Title :
On stability in linear feedback circuits
Author_Institution :
Brooktree Div., Rockwell Semicond. Syst., San Diego, CA, USA
Abstract :
In this paper, the precise relations defining system transfer and stability functions and system phase margin are developed. These functions account for loading at input and output ports of the amplifying block due to the feedback element. They are derived using the analysis methodology of Driving Point Impedance/Signal Flow Graphs (DPI/SFG) recently introduced. With this process, stability relations are obtained from closed loop SPICE simulations removing all questions about opening loops. A summary of the DPI/SFG method is given
Keywords :
circuit feedback; circuit stability; linear network analysis; signal flow graphs; transfer functions; DPI/SFG method; SFG; closed loop SPICE simulations; driving point impedance; linear feedback circuits; signal flow graphs; stability relations; system phase margin; system transfer function; Admittance; Circuit stability; Equations; Feedback circuits; Feedback loop; Flow graphs; Impedance; Output feedback; Transfer functions; Voltage;
Conference_Titel :
Circuits and Systems, 1997. Proceedings of the 40th Midwest Symposium on
Conference_Location :
Sacramento, CA
Print_ISBN :
0-7803-3694-1
DOI :
10.1109/MWSCAS.1997.666031
