Analog-to-digital converter, signal processor, and method for analog-to-digital conversion R Ritter, M Schimper, W Schelmbauer, M Ortsmanns US Patent 8,760,330, 2014 | 27 | 2014 |

Telemetry for implantable medical devices: Part 1-media properties and standards R Ritter, J Handwerker, T Liu, M Ortmanns IEEE solid-state circuits magazine 6 (2), 47-51, 2014 | 27 | 2014 |

A 10 MHz Bandwidth, 70 dB SNDR Continuous Time Delta-Sigma Modulator With Digitally Improved Reconfigurable Blocker Rejection R Ritter, JG Kauffman, J Becker, M Ortmanns JSSC, 2016 | 25 | 2016 |

A multimode CT ΔΣ-modulator with a reconfigurable digital feedback filter for semi-digital blocker/interferer rejection R Ritter, P Torta, L Dörrer, A Di Giandomenico, S Herzinger, M Ortmanns ESSCIRC Conference 2015-41st European Solid-State Circuits Conference …, 2015 | 10 | 2015 |

Continuous-Time Delta-Sigma ADCs With Improved Interferer Rejection R Ritter, M Ortmanns JETCAS, 2015 | 8 | 2015 |

Anti-aliasing filter improvement in continuous-time feedback sigma-delta modulators R Ritter, M Lorenz, M Ortmanns 2015 IEEE International Symposium on Circuits and Systems (ISCAS), 325-328, 2015 | 7 | 2015 |

A DAC cell with improved ISI and noise performance using native switching for multi-bit CT Delta Sigma modulators JG Kauffman, R Ritter, C Chu, M Ortmanns 2013 IEEE International Symposium on Circuits and Systems (ISCAS), 574-577, 2013 | 7 | 2013 |

Concurrent estimation of amplifier nonidealities and excess loop delay in continuous-time sigma-delta modulators M Lorenz, T Brückner, R Ritter, M Ortmanns 2013 IEEE International Symposium on Circuits and Systems (ISCAS), 1031-1034, 2013 | 7 | 2013 |

Finite GBW in single opamp CT ΣΔ modulators J Wagner, S Reich, R Ritter, J Anders, M Ortmanns 2016 IEEE International Conference on Electronics, Circuits and Systems …, 2016 | 6 | 2016 |

STF engineering in CT Sigma-Delta modulators using www. sigma-delta. de J Wagner, R Ritter, M Ortmanns 2016 12th Conference on Ph. D. Research in Microelectronics and Electronics …, 2016 | 6 | 2016 |

Estimation of non-idealities in sigma-delta modulators for test and correction using unscented Kalman filters M Lorenz, R Ritter, J Anders, M Ortmanns IEEE Transactions on Circuits and Systems I: Regular Papers 62 (5), 1240-1249, 2015 | 6 | 2015 |

A genetic algorithm for the estimation of nonidealities in continuous-time sigma–delta modulators M Lorenz, R Ritter, J Becker, M Ortmanns IEEE Transactions on Circuits and Systems II: Express Briefs 61 (6), 388-392, 2014 | 5 | 2014 |

Phase noise vs. jitter analysis in continuous-time LP and BP ΣΔ modulators with interferers J Chi, R Ritter, J Wagner, J Anders, M Ortmanns 2016 IEEE International Conference on Electronics, Circuits and Systems …, 2016 | 4 | 2016 |

Design of a high linearity Gm stage for a high speed current mode SAR ADC A Elkafrawy, A AlMarashli, R Ritter, J Anders, M Ortmanns 2014 21st IEEE International Conference on Electronics, Circuits and Systems …, 2014 | 4 | 2014 |

A square root unscented kalman filter for estimating dac and loopfilter nonidealities in continuous-time sigma-delta modulators M Lorenz, T Brückner, R Ritter, J Anders, M Ortmanns 2014 IEEE International Symposium on Circuits and Systems (ISCAS), 1159-1162, 2014 | 3 | 2014 |

Integrator swing reduction in feedback compensated sigma-delta modulators R Ritter, JG Kauffman, M Lorenz, M Ortmanns 2013 IEEE International Symposium on Circuits and Systems (ISCAS), 2026-2029, 2013 | 3 | 2013 |

A power efficient MDAC design with correlated double sampling for a 2-step-flash ADC R Ritter, JG Kauffman, M Ortmanns 2012 IEEE International Symposium on Circuits and Systems (ISCAS), 3138-3141, 2012 | 2 | 2012 |

Using www. sigma-delta. de to rapidly obtain ELD compensated CT ΣΔ modulators J Wagner, R Ritter, M Ortmanns 2016 IEEE International Symposium on Circuits and Systems (ISCAS), 1498-1501, 2016 | 1 | 2016 |

Delta-Sigma modulators with enhanced interferer cancellation in receiver applications RHF Ritter Universität Ulm, 2016 | 1 | 2016 |

A high open loop gain common mode feedback technique for fully differential amplifiers R Ritter, M Lorenz, C Chu, M Ortmanns 2014 IEEE 12th International New Circuits and Systems Conference (NEWCAS …, 2014 | 1 | 2014 |