Mixed Signal Circuit Design

Urs Hecht, MSc.

 

 

 

Urs Kaspar Hecht

Research Assistant

hecht@tu-berlin.de

+49 30 314-25882

Organization name Mixed Signal Circuit Design
Office EN4
Building E-N
Room E-N 418

Research Assistant

Research Interests

  • High speed Digital to Analog Converters
  • Vertical Cavity LASER Diode Drivers
  • Equalization for nonlinear Systems

Vita

Urs Hecht received the B.Sc. and the M.Sc. of electrical engineering in 2016 and 2018, respectively, from the Technische Universität Berlin.
During his studies he concentrated on analogue circuit design. Highlights were the design of a Ultra-Low-Power CMOS Temperature Sensor (Bachelor’s Thesis), a two-stage telescopic OTA and a 150 MS/s 1.5 Bit 11 ENOB Pipeline ADC Stage in 28 nm CMOS.
His Master’s Thesis “56 GBaud PAM-4 CMOS Transmitter Architectures” concentrated on finding the optimal transmitter equalization architecture to push the boundaries of VCSEL-based optical communication systems beyond the current state of the art.
In 2018, he was awarded the Friedrich-Wilhelm Gundlach-Preis by the "Verein der Freunde der Hochfrequenztechnik an der TU Berlin e.V." for the reasurch during the period of his Master's Thesis.
He joined the chair of mixed-signal circuit design in May 2018.

Publikationen

2023

Hecht, U.; Ordouei, H.; Ledentsov, N.; Scholz, P.; Kurth, P.; Titkov, I.E.; Ledentsov, N.N.; Gerfers, F.
A 0.4 pJ/bit NRZ Voltage Mode VCSEL Driver for up to 224 Gbit/s SWDM Links
Optical Fiber Communication Conference (OFC) 2023
Publisher: Optical Society of America (OSA)
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
Kurth, P.; Hecht, U.; Buballa, F.; Linnhoff, S.; Ordouei, H.; Gerfers, F.
A Charge Pump for Sub-Sampling Phase-Locked Loops with Virtual Reference Frequency Doubling
2023 IEEE International Symposium on Circuits and Systems (ISCAS), Page 1-5
Publisher: IEEE
2023
Hecht, U.; Ledentsov Jr., N.; Ordouei, H.; Kurth, P.; Scholz, P.; Ledentsov, N.; Gerfers, F.
Digital Non-Linear Transmitter Equalization for PAM-N-Based VCSEL Links Enabling Robust Data Transmission of 100 Gbit/s and Beyond
Photonics, 10 (3) :280
2023
OpenAccess
Hecht, U.; Ordouei, H.; Ledentsov Jr., N.; Scholz, P.; Kurth, P.; Ledentsov, N.; Gerfers, F.
True Voltage-Mode NRZ VCSEL Transmitter enabling 60 Gbit/s at 0.37 pJ/bit in 22 nm FDSOI
IEEE 49th European Solid State Circuits Conference (ESSCIRC)
Publisher: IEEE
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

2022

Kurth, P.; Nickel, P.; Hecht, U.; Gerfers, F.
A Divider-less General PLL Lock Assist and Automatic Frequency Calibration System for Millimeter-Wave Sub-Sampling Phase-Locked Loops
29th IEEE International Conference on Electronics, Circuits and Systems (ICECS), Page 1-4
Publisher: IEEE
2022
Hecht, U.; Wittenhagen, E.; Cirit, H.; Behtash, S.; Venkataram, S.; Gerfers, F.
PAM-4/6/8 Performance and Power Analysis for Next Generation 224Gbit/s Links
IEEE International Symposium on Circuits and Systems (ISCAS)
Publisher: IEEE
2022
Wittenhagen, E.; Hecht, U.; Cirit, H.; Behtash, S.; Venkataram, S.; Gerfers, F.
A 224 Gbit/s Transceiver Front-end Design for Next Generation Data Centers
29th International Conference on Electronics, Circuits and Systems (ICECS)
Publisher: IEEE
2022
Kurth, P.; Misselwitz, K.; Scholz, P.; Hecht, U.; Gerfers, F.
A 0.007 mm2 48 - 53 GHz Low-Noise LC-Oscillator using an Ultra-Compact High-Q Resonator
14th German Microwave Conference (GeMiC), Page 104-107
Publisher: IEEE
2022

2021

Kurth, P.; Misselwitz, K.; Hecht, U.; Gerfers, F.
A 56 GHz 19 fs RMS-Jitter Sub-Sampling Phase-Locked Loop for 112 Gbit/s Transceivers
IEEE International Symposium on Circuits and Systems (ISCAS), Page 1-5
Publisher: IEEE
2021
Kurth, P.; Hecht, U.; Wittenhagen, E.; Gerfers, F.
A Divider-less Automatic Frequency Calibration for Millimeter-Wave Sub-Sampling Phase-Locked Loops
IEEE International Midwest Symposium on Circuits and Systems (MWSCAS), Page 718-721
Publisher: IEEE
2021
Hecht, U.
VCSEL-Based Optical Transmitters Above 100Gb/s
INTERNATIONAL SOLID-STATE CIRCUITS CONFERENCE
Publisher: IEEE
2021

2020

Kurth, P.; Misselwitz, K.; Hecht, U.; Gerfers, F.
A Transmission-Line-based Phase Shifter for High-Speed, Ultra-Low-Power N-PSK Transmitters
27th International Conference on Electronics, Circuits and Systems (ICECS)
Publisher: IEEE
2020
Ledentsov, N. N.; Shchukin, V.A.; Kalosha, V.P.; Ledentsov, N.; Chorchos, L.; Turkiewicz, J. P.; Hecht, U.; Kurth, P.; Gerfers, F.; Lavrencik, J.; Varughese, S.; Ralph, S. E.
Optical Interconnects Using Single-Mode and Multi-Mode VCSEL and Multi-Mode Fiber
Optical Fiber Communication Conference (OFC) 2020, Page M3D.1
Publisher: Optical Society of America
2020
Ledentsov, N.; Chorchos, L.; Makarov, O.; Kropp, J.-R.; Shchukin, V.; Kalosha, V. P.; Hecht, U.; Kurth, P.; Gerfers, F.; Turkiewicz, J. P.; Ledentsov, N. N.
Oxidation stress induced birefringence in vertical cavity surface emitting lasers
In Luke A. Graham and Chun Lei, Editor, Vertical-Cavity Surface-Emitting Lasers XXIVVolume11300, Page 107 – 114
International Society for Optics and Photonics
In Luke A. Graham and Chun Lei, Editor
Publisher: SPIE
2020
Hecht, U.; Ledentsov, N.; Chorchos, Ł.; Kurth, P.; Ledentsov, N. N.; Gerfers, F.
Up to 30-Fold BER Improvement Using a Data-Dependent FFE Switching Technique for 112Gbit/s PAM-4 VCSEL Based Links
Optical Fiber Communication Conference (OFC) 2020, Page T3I.6
Publisher: Optical Society of America
2020

2019

Hecht, U.; Ledentsov, N.; Scholz, P.; Agustin, M.; Schulz, P.; Ledentsov, N.N.; Gerfers, F.
Non-Linear PAM-4 VCSEL Equalization and 22 nm SOI CMOS DAC for 112 Gbit/s Data Transmission
12th German Microwave Conference (GeMiC)
Publisher: IEEE
2019