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

H - Electricity

04

B

325/101

H04B 1/16 (2006.01) H03G 3/20 (2006.01)

Patent

CA 1142597

Abstract of the Disclosure 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. -1-

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