14th Conference on Ph.D. Research in Microelectronics and Electronics

The paper entitled “Analysis of Gain and Bandwidth Limitations of Operational Amplifiers in Sigma-Delta Modulators” by T. Saalfeld, A. Meyer, E. S. Bocholt, R. Wunderlich and S. Heinen, has been included in the proceedings of the 14th Conference on Ph.D. Research in Microelectronics and Electronics!
This paper presents an analysis of the influence of the 3dB bandwidth and the DC gain of an opamp to the signal and noise transfer function of a third order Sigma-Delta modulator. Based on a mathematical analysis of the transfer functions the opamp’s influences on a complex integrator and a Tow-Thomas biquad are discussed in order to give a target specification for a circuit implementation.

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