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TU Berlin

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Nima Lotfi, M.Sc.


Research Assistant

Phone: +49 30 314-78187
Room: EN434



Nima received his B.S. in electrical engineering from Guilan University, Rasht, Iran in 2008 and his M.Sc. in electrical engineering from TU Berlin in 2017. During his study at TU Berlin he worked as circuit designer at the Mikroelektronik Anwendungszentrum im Land Brandenburg (MAZBr) for 10 months and as lab assistant at the chair of High Frequency Photonics, TU Berlin (11 months). Afterwards, he joined the chair of Mixed-Signal Circuit Design (MSC), TU Berlin, as student research assistant. During his master thesis he designed a 1GS/s 12-bit Pipeline ADC. He is now working towards his Ph.D. at MSC chair, which focuses on the design and implementation of a 74GS/s ADC with an ENOB target of more than 5 bits.

Research Interests

  • Ultra high speed ADCs
  • Digital background calibration and mixed-signal phase tuning for time-interleaved ADCs
  • SAR ADCs
  • High resolution and high speed pipeline ADCs


H. Ghafarian and S. Shivapakash and S. Mortazavi and P. Scholz and N. Lotfi and F. Gerfers (2021). A 9-bit, 45mW, 0.05mm2 Source-Series-Terminated DAC Driver with Echo Canceller in 22nm CMOS for In-Vehicle Communication. IEEE Solid State Circuit Letters, 10-13.

E. Wittenhagen and M. Runge and N. Lotfi and H. Ghafarian and Y. Tian and F. Gerfers (2021). Advanced Mixed Signal Concepts Exploiting the Strong Body-Bias Effect in CMOS 22FDX®. IEEE Transactions on Circuits and Systems I: Regular Papers, 57-66.

B. Deutschmann and M. Giese and A. Jacob and N. Lotfi and F. Gerfers and S. Vehring and G. Böck (2020). PolyData/DataRace – Polymer-Integrated CMOS-Based High-Speed Communication Systems at W-Band. Wireless 100 Gbps and beyond : architectures, approaches and findings of German Research Foundation (DFG) priority programme SPP1655. IHP GmbH, 397-444.

F. Gerfers and N. Lotfi and E. Wittenhagen and H. Ghafarian and Y. Tian and M. Runge (2019). Body Biasing Techniques in CMOS FD-SOI for Mixed-Signal and RF Designs. International Conference on Electronics Circuits and Systems (ICECS). IEEE.

N. Lotfi and F. Gerfers (2019). An UWB 18.5GS/s Sampling Front-End for a 74GS/s 5-Bit ADC in 22nm FDSOI. IEEE International NEWCAS Conference (NEWCAS). IEEE.

N. Lotfi and P. Lehmann Ibáñez and M. Runge and F. Gerfers (2019). A Single-Channel 18.5 GS/s 5-bit Flash ADC using a Body-Biased Comparator Architecture in 22nm FD-SOI. IEEE International Symposium on Circuits and Systems (ISCAS). IEEE.

M. Runge and N. Lotfi and F. Gerfers (2019). Optimized Zero Placement Within Noise Coupling Transfer Functions for Oversampled ADCs. IEEE Int. Symp. on Circuits and Systems (ISCAS). IEEE.

N. Lotfi and M. Runge and F. Gerfers (2018). A MDAC Common-Mode Shifting Technique enabling Power Consumption Reduction in Pipeline ADCs. IEEE Int. Midwest Symp. on Circuits and Systems (MWSCAS). IEEE.

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