Broadcom Corporation

M/a -com, Inc.

Walid Ahmed

Wei Luo

John Cumming Leete

Yuyu Chang

David Bengtson

Anthony Dennis

Yongwen Yang

Radwan Husseini

Nelson Ray Sollenberger

Morten Damgaard

Theodoros Georgantas

John Leung

Methods and systems are provided to calibrate an oscillator circuit to reduce frequency pulling as a result of a change in power to a portion of the oscillator circuit. In an embodiment, an oscillator is coupled to a clock buffer circuit and a tuning capacitor configured to tune a frequency of the oscillator to a baseline frequency required for cellular communications. A change in power to the clock buffer circuit initiates a change in an amount of capacitance seen by the oscillator, which negatively impacts the tuning of the oscillator. A register stores a frequency offset caused by the change in power, and the tuning capacitor is adjusted, using the frequency offset, in response to the change in power, such that the total amount of capacitance seen by the oscillator is not changed when the change in power occurs.

Systems and methods for reducing frequency pulling in an oscillator circuit

Aspects of a method and system for integrated blocker detection and automatic gain control are provided. In this regard, a communication device may generate one or more first signal strength indications based on a strength of a received signal at a first point in the analog front-end of the communication device. The communication device may generate one or more second signal strength indications based on a strength of the received signal at a second point in a digital processing module of the communication device. The first point in the analog front-end may be an input or an output of a down-conversion mixer. The second point in the digital processing module may be an output of an analog-to-digital converter or an output of a channel selection filter. The communication device may control, utilizing the first signal strength indication(s) and the second signal strength indication(s), a gain of one or more components of the communication device.

Method and system for blocker detecton and automatic gain control

A transmitter comprises a baseband processor, a wideband phase modulator and an amplitude modulated amplifier. A signal is provided through the baseband processor and is converted into polar coordinates, comprised of amplitude and phase components, with the amplitude component being transmitted to the amplitude modulated amplifier. The amplitude modulated amplifier being comprised of independently controllable current sources, and with the phase component being transmitted to the wideband phase modulator, for modulation upon a carrier wave, and subsequent transmission to the amplitude modulated amplifier for amplification according to control imposed by the amplitude component upon the current sources.

Electromagnetic wave transmitter systems, methods and articles of manufacture

A transceiver and transmitter are shown. A baseband processor receives a signal for transmission. It converts the signal into amplitude and phase polar components. Each component is then processed&#x2014;the phase component through a wideband phase modulator and the amplitude component through a wideband amplitude modulator, and the components are then recombined for further processing or transmission.

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Tinton Falls, NJ, United States of America

Walid Ahmed