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| Number | Title | Issue Date |
| 8060045 | Method for compensating the non-linear distortions of high-frequency signals and device for carrying out said method The present invention refers to a method for compensating the non-linear distortions of high-frequency signals, especially when observing the amplitude modulated signals with narrow band receiver. The invention refers also to a device to carry out the said method. I... | 11/15/2011 |
| 7929935 | Wireless data communications using FIFO for synchronization memory A microprocessor system architecture is disclosed which allows for the selective execution of programmed ROM microcode or, alternatively, RAM microcode if there has been a correction or update made to the ROM microcode originally programmed into the system. Patched ... | 04/19/2011 |
| 7558552 | Integrated circuit and method of generating a bias current for a plurality of data transceivers Various embodiments of the present invention relate to circuits for and methods of generating a bias current for a plurality of data transceivers on an integrated circuit. According to one embodiment, an integrated circuit having a plurality of data transceivers com... | 07/07/2009 |
| 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 |
| 7389094 | Wireless data communications using FIFO for synchronization memory A microprocessor system architecture is disclosed which allows for the selective execution of programmed ROM microcode or, alternatively, RAM microcode if there has been a correction or update made to the ROM microcode originally programmed into the system. Patched ... | 06/17/2008 |
| 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 |
| 7369904 | Integration method for automation components A method for integrating a number of automation components into an industrial controller with a uniform running level model of the runtime system. The basic clock of the running level model is devised from either an internal timer, an internal clock of a communicati... | 05/06/2008 |
| 7369830 | Monolithic GPS RF front end integrated circuit A highly integrated GPS RF Front End which uses a single conversion stage employs an image rejection mixer stage to eliminate the need for an image reject RF bandpass filter. Also a relatively high sample rate A/D is employed which allows a timeless monolitic IF Fil... | 05/06/2008 |
| 7349679 | Integrated power amplifier A power amplifier develops a modulated high power signal by summing the outputs of multiple voltage controlled oscillators. A phase control circuit synchronizes the phase relationship of multiple voltage controlled oscillators. The voltage control oscillators provid... | 03/25/2008 |
| 7280623 | Digital RF correlator for multipurpose digital signal processing Digital RF correlation based signal processing arrangements allow for the development of software—controlled radio reception without the need for down-conversion to IF frequencies. Various arrangements are implemented using superconducting RSFQ logic enabling the ... | 10/09/2007 |
| 7272369 | Method for performing a frequency correction of a wireless device Frequency correction of a radio module. An estimate is made of the amount of frequency correction needed while applying an original reference frequency. If the frequency correction needed is greater than a pre-determined amount, a large shift frequency correction is... | 09/18/2007 |
| 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 |
| 7251467 | Telecommunications using a tunable oscillator Systems and techniques are disclosed relating to wireless communications. These systems and techniques involve wireless communications wherein a device may be configured to recover an information signal from a carrier using a reference signal, detect a frequency err... | 07/31/2007 |
| 7245884 | RF module An RF module includes a multi-layered substrate. A base-band IC, a memory IC, a quartz oscillator and surface-mount components are mounted on the upper surface of the multi-layered substrate. A metallic cap also is attached to the upper surface of the multi-layered ... | 07/17/2007 |
| 7242736 | Data transfer A receiver for digital data is provided. The receiver comprises a ring buffer operable to store received data. The receiver also comprises a write pointer controller for the buffer, operable to control the writing of received data into the buffer, and a read pointer... | 07/10/2007 |
| 7228117 | Frequency correction method and apparatus for correcting secular change In order to always maintain a frequency of an oscillator within a proper range, the frequency chages due to temperature and a secular change, a method is disclosed in which the secular change is calculated from past control information, and the frequency of the osci... | 06/05/2007 |
| 7228118 | Method of calibrating PLL frequency synthesizers to precise frequencies with low tolerance crystals in their master reference oscillators A frequency tracking circuit and method comprising a master crystal oscillator circuit is used for frequency tracking between a handset and a base station comprising a calibration subsystem for taking a temperature measurement, a reference control circuit for determ... | 06/05/2007 |
| 7224722 | Direct conversion RF transceiver with automatic frequency control A single chip radio transceiver includes circuitry that enables received wideband RF signals to be down-converted to baseband frequencies and baseband signals to be up-converted to wideband RF signals prior to transmission without requiring conversion to an intermed... | 05/29/2007 |
| 7222055 | High bandwidth real-time oscilloscope A method and apparatus for digitizing a signal. The method comprises the steps of receiving an input analog signal, splitting the received input analog signal into a plurality of signals and frequency converting at least one of the signals in accordance with a prede... | 05/22/2007 |
| 7221920 | Voltage controlled oscillator, frequency synthesizer and communication apparatus A voltage controlled oscillator includes a resonator configured to resonate with an initial oscillation frequency during starting period of oscillation and a steady oscillation frequency during a steady state oscillation. The resonator includes a film bulk acoustic ... | 05/22/2007 |
| 7215936 | Super-regenerative receiver including phase-locked loop An improved low-cost super-regenerative receiver includes sampling phase-locked loop. Phase sampling is controlled by the quench signal (264). In the preferred embodiment, logic state HIGH to logic state LOW transition of the quench signal (264) define... | 05/08/2007 |
| 7196738 | Tuner integrated circuit and television tuner using the same circuit One embodiment of a tuner integrated circuit includes two mixer circuits, an IF amplifier circuit, three oscillation circuits, a PLL circuit, and a reference oscillation circuit. A plurality of terminals are provided at two sides of the tuner integrated circuit and ... | 03/27/2007 |
| 7177610 | Calibrated low-noise current and voltage references and associated methods A low-noise current reference circuitry includes a voltage source, a current source, and a controller. The voltage source generates a reference voltage. The current source provides a low-noise output current in response to a control signal. The controller provides t... | 02/13/2007 |
| 7171183 | Linearized fractional-N synthesizer having a current offset charge pump A linear fractional-N synthesizer includes phase and frequency detection module, a charge pump circuit, a loop filter, a voltage controlled oscillator, and a fractional-N divider. The phase and frequency detection module is operably coupled to produce a charge up si... | 01/30/2007 |
| 7167727 | Wireless data communications using FIFO for synchronization memory A wireless (radio) receiver receives RF signals carrying data synchronized with a first clock. The wireless receiver demodulates the RF signals to extract the data signals and the first clock signals. The wireless receiver uses the first clock signals as write signa... | 01/23/2007 |
| 7162216 | Wireless communication system A wireless communication system, which is provided with a PLL circuit having a plurality of oscillators and is capable of processing two or more transmit and receive signal different in frequency band from one another according to the switching between the oscillato... | 01/09/2007 |
| 7155181 | High sensitivity RF receiver and method for forming the same A method for improving sensitivity of a RF receiver and a RF receiver designed by the same are provided. The RF receiver, which receives a RF signal, comprises a sampling converting circuit, a decoding circuit, a frequency-hopping circuit, a constant current source ... | 12/26/2006 |
| 7154341 | Communication semiconductor integrated circuit device and wireless communication system A communication semiconductor integrated circuit device includes an RFVCO and a TXVCO and is formed over one semiconductor substrate, and has a first operation mode (idle mode) which does not perform transmission and reception, a second operation mode (warmup mode) ... | 12/26/2006 |
| 7155174 | Method and apparatus for compensating for frequency offsets caused by a free-running oscillator A transceiver includes a Downstream Signal Processor (DSP), an Upstream Signal Processor (USP), a Local Oscillator (LO), a differencer, a reference signal generator, and an estimator. The DSP receives an initial downstream signal, a downstream LO signal from the LO,... | 12/26/2006 |
| 7145894 | Continuously adjusted-bandwidth discrete-time phase-locked loop A user equipment which receives a CDMA communication signal that is wirelessly transmitted includes a system for correcting phase errors in an information signal which has been transmitted. The correction system comprises circuitry for generating a correction signal... | 12/05/2006 |
| 7145482 | Method, system, and apparatus for remote data calibration of a RFID tag population A method, system, and apparatus for remotely calibrating data symbols received by a radio frequency identification (RFID) tag population are described. Tags are interrogated by a reader, which may be located in a network of readers. The reader transmits data symbols... | 12/05/2006 |
| 7139530 | Method and apparatus for calibrating a reference oscillator A method and apparatus for calibrating a reference oscillator and use of a calibrated reference oscillator is disclosed. To gain cost reduction advantages, a less accurate reference oscillator is utilized in a wireless communication device. The cost benefit is gaine... | 11/21/2006 |
| 7133647 | Chiprate correction in digital transceivers A transceiver for a code division multiple access communication system comprises a receiver to receive coded information signals and a transmitter to transmit coded information signals. A local oscillator provides a time and frequency reference for the receiver and ... | 11/07/2006 |
| 7123650 | Offset carrier frequency correction in a two-way broadband wireless access system A method for correcting for the offset carrier frequency in a wireless modem is provided. The method further allows for the periodic correction of the offset of the carrier frequency. A Fine tuning method is implemented that uses fine tuning frequency increments to ... | 10/17/2006 |
| 7103339 | Automatic frequency correction method and receiver for time division duplex modes of 3G wireless communications A receiver for use in a wireless communication system includes a voltage controlled oscillator and estimating means for obtaining a frequency estimate to adjust the voltage controlled oscillator, thereby correcting an oscillator frequency error. The estimating means... | 09/05/2006 |
| 7103338 | Initial frequency synchronization mechanism Method for acquiring frequency of a desired channel having a carrier frequency FMAIN, for a dynamic receiver frequency FMOBILE, from a starting frequency FSTART, in the presence of high power adjacent interfering channels, wherein th... | 09/05/2006 |
| 7082295 | On-chip loop filter for use in a phase locked loop and other applications A phase locked loop that includes such a loop filter, the phase locked loop includes a difference detector, programmable charge pump, fixed loop filter, voltage controlled oscillator and adjustable divider module. The difference detector is operably coupled to deter... | 07/25/2006 |
| 7082292 | Mobile communications device with GPS receiver and common clock source A mobile communications device using a common oscillator for communication and global positioning system (GPS) functions. In one embodiment, a communications unit receives a precision carrier frequency signal from a source and generates a reference signal that is us... | 07/25/2006 |
| 7053725 | 4X crystal frequency multiplier with op amp buffer between 2X multiplier stages A frequency-multiplying circuit generates a multiple of the fundamental frequency of a crystal that oscillates. A first differential multiplier is coupled to the crystal nodes and generates a frequency-doubled output. The frequency-doubled output is applied to an op... | 05/30/2006 |
| 7046968 | Frequency correcting method for cellular phone terminal When a cellular phone terminal is powered on, it immediately receives a reference signal (non-modulated reference frequency signal for correcting a crystal oscillation circuit) for correcting the reception frequency of a radio signal transmitted from a base station ... | 05/16/2006 |
