Telecommunications – Receiver or analog modulated signal frequency converter – Modulation distortion or cross talk correction or elimination
Patent
1989-08-14
1990-03-06
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Modulation distortion or cross talk correction or elimination
455296, 455311, H04B 110
Patent
active
049072935
ABSTRACT:
An adjacent channel interference suppressing system for an FM receiver which includes a first detecting device for amplifying and demodulating an intermediate frequency signal which has passed through a wide-band filter; a second detecting device for amplifying and demodulating an intermediate frequency signal which has passed through a narrow-band filter; a level adjusting device for receiving FM detection signals from the first and second detecting devices, and for complementarily and continuously adjusting the levels of the FM detection signals; and a control signal generating device for generating a control signal for controlling the level adjusting device according to the presence or absence of an adjacent channel interference.
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patent: 4673982 (1987-06-01), Tam et al.
patent: 4739518 (1988-04-01), Bickley et al.
Eisenzopf Reinhard J.
Faile Andrew
Pioneer Electronic Corporation
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