Title :
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
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;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 2000. Digest of Papers. 2000 IEEE
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-6280-2
DOI :
10.1109/RFIC.2000.854421
