A fast compact CMOS feedforward automatic gain control circuit

Author

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

Author_Institution

Electron. Design Group (I3 A), Univ. of Zaragoza, Zaragoza

fYear

2008

fDate

18-21 May 2008

Firstpage

1504

Lastpage

1507

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 18 dB. The settling time of the circuit is below 0.25 mus.

Keywords

Bluetooth; CMOS integrated circuits; automatic gain control; feedback amplifiers; radio receivers; radiofrequency amplifiers; wireless LAN; Bluetooth receivers; WLAN; automatic gain control circuit; closed loop feedback amplifiers; compact CMOS feedforward; gain 0 dB to 1.8 dB; power 1.6 mW; power consumption; time 0.25 mus; voltage 1.8 V; wireless communication systems; Bluetooth; CMOS technology; Circuits; Energy consumption; Feedback amplifiers; Frequency; Gain control; Time factors; Wireless LAN; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2008. ISCAS 2008. IEEE International Symposium on

Conference_Location

Seattle, WA

Print_ISBN

978-1-4244-1683-7

Electronic_ISBN

978-1-4244-1684-4

Type

conf

DOI

10.1109/ISCAS.2008.4541715

Filename

4541715