Variable intermediate bandwidth AM receiver
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United States of America Patent
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Jul 1, 1986
Grant Date -
N/A
app pub date -
Apr 4, 1984
filing date -
Apr 6, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
There is provided an AM receiver in which the bandwidth of an intermediate frequency amplifier is continuously varied in accordance with the received field strength. This AM receiver includes a combining circuit for combining a first AM detection output A from a narrow band intermediate frequency amplifier and a second AM detection output B from a wide band intermediate frequency amplifier to produce an AM signal output of A(1-a.sub.M)+a.sub.M B (where, 0.ltoreq.a.sub.M .ltoreq.1). By varying the coefficient a.sub.M, the bandwidth of the intermediate frequency amplifier can be equivalently continuously varied between the wide band and narrow band.
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