Title :
Quad-band GSM/GPRS/EDGE polar loop transmitter
Author :
Sowlati, Tirdad ; Rozenblit, D. ; Pullela, R. ; Koh, Dawn ; Ripley, David
Author_Institution :
Skyworks, Irvine, CA, USA
Abstract :
An EDGE transmitter, using a non-linear GSM type PA, is presented. A dual feedback loop ensures robust performance even under VSWR variations. No isolator or external PA filtering is required. The EDGE spectral mask is met with an RMS EVM of <3% at 29 dBm at the antenna, corresponding to 2 dB above nominal maximum output power.
Keywords :
BiCMOS analogue integrated circuits; UHF power amplifiers; cellular radio; circuit feedback; packet radio networks; radio transmitters; 0.35 micron; 150 mA; 1800 MHz; 900 MHz; BiCMOS process; EDGE spectral mask; GSM/GPRS/EDGE transmitter; VSWR variations; dual feedback loop; high efficiency nonlinear PA; phase feedback loop; polar loop transmitter; quad-band transmitter; Amplitude modulation; Feedback loop; GSM; Ground penetrating radar; Output feedback; Phase frequency detector; Phase modulation; Radio frequency; Transmitters; Voltage-controlled oscillators;
Conference_Titel :
Solid-State Circuits Conference, 2004. Digest of Technical Papers. ISSCC. 2004 IEEE International
Print_ISBN :
0-7803-8267-6
DOI :
10.1109/ISSCC.2004.1332656
