Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Patent
1990-07-06
1992-07-28
Kuntz, Curtis
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
455303, H04B 110
Patent
active
051347210
ABSTRACT:
There is disclosed a noise eliminating device for an angle-modulated wave, in which a carrier amplitude fluctuation of an angle-modulated input wave is detected in a frequency difference detector to obtain a frequency variation signal corresponding to a frequency variation arising at an amplitude limiter from the carrier amplitude fluctuation. Noise caused by the amplitude fluctuation is eliminated from the angle-modulated input wave by subtracting the frequency variation signal from an output signal of the amplitude limiter after or before the frequency difference detector.
REFERENCES:
patent: 3949309 (1976-04-01), Pecar
patent: 4181892 (1979-01-01), Dilley
patent: 4408352 (1983-10-01), Dudding
patent: 4739518 (1988-04-01), Bickley et al.
patent: 4878251 (1989-10-01), Richardson
Burns Robert E.
Iwatsu Electric Co. Ltd.
Kuntz Curtis
Lobato Emmanuel J.
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