Radio-frequency head having a self-adaptive dynamic range

Details Radio-frequency head having a self-adaptive dynamic range Radio-frequency head having a self-adaptive dynamic range

1980-03-17

1981-05-26

Bookbinder, Marc E.

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

455249, 455250, 455251, 455318, H04B 126

Patent

active

042702224

ABSTRACT:
An HF receiver head having high sensitivity and capable of receiving variable-level input signals has characteristics which are adjusted as a function of the received signal level. The HF head essentially comprises a generator for delivering control voltages as a function of the amplitude of the received signals. The dynamic range of the input amplifier and of the mixer can thus be varied as a function of the received signal level up to a predetermined threshold value. Above this threshold value, an input attenuator assumes increasing values which makes it possible to attain a wide dynamic range of the HF head under optimum conditions of sensitivity and linearity.

REFERENCES:
patent: 1905946 (1933-04-01), Mathieu et al.
patent: 2144935 (1939-01-01), Roberts
patent: 3052853 (1962-09-01), Smith
patent: 3104357 (1963-09-01), Birkenes
patent: 3394315 (1968-07-01), Gray
patent: 3457514 (1969-07-01), Lancaster
patent: 3518585 (1970-06-01), Wilcox
patent: 3805162 (1974-04-01), Hoffman et al.
patent: 3946318 (1976-03-01), Gruber

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