Superheterodyne receiver

Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion

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Details

455234, 455239, 455240, 455247, H04B 126

Patent

active

047760400

ABSTRACT:
A superheterodyne receiver in which unwanted lowering of the RF gain due to the presence of an interference signal outside the band of the desired signal is substantially eliminated. Levels of the outputs of both the RF amplifier and first mixer of the circuit are detected. The two level detection signals so produced are summed, and the sum signal applied to the gain control input terminal of the RF amplifier.

REFERENCES:
patent: 2112279 (1938-03-01), Hagenhaus
patent: 3895299 (1975-07-01), Tiedeman, Jr.
patent: 4520507 (1985-05-01), Moon
patent: 4580288 (1986-04-01), Rinderle

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