Determination of stability using return ratios in balanced fully differential feedback circuits

Author

Hurst, Paul J. ; Lewis, Stephen H.

Author_Institution

Dept. of Electr. & Comput. Eng., California Univ., Davis, CA, USA

Volume

42

Issue

12

fYear

1995

fDate

12/1/1995 12:00:00 AM

Firstpage

805

Lastpage

817

Abstract

This paper describes SPICE simulation techniques that can be used to find the return ratios for the differential and common-mode feedback loops in balanced, fully differential circuits. Since each of these loops may contain multiple feedback paths, conditions under which these two return ratios are sufficient for determining stability of the balanced feedback circuit are described. To allow the use of these techniques with switched-capacitor common-mode feedback circuits, a special simulation technique is presented that finds the dc bias for the return-ratio simulations

Keywords

SPICE; circuit analysis computing; circuit stability; differential amplifiers; digital simulation; feedback amplifiers; switched capacitor networks; SPICE simulation techniques; balanced fully differential feedback circuits; common-mode feedback loops; dc bias; return ratios; stability; switched-capacitor circuits; Circuit simulation; Circuit stability; Delta modulation; Feedback circuits; Feedback loop; Impedance; Operational amplifiers; SPICE; Stability analysis; Switching circuits;

fLanguage

English

Journal_Title

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7130

Type

jour

DOI

10.1109/82.476178

Filename

476178