Direct conversion receiver radio frequency integrated circuit
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United States of America Patent
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Issued Date -
Mar 30, 2006
app pub date -
Sep 30, 2004
filing date -
Sep 30, 2004
priority date (Note) -
Abandoned
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Abstract
An integrated circuit includes an RF receiver has a direct-conversion down-converter and demodulator architecture with an integrated low noise amplifier (LNA) for operation in a frequency band of interest (cellular) and provisions for an off-chip LNA for operation in a second (higher) frequency band of interest (such as PCS). A baseband processor includes high-dynamic variable gain amplifiers and 7th-order elliptic low-pass filters. The IC also includes a 4 GHz PLL frequency synthesizer and a three wire series interface to external digital baseband circuits, such as a digital signal processor.
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