A Tool and Methodology for AC-Stability Analysis of Continuous-Time Closed-Loop Systems

Presented are a methodology and a DFII-based tool for AC-stability analysis of a wide variety of closed-loop continuous-time (operational amplifiers and other linear circuits). The methodology used allows for easy identification and diagnostics of ac-stability problems including not only main-loop e...

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Vydáno v:Design, Automation and Test in Europe s. 204 - 208
Hlavní autoři: Milev, Momchil, Burt, Rod
Médium: Konferenční příspěvek
Jazyk:angličtina
Vydáno: Washington, DC, USA IEEE Computer Society 07.03.2005
IEEE
Edice:ACM Conferences
Témata:
AC stability
closed loop system stability
Fabrication
Frequency
frequency instability
Graphical user interfaces
Hardware > Hardware validation
Hardware > Hardware validation > Functional verification > Simulation and emulation
Hardware > Integrated circuits > Interconnect > Input > output circuits
Linear circuits
Marine technology
Mirrors
Operational amplifiers
Phase estimation
small-signal circuit stability
Stability analysis
Transient analysis
AC stability
small-signal circuit stability
frequency instability
closed loop system stability
ISBN:9780769522883, 0769522882
ISSN:1530-1591
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Popis
Shrnutí:Presented are a methodology and a DFII-based tool for AC-stability analysis of a wide variety of closed-loop continuous-time (operational amplifiers and other linear circuits). The methodology used allows for easy identification and diagnostics of ac-stability problems including not only main-loop effects but also local-instability loops in current mirrors, bias circuits and emitter or source followers without breaking the loop. The results of the analysis are easy to interpret. Estimated phase margin is readily available. Instability nodes and loops along with their respective oscillation frequencies are immediately identified and mapped to the existing circuit nodes thus offering significant advantages compared to traditional "black-box" methods of stability analysis (Transient Overshoot, Bode and Phase margin plots etc.). The tool for AC-Stability analysis is written in SKILL™ and is fully integrated in DFII™ environment. Its "push-button" graphical user interface (GUI) is easy to use and understand. The tool can be invoked directly from Composer™ schematic and does not require active Analog Artist™ session. The tool is not dependent on the use of a specific fabrication technology or Process Design Kit customization. It requires OCEAN™, Spectre™ and Waveform calculator capabilities to run.
Bibliografie:SourceType-Conference Papers & Proceedings-1
ObjectType-Conference Paper-1
content type line 25
ISBN:9780769522883
0769522882
ISSN:1530-1591
DOI:10.1109/DATE.2005.42