A high performance CMOS feedforward AGC circuit for wideband wireless receivers

Author

Alegre, J.P. ; Calvo, B. ; Celma, S.

Author_Institution

Electron. Design Group (I3A), Univ. of Zaragoza, Zaragoza

fYear

2008

fDate

June 30 2008-July 2 2008

Firstpage

1657

Lastpage

1661

Abstract

This paper presents a fast settling compact feedforward automatic gain control (AGC) suitable for use in wireless communication systems such as WLAN or Bluetooth receivers where the use of traditional closed loop feedback amplifiers forms a boundary due to the stringent settling time constraints. The AGC has been implemented in a 0.35 mum standard CMOS technology. Supplied at 1.8 V, it operates with a power consumption of 1.6 mW at frequencies as high as 100 MHz, while its gain ranges from 0 to 21 dB in 3 dB steps through a 4-bit word. The settling time of the circuit is below 0.25 mus.

Keywords

CMOS integrated circuits; automatic gain control; feedforward; radio receivers; wireless LAN; Bluetooth receivers; WLAN; automatic gain control; closed loop feedback amplifiers; high performance CMOS feedforward AGC circuit; wideband wireless receivers; wireless communication systems; Bluetooth; CMOS technology; Circuits; Energy consumption; Feedback amplifiers; Gain control; Time factors; Wideband; Wireless LAN; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics, 2008. ISIE 2008. IEEE International Symposium on

Conference_Location

Cambridge

Print_ISBN

978-1-4244-1665-3

Electronic_ISBN

978-1-4244-1666-0

Type

conf

DOI

10.1109/ISIE.2008.4677063

Filename

4677063