Broadcom Corporation

Hsiang-Bin Lee

Chun-Ying Chen

Lawrence M Burns

Frank Carr

Myles H Wakayama

Young J Shin

James Y C Chang

Alexandre Rudolph Kral

Afshin Mellati

David S P Ho

Iconomos A Koullias

Dana Vincent Laub

Patrick Pai

Ron Lipka

Luke Thomas Steigerwald

David SP Ho

James YC Chang

Young Joon Shin

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

A voltage regulator circuit includes a single high voltage regulator, and a plurality of parallel low voltage regulators capable of receiving an intermediate voltage from the high-voltage regulator, and capable of outputting a regulated output voltage. The intermediate voltage is no higher than a breakdown voltage of the low voltage regulators.

High voltage power management unit architecture in CMOS process

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Irvine, CA, United States of America

Hsiang-Bin Lee