A power efficient MDAC design with correlated double sampling for a 2-step-flash ADC. - Rudolf Ritter; John G. Kauffman; Maurits Ortmanns (ISCAS, 2012)

Low power quantizer design in CT Delta Sigma modulators. - John G. Kauffman; Rudolf Ritter; Chao Chu; Joachim Becker; Maurits Ortmanns (ISCAS, 2013)

A DAC cell with improved ISI and noise performance using native switching for multi-bit CT Delta Sigma modulators. - John G. Kauffman; Rudolf Ritter; Chao Chu; Maurits Ortmanns (ISCAS, 2013)

Concurrent estimation of amplifier nonidealities and excess loop delay in continuous-time sigma-delta modulators. - Matthias Lorenz; Timon Brückner; Rudolf Ritter; Maurits Ortmanns (ISCAS, 2013)

Integrator swing reduction in feedback compensated Sigma-Delta modulators. - Rudolf Ritter; John G. Kauffman; Matthias Lorenz; Maurits Ortmanns (ISCAS, 2013)

Design of a high linearity Gm stage for a high speed current mode SAR ADC. - Abdelrahman Elkafrawy; Ahmad AlMarashli; Rudolf Ritter; Jens Anders; Maurits Ortmanns (ICECS, 2014)

A square root unscented Kalman filter for estimating DAC and loopfilter nonidealities in continuous-time sigma-delta modulators. - Matthias Lorenz; Timon Brückner; Rudolf Ritter; Jens Anders; Maurits Ortmanns (ISCAS, 2014)

A high open loop gain common mode feedback technique for fully differential amplifiers. - Rudolf Ritter; Matthias Lorenz; Chao Chu; Maurits Ortmanns (NEWCAS, 2014)

A Genetic Algorithm for the Estimation of Nonidealities in Continuous-Time Sigma-Delta Modulators. - Matthias Lorenz; Rudolf Ritter; Joachim Becker; Maurits Ortmanns (IEEE Trans. Circuits Syst. II Express Briefs, 2014)

A multimode CT ΔΣ-modulator with a reconfigurable digital feedback filter for semi-digital blocker/interferer rejection. - Rudolf Ritter; Patrick Torta; Lukas Dörrer; Antonio Di Giandomenico; Stefan Herzinger; Maurits Ortmanns (ESSCIRC, 2015)

Anti-aliasing filter improvement in continuous-time feedback sigma-delta modulators. - Rudolf Ritter; Matthias Lorenz; Maurits Ortmanns (ISCAS, 2015)

Continuous-Time Delta-Sigma ADCs With Improved Interferer Rejection. - Rudolf Ritter; Maurits Ortmanns (IEEE J. Emerg. Sel. Topics Circuits Syst., 2015)

Estimation of Non-Idealities in Sigma-Delta Modulators for Test and Correction Using Unscented Kalman Filters. - Matthias Lorenz; Rudolf Ritter; Jens Anders; Maurits Ortmanns (IEEE Trans. Circuits Syst. I Regul. Pap., 2015)

Phase noise vs. jitter analysis in continuous-time LP and BP ΣΔ modulators with interferers. - Jiazuo Chi; Rudolf Ritter; Johannes Wagner 003; Jens Anders; Maurits Ortmanns (ICECS, 2016)

Finite GBW in single OpAmp CT ΣΔ modulators. - Johannes Wagner 003; Stefan Reich; Rudolf Ritter; Jens Anders; Maurits Ortmanns (ICECS, 2016)

Using www.sigma-delta.de to rapidly obtain ELD compensated CT ΣΔ modulators. - Johannes Wagner 003; Rudolf Ritter; Maurits Ortmanns (ISCAS, 2016)

A 10 MHz Bandwidth, 70 dB SNDR Continuous Time Delta-Sigma Modulator With Digitally Improved Reconfigurable Blocker Rejection. - Rudolf Ritter; John G. Kauffman; Joachim Becker; Maurits Ortmanns (IEEE J. Solid State Circuits, 2016)

Overcoming Impedance-Mismatch Induced Offsets in Background Bond Wire Defect Detection. - Niklas Klefe; Rudolf Ritter; Mahdi Rajabzadeh; Thomas Mayer; Maurits Ortmanns (ISCAS, 2024)