Superheterodyne radio receiver with nearby-station interference

Details Superheterodyne radio receiver with nearby-station interference Superheterodyne radio receiver with nearby-station interference

1979-10-22

1981-02-03

Bookbinder, Marc E.

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

455206, 455266, 455311, H04B 112, H04B 1500, H04B 1700, H04B 126

Patent

active

042492610

ABSTRACT:
In a superheterodyne radio receiver, by observing the RF and IF signal levels is detected an occurrence of an interference caused by an interfering strong signal of an adjacent station at a frequency close to that of a desired station signal to be received by the receiver. In case such interference is detected, a cancelling signal is fed to the RF amplifier stage to cancel out this interfering station signal, or the selectivity of the RF amplifier stage is set to be sharper in order to reject the interfering station signal.

REFERENCES:
patent: 3366884 (1968-01-01), Kurusu
patent: 3432765 (1969-03-01), Gottfried
patent: 3621401 (1971-11-01), Young, Jr.
patent: 3995220 (1976-11-01), Hansen
patent: 4126828 (1978-11-01), Kumagai

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