Multi-level mixer architecture for direct conversion of FSK signals
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United States of America Patent
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Jan 25, 2000
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N/A
app pub date -
Sep 18, 1996
filing date -
Sep 18, 1996
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Abstract
A multi-level quadrature (I/Q) mixer for use in a communication system such as a paging device, where the mixer includes first and second I/Q downconversions followed by demodulation. The first I/Q downconversion converts an I/Q signal pair to a first IF, and the second I/Q downconversion converts an I/Q signal pair to a second IF. The first IF may or may not be the center frequency depending on the number of subchannels in the single channel being downconverted.
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