RF filter self-alignment for multiband radio receiver
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United States of America Patent
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-
Jan 18, 1994
Grant Date -
N/A
app pub date -
Sep 6, 1991
filing date -
Sep 6, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A variable frequency RF passband filter is aligned or calibrated to maximize the sensitivity of a radio receiver using reference frequencies obtained using a fixed frequency oscillator present in a different band tuning section of a multiband receiver. The intermediate frequencies of the various band sections of the multiband receiver are selected whereby a fixed frequency source in one band corresponds to an intermediate frequency employed in the band for which the tunable RF filter is being aligned.
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