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Simulation of return ratio in fully differential feedback circuits

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2 Author(s)
Hurst, P.J. ; Dept. of Electr. & Comput. Eng., California Univ., Davis, CA, USA ; Lewis, S.H.

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

Published in:

Custom Integrated Circuits Conference, 1994., Proceedings of the IEEE 1994

Date of Conference:

1-4 May 1994