Analog baseband IC for use in direct conversion W-CDMA receivers

Author

Goldfarb, M. ; Palmer, W. ; Murphy, T. ; Clarke, R. ; Gilbert, B. ; Itoh, K. ; Katsura, T. ; Hayashi, R. ; Nagano, H.

Author_Institution

Analog Devices Inc., Wilmington, MA, USA

fYear

2000

fDate

10-13 June 2000

Firstpage

79

Lastpage

82

Abstract

A 0.6 /spl mu/m BiCMOS analog baseband IC that enables a direct conversion W-CDMA receiver is described. Two diversity I/Q channels provide 87 dB of voltage gain, controllable in 1-dB steps. A 2 MHz low pass filter, synchronized to an external RC network, provides an accurate rejection mechanism against adjacent channel interference. A log amp provides a "Fast-RSSI" function for rapidly selecting gain settings. Low DC current (<5 mA/path), low input noise (<4 nV/Hz/sup 1/2/), and a high P3dB (-20 dBVrms) are achieved.

Keywords

BiCMOS analogue integrated circuits; UHF integrated circuits; adjacent channel interference; code division multiple access; diversity reception; integrated circuit noise; mobile radio; radio receivers; 0.6 micron; 2 MHz; 87 dB; BiCMOS; DC current; Fast-RSSI function; P3dB; adjacent channel interference; analog baseband IC; direct conversion W-CDMA receivers; diversity I/Q channels; external RC network; input noise; log amp; low pass filter; rejection mechanism; voltage gain; Analog integrated circuits; Attenuation; Baseband; BiCMOS integrated circuits; Gain control; Low pass filters; Low-noise amplifiers; Multiaccess communication; Radiofrequency amplifiers; Radiofrequency integrated circuits;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio Frequency Integrated Circuits (RFIC) Symposium, 2000. Digest of Papers. 2000 IEEE

Conference_Location

Boston, MA, USA

ISSN

1529-2517

Print_ISBN

0-7803-6280-2

Type

conf

DOI

10.1109/RFIC.2000.854421

Filename

854421