Publication result detail

Design and Implementation of a Compact Digital Frequency Modulator in an ASIC

KOLÁŘ, O.; KRÁL, J.; KUBÍČEK, M.; POVALAČ, A.

Original Title

Design and Implementation of a Compact Digital Frequency Modulator in an ASIC

English Title

Design and Implementation of a Compact Digital Frequency Modulator in an ASIC

Type

Paper in proceedings (conference paper)

Original Abstract

In this paper, we present a digital frequency modulator designed and fabricated within the Tiny Tapeout application-specific integrated circuit (ASIC) framework, which serves as a hands-on example of ASIC development for radio electronics education. To overcome the constraints of the framework, namely limited silicon area and clock frequency, we propose a direct digital synthesis (DDS) frequency modulator featuring a highly area-optimized phase-to-sine amplitude algorithm. Additionally, we present a complete hardware prototype of the modulator, developed for both demonstration and educational purposes. For ease of use, the prototype includes a USB interface that functions as a standard USB sound card, enabling the transmission of a radio frequency-modulated audio signal that resembles FM radio broadcasting.

English abstract

In this paper, we present a digital frequency modulator designed and fabricated within the Tiny Tapeout application-specific integrated circuit (ASIC) framework, which serves as a hands-on example of ASIC development for radio electronics education. To overcome the constraints of the framework, namely limited silicon area and clock frequency, we propose a direct digital synthesis (DDS) frequency modulator featuring a highly area-optimized phase-to-sine amplitude algorithm. Additionally, we present a complete hardware prototype of the modulator, developed for both demonstration and educational purposes. For ease of use, the prototype includes a USB interface that functions as a standard USB sound card, enabling the transmission of a radio frequency-modulated audio signal that resembles FM radio broadcasting.

Keywords

FM; frequency modulation; modulator; ASIC; Tiny Tapeout; sine approximation; digital; implementation; case study

Key words in English

FM; frequency modulation; modulator; ASIC; Tiny Tapeout; sine approximation; digital; implementation; case study

Authors

KOLÁŘ, O.; KRÁL, J.; KUBÍČEK, M.; POVALAČ, A.

Released

23.05.2025

Publisher

IEEE

Location

NEW YORK

ISBN

979-8-3315-4447-8

Book

2025 35th International Conference Radioelektronika (RADIOELEKTRONIKA)

ISBN

2767-9969

Pages count

6

URL

https://ieeexplore.ieee.org/document/11008408

BibTex

@inproceedings{BUT197990,
  author="Ondřej {Kolář} and Jan {Král} and Michal {Kubíček} and Aleš {Povalač}",
  title="Design and Implementation of a Compact Digital Frequency Modulator in an ASIC",
  booktitle="2025 35th International Conference Radioelektronika (RADIOELEKTRONIKA)",
  year="2025",
  pages="6",
  publisher="IEEE",
  address="NEW YORK",
  doi="10.1109/RADIOELEKTRONIKA65656.2025.11008408",
  isbn="979-8-3315-4447-8",
  url="https://ieeexplore.ieee.org/document/11008408"
}