Broadcom Corporation

Avago Technologies International Sales Pte. Limited

Avago Technologies General IP Pte, Ltd.

Francesco Gatta

Ramon Alejandro Gomez

Leonard Dauphinee

Young J Shin

Hanli Zou

Thomas J Kolze

Bruce Joseph Currivan

Loke Kun Tan

Lin He

Massimo Brandolini

Robindra B Joshi

Binning Chen

Giuseppe Cusmai

Steven T Jaffe

Donald George McMullin

Dongsoo Daniel Koh

Harold Raymond Whitehead

Karapet Khanoyan

Bryan Juo-Jung Hung

Navin Harwalkar

Rajeshmohan Radhamohan

Thomas Joseph Kolze

Young Shin

Method and apparatuses are disclosed to substantially compensate for various unwanted interferences and/or distortions within a communications receiver. Each of these apparatuses and methods estimate the various unwanted interferences and/or distortions within the communications receiver. Each of these apparatuses and methods remove the estimates of the various unwanted interferences and/or distortions within the communications receiver from one or more communications signals within the communications receiver to substantially compensate for the various unwanted interferences and/or distortions.

Compensating for unwanted interference in a communications receiver

A method and apparatus is disclosed to determine communications receiver parameters from multiple channels of a received communications signal and to configure and/or adjust communications receiver parameters to acquire one or more channels from among the multiple channels of the received communications signal. A communications receiver observes a multi-channel communication signal as it passes through a communication channel. The communications receiver determines one or more communications receiver parameters from the multiple channels of the received communications signal. The communications receiver configures and/or adjusts communications receiver parameters to acquire the one or more channels from among the multiple channels of the received communications signal.

Communication receiver enhancements using multi-signal capture

Systems and methods for demodulating a plurality of contiguous channels contained within a bandlimited portion of a radio-frequency (RF) input signal are provided. In an embodiment, the bandlimited portion of the RF input signal is down-converted to baseband. After down-conversion, the bandlimited portion overlaps at baseband with a mirror image of the bandlimited portion. The plurality of contiguous channels within the down-converted signal similarly overlap at baseband and subsequently occupy a bandwidth substantially equal to half that required before down-converting. Image rejection is performed in the digital domain to recover each of the plurality of overlapping channels.

Variable low IF receiver for multi-channel applications

Selectable interference cancellation in a communications receiver

A system comprises a first amplifier stage including a first amplifier, a second amplifier stage including second and third amplifiers, and a fourth amplifier. The first amplifier stage includes an input and an output. The second amplifier stage is coupled between the output of the first amplifier stage and a first output node. The fourth amplifier is coupled between the input of the first amplifier stage and a second output node.

Amplifier for cable and terrestrial applications with independent stage frequency tilt

Compensating for unwanted distortion in a communications receiver

Configurable adaptive filter

Multi-tuner variable low IF receiver for multi-channel applications

An embodiment of the present invention provides a system comprising a summing device and first amplifier portion. The summing device is coupled to an output node. The first amplifier portion is coupled between an input node and the summing device. The first amplifier portion includes a first amplifier, a first filter, and first and second switches. The first amplifier is coupled between the input node and the summing device on a first path. The first filter is coupled between the input node and the first amplifier on a second path, the second path being in parallel to the first path. The first switch is coupled between the input node and the first amplifier along the first path. The second switch is coupled between the input node and the first filter along the second path.

Frequency response compensation amplifier arrangements

A method and apparatus is disclosed to extend a dynamic input range of an analog to digital converter (ADC). A composite ADC may include one or more ADCs. The one or more ADCs compare a signal metric of an analog input signal to quantization levels to produce intermediate digital output signals using one or more non-clipping input values. The composite ADC may select among the one or more intermediate digital output signals based on the signal metric of the analog input signal to produce a final digital output.

Analog to digital converter (ADC) with extended dynamic input range

An apparatus and method is disclosed to calculate the actual received desired channel power from the downstream transmit power of a Cable Modem Termination System (CMTS) when operating at the nominal line voltage and/or at the normal room temperature as per the DOCSIS specification. A Set-top Device produces a Downstream Power Management (DPM) gain measurement signal having a known power level. The Set-top Device embeds the DPM gain measurement signal onto a received downstream multi-channel communication signal. After embedding the DPM gain measurement signal onto the downstream multi-channel communication signal, the Set-top Device downconverts the combined DPM gain measurement signal and downstream multi-channel communication signal to recover one or more communication channels containing information of a broadcast. The Set-top Device measures a power level of a representation of the DPM gain measurement signal embedded within the one or more communication channels containing the information of the broadcast to determine a Set-top Device gain. The Set-top Device measures a power level of the one or more communication channels containing the information of the broadcast. The Set-top Device calculates the actual received desired channel power from the downstream transmit power of the CMTS based on the Set-top Device gain and the power level of the one or more communication channels containing the information of the broadcast.

Apparatus and method for downstream power management in a cable system

Various embodiments are disclosed relating to calibration techniques for a phase-locked loop (PLL) bandwidth. According to an example embodiment, a calibration technique may include calibrating a voltage-controlled oscillator (VCO) of a phase-locked loop (PLL) circuit, and calibrating a bandwidth of the PLL circuit based on the calibrating the VCO.

Calibration techniques for phase-locked loop bandwidth

Growing community of inventors

Laguna Niguel, CA, United States of America

Francesco Gatta