16b Third-order Sigma Delta Modulator With Reducedsensitivity To Nonidealities

Early work on third-order modulators used a cascade offirstorder loops to insure stability and achieve the theoretically-expected performance at the expense of extreme component matching and op amp gain requirements. 1.2 Third or higher-order modulators implemented in a single loop typically display...

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Bibliographic Details
Main Authors: Ribner, D.S., Baeasch, R.D., Garverick, S.L., McGrath, D.T., Krisciunas, J.E., Fuji, T.
Format: Conference Proceeding
Language:English
Subjects:
Capacitors
Circuit noise
Clocks
Delta modulation
Delta-sigma modulation
Filters
Noise cancellation
Noise shaping
Operational amplifiers
Stability
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Summary:Early work on third-order modulators used a cascade offirstorder loops to insure stability and achieve the theoretically-expected performance at the expense of extreme component matching and op amp gain requirements. 1.2 Third or higher-order modulators implemented in a single loop typically display lower sensitivity at the expense of conditional stability .3 This paper presents a cascade of a second- and first-order loop which insures unconditional stability while achieving the theoretically-expected performance in the presence of practical nonidealities.
DOI:10.1109/ISSCC.1991.689066