Title :
Simulation of return ratio in fully differential feedback circuits
Author :
Hurst, Paul J. ; Lewis, Stephen H.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Davis, CA, USA
Abstract :
This paper describes SPICE simulation techniques that can be used to find the gain and phase margins of perfectly balanced, fully differential circuits. The basis of the techniques is the calculation of the return ratios of the differential- and common-mode feedback loops. The closed-loop d.c. operating point is preserved during the return-ratio simulations so that SPICE properly computes the linear small-signal models associated with all nonlinear devices
Keywords :
SPICE; circuit analysis computing; differential amplifiers; digital simulation; feedback amplifiers; SPICE simulation techniques; closed-loop DC operating point; common-mode feedback loops; differential-mode feedback loops; fully differential feedback circuits; gain margins; linear small-signal models; nonlinear devices; phase margins; return ratio; Circuit simulation; Circuit stability; Computational modeling; Delta modulation; Feedback circuits; Feedback loop; Operational amplifiers; SPICE; Stability analysis; Voltage;
Conference_Titel :
Custom Integrated Circuits Conference, 1994., Proceedings of the IEEE 1994
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-1886-2
DOI :
10.1109/CICC.1994.379773
