Patent
1977-05-26
1979-07-03
Griffin, Robert L.
325 11, 325435, 325439, H04B 126
Patent
active
041602129
ABSTRACT:
A radio frequency signal receiver having a plurality of serially coupled frequency converter stages adapted to convert the frequency of a signal having a frequency within a first predetermined band of frequencies to a frequency within a second, smaller predetermined band of frequencies. Each one of the frequency converter stages includes a plurality of bandpass filters, each one thereof being adapted to pass signals within a different portion of a predetermined band of frequencies, and heterodyning means for converting the frequency of a signal passed by any one of the plurality of bandpass filters to a frequency within a smaller predetermined band of frequencies.
REFERENCES:
patent: 2407212 (1946-09-01), Tunick
patent: 2926304 (1960-02-01), Fromm
patent: 3399278 (1968-08-01), Dahlman
patent: 3614627 (1971-10-01), Runyan
patent: 3678387 (1972-07-01), Wilson
patent: 3940697 (1976-02-01), Morgan
Barquist, Jr. William S.
Hutcheon Robert S.
Griffin Robert L.
Ng Jin F.
Pannone Joseph D.
Raytheon Company
Sharkansky Richard M.
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