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- Matthias Keller, Alexander Buhmann, Jens Sauerbrey, Maurits Ortmanns, Yiannos Manoli
- IEEE Transactions on Circuits and Systems Iâ€¦
- 2008

Excess loop delay (ELD) is well known for its detrimental effect on the performance and stability of continuous-time sigma-delta modulators. A detailed analysis on the most recently publishedâ€¦ (More)

- Matthias Keller, Alexander Buhmann, Maurits Ortmanns, Yiannos Manoli
- 2007 50th Midwest Symposium on Circuits andâ€¦
- 2007

This paper deals with a systematic approach to the synthesis of continuous-time cascaded sigma-delta modulators. Based on a system-theoretical model, a detailed derivation of the digital cancellationâ€¦ (More)

- Fabian Henrici, Joachim Becker, Alexander Buhmann, Maurits Ortmanns, Yiannos Manoli
- 2007 IEEE International Symposium on Circuits andâ€¦
- 2007

Field programmable analog filters (FPAAs) often lack the necessary bandwidth for high performance applications. This paper presents an FPAA based on Gm-C filters, which achieves routing without theâ€¦ (More)

- Matthias Keller, Alexander Buhmann, Maurits Ortmanns, Yiannos Manoli
- 2007 IEEE International Symposium on Circuits andâ€¦
- 2007

This paper presents a method for the discrete-time (DT) simulation of continuous-time (CT) sigma-delta modulators. Via the application of lifting, correction values for each state variable of aâ€¦ (More)

This paper presents a new excess loop delay (ELD) compensated micro-electro-mechanical sigma-delta modulator (Î£âˆ†M) incorporating a gyroscope in series with a second-order electrical bandpass filter.â€¦ (More)

- Alexander Buhmann, Matthias Keller, Maurits Ortmanns, Yiannos Manoli
- 2007 50th Midwest Symposium on Circuits andâ€¦
- 2007

Circuit imperfections such as non-ideal opamp behaviour and coefficient mismatch are known to drastically reduce the performance of continuous-time delta-sigma modulators. In this paper, we present aâ€¦ (More)

- Matthias Keller, Alexander Buhmann, Maurits Ortmanns, Yiannos Manoli
- 2007 IEEE International Symposium on Circuits andâ€¦
- 2007

This paper deals with one of the most outstanding advantages of continuous-time sigma-delta modulators compared to their discrete-time counterparts: the implicit antialiasing feature. Althoughâ€¦ (More)

- Matthias Keller, Alexander Buhmann, Friedel Gerfers, Maurits Ortmanns, Yiannos Manoli
- IEEE Transactions on Circuits and Systems Iâ€¦
- 2007

This paper deals with one of the most outstanding advantages of continuous-time (CT) sigma-delta modulators compared to their discrete-time counterparts: the implicit anti-aliasing feature (AAF).â€¦ (More)

- Thomas Northemann, Michael Maurer, Stefan Rombach, Alexander Buhmann, Yiannos Manoli
- Proceedings of 2010 IEEE International Symposiumâ€¦
- 2010

This paper demonstrates a MEMS gyroscope system with extensive use of sigma-delta (Î£Î”) modulation in both, primary and secondary modes. The primary loop has a bandpass Î£Î”-digital-to-analog converterâ€¦ (More)

- Alexander Buhmann, Matthias Keller, Michael Maurer, Maurits Ortmanns, Yiannos Manoli
- 2007 50th Midwest Symposium on Circuits andâ€¦
- 2007

This paper will present a MATLABTM toolbox for the discrete-time (DT) simulation of continuous-time (CT) sigma-delta modulators. Via the application of lifting, correction values for the state vectorâ€¦ (More)