Automatic gain control circuit with variable reaction time adjusted in an analogue manner and receiver device comprising such a circuit - Archive ouverte HAL Accéder directement au contenu
Brevet Année : 2014

Automatic gain control circuit with variable reaction time adjusted in an analogue manner and receiver device comprising such a circuit

Résumé

There is proposed an automatic gain control circuit (300a) comprising an entirely analogue feedback loop intended to adjust, in real time, the gain of the circuit according to a plurality of possible reaction time values, so as to provide an output signal having constant mean power (POUT) on the basis of a given input signal (PIN). Such a loop comprises: a variable-gain amplifier block (301); analogue means of adjustment (302) of the gain taking account of a characteristic reaction time modifiable with the aid of capacitive means (304) when they are connected to the means of adjustment; a switching element (303) which makes it possible, in the closed position, to connect the capacitive means and, in the open position, to disconnect capacitive means; analogue means of control (305) of the switching element, which are activated as a function of the level of the input signal (PIN).

Domaines

Electronique
Fichier non déposé

Dates et versions

hal-01218009 , version 1 (20-10-2015)

Identifiants

  • HAL Id : hal-01218009 , version 1

Citer

Frédéric Lucarz, Daniel Bourreau, Hexin Liu, Patrice Pajusco. Automatic gain control circuit with variable reaction time adjusted in an analogue manner and receiver device comprising such a circuit. France, N° de brevet: 2998119. 14255. 2014, pp.42. ⟨hal-01218009⟩
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