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Nested Miller compensation capacitor sizing rules for fast-settling amplifier design

Nested Miller compensation capacitor sizing rules for fast-settling amplifier design

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The conventional capacitor sizing criterion in nested Miller compensation is aimed at giving a third-order Butterworth response to the amplifier in unity-feedback configuration. However, this approach might not represent the best choice for fast-settling and precise amplifier designs. Proposed are damping-factor-oriented capacitance sizing rules that better allow the speed and precision requirements of these applications to be met, while also reducing occupied area and preserving closed-loop stability.

Inspec keywords: Butterworth filters; integrated circuit design; closed loop systems; feedback amplifiers; circuit stability; capacitors

Other keywords: closed-loop stability; amplifier design; damping factor; third-order Butterworth response; capacitors sizing rules; unity-feedback configuration; fast-settling amplifier; nested Miller compensation

Subjects: Filters and other networks; Amplifiers; Analogue circuit design, modelling and testing; Capacitors

References

    1. 1)
      • R.G.H. Eschauzier , J.H. Huijsing . (1995) Frequency compensation techniques for low-power operational amplifiers.
    2. 2)
      • H.C. Yang , D.J. Allstot . Considerations for fast settling operational amplifiers. IEEE Trans. Circuits Syst. , 3
    3. 3)
      • G. Palumbo , S. Pennisi . Design methodology and advances in nested-Miller compensation. IEEE Trans. Circuits Syst. I, Fundam. Theory Appl. , 7
    4. 4)
      • Marques, A.: `Settling time analysis of third order systems', Proc. IEEE Int. Conf. on Electronics, Circuits and Systems, 1998, 2, p. 505–508.
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