| Titre : | A high-performance CMOS feedforward AGC circuit for a WLAN receiver (2011) |
| Auteurs : | Pérez, Juan Pablo Alegre, Auteur ; Calvo, Belén, Auteur ; Celma, Santiago, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | IEEE transactions on industrial electronics (Vol. 57 N° 8, Août 2010) |
| Article en page(s) : | pp. 2851 - 2857 |
| Note générale : | Génie électrique |
| Langues : | Anglais |
| Index. décimale : | 621.38 (Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X) |
| Tags : | Analog circuits Feedforward systems Gain control Wireless local-area network (WLAN) |
| 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 |
