A high-performance CMOS feedforward AGC circuit for a WLAN receiver / Pérez, Juan Pablo Alegre in IEEE transactions on industrial electronics, Vol. 57 N° 8 (Août 2010)  

Public ISBD [article]  inIEEE transactions on industrial electronics > Vol. 57 N° 8 (Août 2010) . - pp. 2851 - 2857 Titre : A high-performance CMOS feedforward AGC circuit for a WLAN receiver Type de document : texte imprimé Auteurs : Pérez, Juan Pablo Alegre, Auteur ; Calvo, Belén, Auteur ; Celma, Santiago, Auteur Année de publication : 2011 Article en page(s) : pp. 2851 - 2857 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Analog circuits Feedforward systems Gain control Wireless local-area network (WLAN) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a fast-settling compact feedforward automatic-gain-control (AGC) circuit suitable for use in wireless local-area network receivers with orthogonal frequency-division multiplexing (OFDM). The use of these signals introduces stringent settling-time constraints which limit the use of traditional closed-loop feedback amplifiers. Furthermore, the amplitude detection of OFDM signals cannot be performed by a typical peak detector (PD) due to their high peak-to-average power ratio; as a consequence, a novel fast-settling PD is employed to solve this task. The AGC has been implemented in a low-cost 0.35-μm CMOS technology. Supplied at 1.8 V, it operates with a power consumption of 2.4 mW at frequencies as high as 100 MHz, while its gain ranges from 0 to 22 dB in 2-dB steps through a 5-b word. The settling time of the circuit is below 2.4 μs (three symbols). DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5332298 [article] A high-performance CMOS feedforward AGC circuit for a WLAN receiver [texte imprimé] / Pérez, Juan Pablo Alegre, Auteur ; Calvo, Belén, Auteur ; Celma, Santiago, Auteur . - 2011 . - pp. 2851 - 2857. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 57 N° 8 (Août 2010) . - pp. 2851 - 2857 Mots-clés : Analog circuits Feedforward systems Gain control Wireless local-area network (WLAN) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a fast-settling compact feedforward automatic-gain-control (AGC) circuit suitable for use in wireless local-area network receivers with orthogonal frequency-division multiplexing (OFDM). The use of these signals introduces stringent settling-time constraints which limit the use of traditional closed-loop feedback amplifiers. Furthermore, the amplitude detection of OFDM signals cannot be performed by a typical peak detector (PD) due to their high peak-to-average power ratio; as a consequence, a novel fast-settling PD is employed to solve this task. The AGC has been implemented in a low-cost 0.35-μm CMOS technology. Supplied at 1.8 V, it operates with a power consumption of 2.4 mW at frequencies as high as 100 MHz, while its gain ranges from 0 to 22 dB in 2-dB steps through a 5-b word. The settling time of the circuit is below 2.4 μs (three symbols). DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5332298

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