Analysing the Stability of Circuits Based on Operational Amplifiers by Using Frequency-Domain Simulations

Abstract

This paper analyzes in detail two of the most popular methods of determining the loop gain of OpAmp-based feedback circuits through frequency-domain Spice simulations. The limitations of the simpler method – that involves breaking the feedback loop by inserting an independent voltage source with DC=0 and AC=1 – are highlighted in comparison with a more precise method, based on the Rosenstark theorem. The discussion encompasses all types of amplifiers: the traditional (V-V) OpAmp, the Current-Feedback OpAmp (CFB-OA), the transconductance OpAmp (OTA) and the Current – Current OpAmp with asymmetric inputs (such as a second-generation current conveyor). Recommendations are made based on analytical analysis and simulation results.

Authors and Affiliations

Marius NEAG, Raul ONEŢ, Marina ŢOPA

Keywords

Related Articles

Integration of Network Coding Techniques in Future Internet Architectures

The paper introduces several new methods and experimental results on the integration of Network Coding techniques into the architectures proposed for the future Internet. Also, there are shortly presented some of the mai...

Defect detection and restoration of heritage images

One of the major problems of the old artworks is their degradation due to aging. As a result, the digitized artworks images exhibit a series of defects. Whereas scientific methods were applied to the analysis and restora...

TLS Protocol: Secure Protocol With Client Puzzles

Client puzzles are commonly proposed as a solution to denial-of-service attacks. We analyzed the TLS protocol and implement Client Puzzles algorithm. We pursued the following objectives: analyze TLS handshake protocol...

Predicting Churn In Mobile Telecommunications Industry

In today’s competitive market, the customer retention represents one of the focal concern for telecommunications companies. The telecommunications sector can be considered on the top of the list with an annual churn rat...

Multimodal Biometric Systems Overview

Biometric systems allow automatic person recognition based on physical or behavioral features which belong to a certain person. Each biometric feature has its limits and no biometric system is perfect so unimodal biometr...

Download PDF file
  • EP ID EP155080
  • DOI -
  • Views 115
  • Downloads 0

How To Cite

Marius NEAG, Raul ONEŢ, Marina ŢOPA (2010). Analysing the Stability of Circuits Based on Operational Amplifiers by Using Frequency-Domain Simulations. Acta Technica Napocensis- Electronica-Telecomunicatii (Electronics and Telecommunications), 51(2), 46-54. https://europub.co.uk/articles/-A-155080