Mixed Signal Circuit Design

Nima Lotfi, MSc.

 

 

 

Nima Lotfi

Research Assistant

nima.lotfi@tu-berlin.de

+49 30 314-78187

Organization name Mixed Signal Circuit Design
Office EN4
Building E-N
Room E-N 434

Research Assistant

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

Vita

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.

 

    Publikationen

    2023

    Wittenhagen, E.; Kurth, P.; Lotfi, N.; Hecht, U.; Edler, J.; Scholz, P.; Gerfers, F.
    A 12 GS/s RF-Sampler Employing Inductive Peaking in 22 nm FD-SOI CMOS
    18th European Microwave Integrated Circuits Conference (EuMIC)
    Publisher: IEEE
    2023
    Wittenhagen, E.; Kurth, P.; Hecht, U.; Buballa, F.; Linnhoff, S.; Lotfi, N.; Gerfers, F.
    A 12 GS/s RF-Sampler Employing Inductive Peaking with >57 dB |THD| and >49.3 dB SNDR in 22 nm FD-SOI CMOS
    21th IEEE Interregional NEWCAS Conference (NEWCAS)
    Publisher: IEEE
    2023
    Lotfi, N.; Scholz, P.; Gerfers, F.
    The Fastest CMOS Single-Channel 5-bit Flash ADC Operating at 18.5 GS/s in 22 nm FD-SOI
    2023 18th European Microwave Integrated Circuits Conference (EuMIC)
    Publisher: IEEE
    2023

    2022

    Lotfi, N.; Scholz, P.; Gerfers, F.
    A 44 GHz-BW 18.5 GS/s Sampling Front-End Robust to Power Supply and Common-Mode Variations in 22 nm FDSOI
    2022 17th European Microwave Integrated Circuits Conference (EuMIC)
    Publisher: IEEE
    2022
    Artz, P.J.; Edler, J.; Wittenhagen, E.; Lotfi, N.; Gerfers, F.
    Workshop WM02 talk: High-Speed ADC (>20 GS/s) with High Resolution (≥10 bit) for Low-IF Receiver in 22nm FDSOI
    IEEE European Microwave Week (EuMW) 2021
    2022

    2021

    Ghafarian, H.; Shivapakash, S.; Mortazavi, S.; Scholz, P.; Lotfi, N.; Gerfers, F.
    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, 4 :10-13
    2021
    Wittenhagen, E.; Runge, M.; Lotfi, N.; Ghafarian, H.; Tian, Y.; Gerfers, F.
    Advanced Mixed Signal Concepts Exploiting the Strong Body-Bias Effect in CMOS 22FDX®
    IEEE Transactions on Circuits and Systems I: Regular Papers, 68 (1) :57-66
    2021

    2020

    Deutschmann, B.; Giese, M.; Jacob, A.; Lotfi, N.; Gerfers, F.; Vehring, S.; Böck, G.
    PolyData/DataRace – Polymer-Integrated CMOS-Based High-Speed Communication Systems at W-Band
    In Rolf Kraemer and Stefan Scholz, Editor
    Publisher: IHP GmbH
    2020
    ISBN
    978-3-96439-003-5

    2019

    Lotfi, N.; Ibáñez, P. Lehmann; Runge, M.; Gerfers, F.
    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)
    Publisher: IEEE
    2019
    Lotfi, N.; Gerfers, F.
    An UWB 18.5GS/s Sampling Front-End for a 74GS/s 5-Bit ADC in 22nm FDSOI
    IEEE International NEWCAS Conference (NEWCAS)
    Publisher: IEEE
    2019
    Gerfers, F.; Lotfi, N.; Wittenhagen, E.; Ghafarian, H.; Tian, Y.; Runge, M.
    Body Biasing Techniques in CMOS FD-SOI for Mixed-Signal and RF Designs
    International Conference on Electronics Circuits and Systems (ICECS)
    Publisher: IEEE
    2019
    Runge, M.; Lotfi, N.; Gerfers, F.
    Optimized Zero Placement Within Noise Coupling Transfer Functions for Oversampled ADCs
    IEEE Int. Symp. on Circuits and Systems (ISCAS)
    Publisher: IEEE
    2019

    2018

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