Evaluation of single-bit sigma-delta modulator DAC for electrical impedance spectroscopy. - Mahdi Rajabzadeh; Joachim Becker; Maurits Ortmanns (BioCAS, 2017)

A fully integrated charge pump using parasitics to increase the usable capacitance by 25 % and the efficiency by up to 18 % with poly-poly capacitors. - Hossein Ghafarian; Christian Moranz; Mahdi Rajabzadeh; Joachim Leicht; Yiannos Manoli (MWSCAS, 2017)

Comparison Study of Integrated Potentiostats: Resistive-TIA, Capacitive-TIA, CT ΣΔ Modulator. - Mahdi Rajabzadeh; Denis Djekic; Matthias Haeberle; Joachim Becker; Jens Anders; Maurits Ortmanns (ISCAS, 2018)

A 24-Ch. Multi-Electrode Array Allowing Fast EIS to Determine Transepithelial Electrical Resistance. - Mahdi Rajabzadeh; Jonathan Ungethuem; Andreas Herkle; Carolin Schilpp; M. Fauler; Oliver Wittekindt; Maurits Ortmanns (BioCAS, 2019)

An Integrated Readout for Current Sensing based on a Σ∆ Modulator with Switched Capacitor Feedback. - Mahdi Rajabzadeh; Matthias Häberle; Ankesh Jain; Maurits Ortmanns (ESSCIRC, 2019)

Comparison of Different Precision Pseudo Resistor Realizations in the DC-Feedback of Capacitive Transimpedance Amplifiers. - Matthias Häberle; Denis Djekic; Mahdi Rajabzadeh; Georg E. Fantner; Klaus Lips; Maurits Ortmanns; Jens Anders (ICECS, 2019)

An Evaluation Study of Various Excitation Signals for Electrical Impedance Spectroscopy. - Mahdi Rajabzadeh; Jonathan Ungethuem; Holger Mandry; Carolin Schilpp; Oliver Wittekindt; Maurits Ortmanns (ISCAS, 2019)

Comparison of Direct Digitization Current Sensing Circuits for EIS. - Mahdi Rajabzadeh; Matthias Häberle; Maurits Ortmanns (PRIME, 2019)

Comparison Study of DAC Realizations in Current Input CTΣΔ Modulators. - Mahdi Rajabzadeh; Matthias Häberle; Joachim Becker; Maurits Ortmanns (IEEE Trans. Circuits Syst. II Express Briefs, 2021)

An Integrator-Differentiator Transimpedance Amplifier Using Tunable Linearized High-Value Multi-Element Pseudo-Resistors. - Matthias Häberle; Denis Djekic; Daniel Krüger; Mahdi Rajabzadeh; Maurits Ortmanns; Jens Anders (IEEE Trans. Circuits Syst. I Regul. Pap., 2022)

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