
| 7359359 | Method and system of channel adaptation The present invention relates to transmissions and retransmissions in a communications system. It reveals a method and system for backward compatible detection of an introduced channel sub-frame structure particularly well suited for data transmissions. The inventio... | 04/15/2008 |
| 7356716 | System and method for automatic calibration of a reference voltage A system and system for automatic voltage calibration is presented. A voltage calibration system includes three main units, which are a voltage level trimming unit, a trim detection unit, and a trim control unit. The three units work in conjunction with each other d... | 04/08/2008 |
| 7353011 | Method and apparatus for operating a PLL 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... | 04/01/2008 |
| 7336754 | Clock and data recovery circuit A clock and data recovery circuit, for tracking frequency-modulated input data, comprises a phase detector for receiving a data signal and a synchronous clock signal, detecting a phase delay or a phase advance, and outputting an UP1/DOWN1 signal, first... | 02/26/2008 |
| 7324800 | Wake-up system with passive correlators Disclosed is a wake-up system with passive correlators, adopted to wireless transmission/reception devices such as remote controllers, mobile communication terminals, etc. The wake-up system includes a transmitter and receiver. In the transmitter wake-up signals and... | 01/29/2008 |
| 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 |
| 7312669 | Oscillation circuit An oscillation circuit for generating two oscillation signals having a phase difference of 90° by using an LC oscillator has a disadvantage for integration. Therefore, a differential type ring oscillator comprising interpolation type delay circuits of four stages i... | 12/25/2007 |
| 7308240 | Numerical control oscillator, digital frequency converter and radio frequency unit A numerical control oscillator (NCO) for reducing a circuit size and power consumption while maintaining a desired frequency deviation, and suppressing generation of a spurious as much as possible. The NCO comprises a phase accumulator for accumulating input phase d... | 12/11/2007 |
| 7305219 | Portable radio terminal and AFC control method A portable radio terminal for realizing automatic frequency control (AFC) for automatically controlling the oscillation frequency of an oscillator includes a unit for intermittently performing AFC operation, and a unit for shortening an AFC operation stop period whe... | 12/04/2007 |
| 7299024 | Compensation for frequency adjustment in mobile communication-positioning device with shared oscillator In a mobile communication device, a method for compensating for a frequency adjustment in an oscillator shared between a communication circuit and a positioning signal receiver is provided. In one embodiment, a method for determining the operating frequency of an os... | 11/20/2007 |
| 7292832 | Timing and frequency control method and circuit for digital wireless telephone system terminals A wireless terminal circuit includes a variable high frequency clock oscillator that provides a high frequency clock signal and a fixed low frequency clock oscillator that provides a low frequency clock signal. A phase-locked loop adjusts a ratio of the frequency of... | 11/06/2007 |
| 7272374 | Dynamic selection of local oscillator signal injection for image rejection in integrated receivers A system and method are disclosed for dynamically selecting high-side injection or low-side injection of local oscillator mixing signals based upon an assessment of signal power within the input signal spectrum that could cause unwanted images in the processed signa... | 09/18/2007 |
| 7272373 | Ratiometric clock systems for integrated receivers and associated methods A ratiometric clock system for an integrated receiver and associated method are disclosed that provide an advantageous solution for combining digital signal processing (DSP) circuitry on the same integrated circuit as mixer and local oscillator (LO) generation circu... | 09/18/2007 |
| 7269402 | PLL circuit having a multi-band oscillator and compensating oscillation frequency A semiconductor integrated circuit device for communication is provided with a PLL circuit or the like formed therein, the PLL circuit which is capable of realizing the compensation of fluctuation due to temperature change, the inhibition of increase in the chip are... | 09/11/2007 |
| 7263339 | Tuner comprising a voltage converter The invention relates to a tuner for converting a radio frequency signal into an intermediate frequency signal, said tuner comprising a voltage converter supplying a control signal, a mixer associated with an oscillator which is voltage-controlled by said control si... | 08/28/2007 |
| 7263138 | Q-quenching super-regenerative receiver A super-regenerative receiver uses controlled Q-quenching and may limit the resonant tank circuit amplitude by loading the tank circuit as soon as regenerative oscillation is detected. An amplitude detector is coupled to the regenerative amplifier and controls a Q l... | 08/28/2007 |
