Abstract: Devices and methods for receiving, processing and formatting digital video. The devices may include a single semiconductor chip on which is imprinted a radio frequency signal tuner module and a display interface module. The display interface module may be configured to receive programming information from the radio frequency signal tuner module. The display interface module may be configured to communicate the programming information to a digital video recorder. The radio frequency tuner module may include a first radio frequency input channel and a second radio frequency input channel. The radio frequency signal tuner module may include a system oscillator and a phase-locked loop (“PLL”) circuit configured to generate a clock signal. The phase-locked loop circuit may be configured to transmit the signal to the display interface module and to any other suitable modules on the chip.

Abstract: An electronic device capable of performing automatic frequency control (AFC) to maintain frequency and timing without good received bursts, in which an oscillation unit and a baseband processing unit are provided. Wherein, the baseband processing unit computes a compensation adjustment according to a prediction model and stored information regarding a previous digital value adjustment when detecting that the baseband processing unit is incapable of controlling the oscillation unit according to received bursts from the remote communication unit, and adjusts the oscillation unit according to the determined compensation adjustment.

Abstract: Electronic devices contain radio-frequency receivers such as direct conversion receivers. A receiver may receive radio-frequency antenna signals from an antenna in an electronic device. The receiver may include notch filters that attenuate signals in the center of the communications channel that is being received by the receiver. An electronic device may include a clock source. The clock source may be used to clock electrical components in the electronic device. During operation, the clock source may produce radio-frequency interference signals at an associated interferer frequency. The potential for the interference signals to disrupt operation of the receiver can be reduced by configuring the electronic device so that the interferer frequency is aligned with the center of the communications channel. The clock source may be adjusted dynamically to accommodate changes in the communications channel.

Abstract: Devices and methods for receiving, processing and formatting digital video. The devices may include a single semiconductor chip on which is imprinted a radio frequency signal tuner module and a display interface module. The display interface module may be configured to receive programming information from the radio frequency signal tuner module. The display interface module may be configured to communicate the programming information to a digital video recorder. The radio frequency tuner module may include a first radio frequency input channel and a second radio frequency input channel. The radio frequency signal tuner module may include a system oscillator and a phase-locked loop (“PLL”) circuit configured to generate a clock signal. The phase-locked loop circuit may be configured to transmit the signal to the display interface module and to any other suitable modules on the chip.

Abstract: A technique to provide accurate and efficient transmit power control by providing offset values to modify a base input gain value for a gain control circuit used to set a transmit power gain in a mobile phone. The modified gain value compensates for a ripple offset and power level offset caused by a difference in operating temperature and operating frequency from values obtained during calibration at a calibration frequency and temperature.

Abstract: The present invention relates to a method for controlling a frequency in a receiver, in particular in a receiver used in a telecommunications system.

Abstract: There is a need for an inexpensive, high-performance, fully-integrable, multi-standard transceiver, which suppresses spurious noise signals. The invention provides a topology that satisfies this need, using a first signal generator which produces an oscillator signal f1 and a second signal generator which produces a mono-tonal mixing signal ?2, where f1 is a multiple of the frequency of ?2; and a logic circuit for generating a multi-tonal mixing signal ?1, where ?1*?2 has significant power at the frequency of said local oscillator signal being emulated, neither of said cp1 nor said ?2 having significant power at the carrier frequency of said input signal x(t) or said LO signal being emulated.

Abstract: A wideband tuning circuit suitable for a low-voltage silicon process includes a plurality of frequency band modules for generating a frequency within a particular frequency band of the tuning range. Each frequency band module includes a tuning sensitivity controller responsive to a tuning sensitivity control signal, a sub-band tuning network responsive to one of the frequency band module control signals, a resonator inductor, and a negative resistance generator coupled to the inductor to offset resistance of the inductor. A frequency band module control signal causes the sub-band tuning network to select a sub-band within the frequency band of one of the frequency band module, and a tuning sensitivity control signal causes the tuning sensitivity controller to control the output frequency of the frequency band module within a selected sub-band. A multiplexer selectively couples the output frequency from one of the frequency band modules in response to a band select signal.

Abstract: A method of determining a reference frequency in a wireless communication device is disclosed. The method comprises the steps of providing a known frequency source; receiving a signal from an unknown frequency source; and calculating an estimate of the frequency of the signal from the unknown frequency source based upon the frequency of the known frequency source. establishing a communication link based upon the frequency of the signal from the unknown frequency source. A wireless communication device according to the present invention is also disclosed comprising a first frequency source associated with a GPS receiver and generating a substantially fixed frequency; a second frequency source associated with a host device and generating an unknown frequency; a counter coupled to the second frequency source; and a control circuit coupled to the counter, the control circuit determining the frequency of the second frequency source based upon the substantially fixed frequency and a value of the counter.