Title :
A model of op-amp circuits
Author_Institution :
Dept. of Electr. Eng., State Univ. of New York, Stony Brook, NY, USA
fDate :
10/1/1991 12:00:00 AM
Abstract :
In stability analysis, op-amp circuits are often modeled as single-loop feedback systems, as shown with a finite open-loop gain A in the forward path and β in the feedback path. The author proposes a different model that has two feedback loops. The model is useful in stability of op-amp circuits and in determining the oscillation conditions of Wien-bridge oscillators. The model has one positive feedback loop and one negative loop. The model is easy to develop and offers better insight into op-amp circuits than the single-loop model
Keywords :
active networks; bridge circuits; feedback; oscillators; stability; Wien-bridge oscillators; double-loop model; feedback path; finite open-loop gain; forward path; negative loop; op-amp circuits; oscillation conditions; positive feedback loop; single-loop feedback systems; stability analysis; Circuits and systems; Controllability; Delay; Digital filters; Filtering theory; Inspection; Linear systems; Observability; Operational amplifiers; Transfer functions;
Journal_Title :
Circuits and Systems, IEEE Transactions on
