Methods and apparatus for tuning an LC filter
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United States of America Patent
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Jun 15, 2004
Grant Date -
Dec 11, 2003
app pub date -
Oct 15, 2002
filing date -
May 29, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A receiver, such as a television receiver, tunes an inductive ('L') and capacitive ('C') filter based on a desired frequency. The LC filter includes a plurality of inductors, configured in at least one inductive ('L') bank, and a plurality of capacitors configured in at least one capacitive ('C') bank. The inductors are selectively enabled for the LC filter by an N code, and the capacitors are selectively enabled for the LC filter by an M code. The receiver uses a functional comparator to compare offset, capacitive, inductive and frequency values to tune the LC filter. Techniques for tuning the LC filter for operation in the VHF and UHF bands are disclosed.
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