Cascaded 4:1 AMUX-DAC Using Novel Clocking and Advanced DSP
The analog bandwidth of digital-to-analog converters (DACs) implemented in CMOS, which are generally used in commercial optical transmission systems, has been stagnating in recent years with new technology nodes. A promising concept enabling higher signal bandwidths is cascaded analog multiplexing (AMUX). In this work, we discuss the system-level aspects of a 4:1 cascaded AMUX and propose a novel clocking scheme, combining multiple advantages of previous methods. Successively, we use the scheme to demonstrate PAM-4 and PAM-8 signal generation at 60GBd using advanced DSP, quadrupling the sample rate of four DAC-generated signals with three 2:1, 130nm SiGe AMUX modules.
Authors
- Oliver Peters (ORCID: https://orcid.org/0009-0005-1081-4723)
- Friedel Gerfers (ORCID: https://orcid.org/0000-0002-0520-1923)
- Markus Grözing (ORCID: https://orcid.org/0000-0001-9870-3895)
- Ronald Freund (ORCID: https://orcid.org/0000-0001-9427-3437)
- Volker Jungnickel (ORCID: https://orcid.org/0000-0002-3135-5213)
- Tobias Tannert (ORCID: https://orcid.org/0000-0001-5613-5578)
- Christian Schmidt (ORCID: https://orcid.org/0000-0002-5689-4475)
- Georg Rademacher (ORCID: https://orcid.org/0000-0002-9156-6928)
- Jonathan Andree (ORCID: https://orcid.org/0000-0002-8963-0089)
- Sanket Khatdeo
Institutions
- University of Stuttgart (DE)
- Fraunhofer Institute for Telecommunications, Heinrich Hertz Institute (DE)
- Technische Universität Berlin (DE)
Publication Details
- Published
- 2024-09-23
- DOI
- https://doi.org/10.23919/eumic61603.2024.10732157
- Citations
- 2
- Primary Topic
- Analog and Mixed-Signal Circuit Design
- Type
- article
- Field-Weighted Citation Impact
- 0.37