Microelectronic circuits, 2nd ed.
Microelectronic circuits, 2nd ed.
Analysis and Design of Analog Integrated Circuits
Analysis and Design of Analog Integrated Circuits
A high-level simulation and synthesis environment for ΔΣ modulators
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
A Sigma-Delta ADC design automation tool with embedded performance estimator
Integration, the VLSI Journal
Analysis of op-amp phase margin impact on SC ΣΔ modulator performance
Microelectronics Journal
Area and power optimization of high-order gain calibration in digitally-enhanced pipelined ADCs
IEEE Transactions on Very Large Scale Integration (VLSI) Systems
Analysis of the impact of high-order integrator dynamics on SC sigma-delta modulator performances
IEEE Transactions on Circuits and Systems Part I: Regular Papers
Behavioral modeling of pipeline ADC building blocks
International Journal of Circuit Theory and Applications
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This paper proposes a simple, yet accurate, analytical model forthe effect of opamp gain and dynamics (slew rate and bandwidth)on the transfer function of switched-capacitor (SC) amplifiers andintegrators. Furthermore, it demonstrates the detrimental effects of:a) the nonlinear variation in the opamp dc gain; and b) thefeedforward transmission of the feedback capacitor, on theharmonic distortion and settling behavior of these SC stages.Theseeffects, typically ignored in the behavioral simulations of SCstages, are analyzed and modeled. Thus, accurate behavioralsimulations of ΔΕ modulators or pipelined analog-to-digitalconverters (ADCs) can be performed in SIMULINK, using theproposed models for their SC building blocks (integrators oramplifiers). The proposed behavioral models are validated inHSPICE. Behavioral simulation examples are presented to illustratethe importance of such accurate modeling for low-power design.