Title :
Direct-Conversion WCDMA Transmitter with 163dBc/Hz Noise at 190MHz Offset
Author :
Jones, Christopher ; Tenbroek, Bernard ; Fowers, Paul ; Beghein, Christophe ; Strange, Jonathan ; Beffa, Federico ; Nalbantis, Dimitris
Author_Institution :
Analog Devices, West Mailing
Abstract :
A direct-conversion multi-band TX for 1710 to 2025MHz is implemented in a 0.18mum CMOS process with post-passivation inductors. An on-chip balun and noise of -163dBc/Hz at 190MHz offset enable the PA to be driven directly with no SAW filter. A tapped attenuator provides >60dB gain control at RF.
Keywords :
CMOS integrated circuits; UHF integrated circuits; attenuators; baluns; code division multiple access; radio transmitters; 0.18 micron; 1710 to 2025 MHz; CMOS process; direct-conversion WCDMA transmitter; multiband transmitter; on chip balun; post-passivation inductor; tapped attenuator; Current supplies; Driver circuits; Gain control; Impedance matching; Multiaccess communication; Radio frequency; Radiofrequency integrated circuits; SAW filters; Transceivers; Transmitters;
Conference_Titel :
Solid-State Circuits Conference, 2007. ISSCC 2007. Digest of Technical Papers. IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
1-4244-0853-9
Electronic_ISBN :
0193-6530
DOI :
10.1109/ISSCC.2007.373431
