DocumentCode :
1138221
Title :
GBOPCAD: A Synthesis Tool for High-Performance Gain-Boosted Opamp Design
Author :
Yuan, Jie ; Farhat, Nabil ; Van der Spiegel, Jan
Author_Institution :
Electr. & Syst. Eng. Dept., Univ. of Pennsylvania, Philadelphia, PA, USA
Volume :
52
Issue :
8
fYear :
2005
Firstpage :
1535
Lastpage :
1544
Abstract :
A systematic design methodology for high-performance gain-boosted opamps (GBOs) is presented. The methodology allows the optimization of the GBO in terms of ac response and settling performance and is incorporated into an automatic computer-aided design (CAD) tool, called GBOPCAD. Analytic equations and heuristics are first used by GBOPCAD to obtain a sizing solution close to the global optimum. Then, simulated annealings are used by GBOPCAD to find the global optimum. A sample opamp is designed by this tool in a 0.6- 
m CMOS process. It achieves a dc gain of 80 dB, a unity-gain bandwidth of 836 MHz with 60 
phase margin and a 0.0244% settling time of 5 ns. The sample/hold front-end of a 12-bit 50-MSample/s analog–digital converter was implemented with this opamp. It achieves a signal-to-noise ratio of 81.9 dB for a 8.1-MHz input signal.
m CMOS process. It achieves a dc gain of 80 dB, a unity-gain bandwidth of 836 MHz with 60 phase margin and a 0.0244% settling time of 5 ns. The sample/hold front-end of a 12-bit 50-MSample/s analog–digital converter was implemented with this opamp. It achieves a signal-to-noise ratio of 81.9 dB for a 8.1-MHz input signal.Keywords :
CMOS analogue integrated circuits; UHF amplifiers; UHF integrated circuits; circuit CAD; circuit optimisation; operational amplifiers; sample and hold circuits; simulated annealing; 0.6 micron; 12 bit; 5 ns; 8.1 MHz; 80 dB; 836 MHz; CMOS analogue integrated circuits; GBOPCAD; UHF amplifiers; UHF integrated circuits; automatic computer-aided design tool; circuit CAD; circuit optimisation; high-performance gain-boosted opamp design; operational amplifiers; sample and hold circuits; simulated annealing; synthesis tool; systematic design methodology; Bandwidth; CMOS process; Computational modeling; Design automation; Design methodology; Design optimization; Equations; Gain; Signal to noise ratio; Simulated annealing; Doublet; equation based; gain boost; gain-boosted opamp computer-aided design (GBOPCAD); global optimum; high-speed opamp; opamp synthesis; sample/hold (S/H) front-end; simulated annealing (SA); stability;
fLanguage :
English
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
Publisher :
ieee
ISSN :
1549-8328
Type :
jour
DOI :
10.1109/TCSI.2005.851718
Filename :
1495720
Link To Document :
