Title :
Stability Analysis of On-Chip Multi-Stage RF Power Amplifiers
Author :
Unterweissacher, Martin ; Mertens, Koen ; Brandtner, Thomas ; Pribyl, Wolfgang
Author_Institution :
TU-Graz, Graz
Abstract :
On-chip multi-stage wideband power amplifiers may show oscillations due to an unwanted feedback loop via the power distribution network. A fully differential CMOS amplifier with a bandwidth from 6 to 9 GHz that was expected to be sensitive to oscillations has been analyzed by utilizing a novel pre-layout method for estimating power grid parasitics including inductance effects. Sweeping the parameters of the power grid models enabled us to find a power grid that improved the stability of the power amplifier (PA).
Keywords :
CMOS integrated circuits; integrated circuit layout; microwave integrated circuits; microwave power amplifiers; stability; frequency 6 GHz to 9 GHz; fully differential CMOS amplifier; inductance effects; on-chip multistage RF power amplifiers; power grid models; power grid parasitics; pre-layout method; stability analysis; wideband power amplifiers; Broadband amplifiers; Distributed amplifiers; Feedback loop; Network-on-a-chip; Power amplifiers; Power grids; Power systems; Radio frequency; Radiofrequency amplifiers; Stability analysis; feedback; inductance; power amplifiers; power upplies; stability;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 2007 IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
1-4244-0530-0
Electronic_ISBN :
1529-2517
DOI :
10.1109/RFIC.2007.380926
