Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Patent
1987-08-12
1988-10-04
Masinick, Michael A.
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
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
Ichikawa Toshihito
Iwasaki Hideki
Masinick Michael A.
Pioneer Electronic Corporation
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