Broadcom Corporation

Axiom Microdevices, Inc.

Newport Media, Inc.

Frank Carr

Pieter Vorenkamp

Klaas Bult

Afshin Mellati

Seyed Ali Hajimiri

Scott D Kee

Ichiro Aoki

Hui Wu

Florian Bohn

James Y C Chang

Alexandre Rudolph Kral

Rahul Magoon

Edward Youssoufian

Hassan Elwan

Donald McClymont

Tom W Kwan

Myles H Wakayama

Ralph A Duncan

Haideh Khorramabadi

Aly Mamdouh Ismail

Christopher M Ward

Lawrence M Burns

Steven T Jaffe

Chun-Ying Chen

Peter R Kinget

Young J Shin

Hong Shi

Amr M Fahim

Arnoldus Venes

Thinh Cat Nguyen

David S P Ho

Iconomos A Koullias

Mohy Abdelgany

Dana Vincent Laub

Daniel J Marz

Hsiang-Bin Lee

Ron Lipka

Alexander Kral

Rabul Magoon

Luke Thomas Steigerwald

Patrick Pai

Nabil R Yousef

Christopher Michael Ward

Ahmed A Emira

Janakan Sivasubramaniam

Jerry Twomey

Donald McGlymont

Seyed-Ali Hajimiri

Alexandre Kral

Donald Mcclymont

David SP Ho

James YC Chang

Young Joon Shin

An integrated power combiner is disclosed. The power combiner includes a first circular geometry primary winding having one or more inductive elements, such as an active winding with one or more driver stages. A circular geometry secondary winding is disposed adjacent to the first primary winding, such as an active winding with one or more driver stages. A second circular geometry primary winding is disposed adjacent to the secondary winding and has one or more inductive elements. One or more connections are provided between one or more of the inductive elements of the first circular geometry primary winding and one or more of the inductive elements of the second circular geometry primary winding.

Multi-primary distributed active transformer amplifier power supply and control

A method of filtering and a RF filtering circuit comprising a LO adapted to generate in-phase and quadrature LO signals; a quadrature passive mixer operatively connected to the LO; a filtering impedance operatively connected to the quadrature passive mixer, wherein the voltage at an input node of the quadrature passive mixer comprises the voltage across the filtering impedance up-converted to a frequency of a LO signal received by the quadrature passive mixer. Preferably, the voltage across the filtering impedance comprises a frequency of an input signal of the quadrature passive mixer down-converted by a frequency of the in-phase and quadrature LO signals and filtered by the filtering impedance.

System and method for performing RF filtering

An integrated communications system. A substrate having a receiver disposed on the substrate for converting a received signal to an IF signal, a digital IF demodulator disposed on the substrate and coupled to the receiver for converting the IF signal to a demodulated baseband signal, and a transmitter disposed on the substrate operating in cooperation with the receiver to establish a two way communications path.

Digital IF demodulator for video applications

A tuner for use in mobile television devices comprises at least one RF front end component comprising a LNA adapted to amplify mobile television signals; a PLL circuit to generate signals; and a pair of mixers to receive the signals from the LNA and the PLL circuit and downconvert the signals; an analog baseband component connected to the RF front end component, wherein the analog baseband component comprises I and Q channel signal paths each comprising a tunable high order impedance filter; at least one signal amplification stage; and a signal filter stage connected to the signal amplification stage, wherein the analog baseband component further comprises a plurality of switches operatively connected to the I and Q channel signal paths, and wherein the plurality of switches are selectively opened and closed in multiple configurations in order to allow the tuner to receive mobile TV signals for all mobile TV standards.

Universal tuner for mobile TV

An integrated receiver with channel selection and image rejection substantially implemented on a single CMOS integrated circuit is described. A receiver front end provides programmable attenuation and a programmable gain low noise amplifier. Frequency conversion circuitry advantageously uses LC filters integrated onto the substrate in conjunction with image reject mixers to provide sufficient image frequency rejection. Filter tuning and inductor Q compensation over temperature are performed on chip. The filters utilize multi track spiral inductors. The filters are tuned using local oscillators to tune a substitute filter, and frequency scaling during filter component values to those of the filter being tuned. In conjunction with filtering, frequency planning provides additional image rejection. The advantageous choice of local oscillator signal generation methods on chip is by PLL out of band local oscillation and by direct synthesis for in band local oscillator. The VCOs in the PLLs are centered using a control circuit to center the tuning capacitance range. A differential crystal oscillator is advantageously used as a frequency reference. Differential signal transmission is advantageously used throughout the receiver.

Temperature compensation for internal inductor resistance

Fully integrated tuner architecture

A direct conversion satellite tuner is fully integrated on a common substrate. The integrated tuner receives an RF signal having a plurality of channels and down-converts a selected channel directly to baseband for further processing. The integrated tuner includes on-chip local oscillator generation, tunable baseband filters, and DC Offset cancellation. The integrated tuner can be implemented in a completely differential I/Q configuration for improved electrical performance. The entire direct conversion satellite tuner can be fabricated on a single semiconductor substrate using standard CMOS processing, with minimal off-chip components. The tuner configuration described herein is not limited to processing TV signals, and can be utilized to down-convert other RF signals to an IF frequency or baseband.

Integrated direct conversion satellite tuner

An electrical circuit and method of power management of a cellular telephone includes a battery adapted to produce a battery voltage; a LDO regulator operatively connected to the battery and adapted to provide a constant supply voltage from the battery voltage; and a DC-DC converter operatively connected to the LDO regulator, wherein the DC-DC converter is adapted to step down the constant supply voltage to a lower voltage level, wherein the LDO regulator and the DC-DC converter are embedded on a single integrated circuit chip. The constant supply voltage equals 3.6V at an output of the LDO, and the constant supply voltage is applied to an input of the DC-DC converter. Moreover, the battery voltage equals at most 5.5V.

Integrated CMOS DC-DC converter implementation in low-voltage CMOS technology using LDO regulator

Digital autonomous AGC for a DVB-H receiver comprises detecting a plurality of RF signals entering a LNA in the DVB-H receiver; detecting a RF transmitter blocker signal occurring at the LNA; and differentiating between a desired RF signal and an undesired RF transmitter blocker signal by varying a differential gain of current through the LNA. A RF servo loop is used for detecting the RF transmitter blocker signal. Logic circuitry of the RF servo loop is integrated with a baseband AGC loop to step control the differential gain of current through the LNA. A RF wideband detector is used for detecting the plurality of RF signals entering the LNA; and sending a voltage output corresponding to voltage levels of the RF signals to a plurality of comparators, wherein each of the plurality of comparators are set at a different programmable voltage threshold level compared with one another.

System and method for digital autonomous automatic gain control (AGC) for DVB-H receivers

A technique for downconverting a RF signal comprises an antenna adapted to receive an RF signal; a transconductance amplifier connected to the antenna and adapted to amplify the RF signal; a passive mixer connected to the transconductance amplifier and adapted for current domain mixing of electrical current transferred from the transconductance amplifier; and a load impedance connected to the passive mixer. The load impedance may comprise a parallel combination of a frequency dependent negative resistance component, a capacitor, and a resistor. The load impedance may comprise a pair of complex poles, a pair of imaginary zeros, and a real pole. Voltages at an input and an output of the passive mixer are related such that the input voltage of the passive mixer is an upconverted version of the output voltage of the passive mixer, wherein the input voltage of the passive mixer is at an output of the transconductance amplifier.

Low power highly linear RF downconverter

Growing community of inventors

Dove Canyon, CA, United States of America

Frank Carr