A study on the SNR in higher Nyquist zone of 1-bit low-pass delta-sigma RZ-DAC

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

In this paper, we discuss the usage of image signal in the higher order Nyquist zone of 1-bit low-pass Delta-Sigma (LP-ΔΣ) return-to-zero (RZ)-DAC transmitter. We made a comparison between 3 types of 1-bit DAC signals (non-return-to-zero (NRZ), 50% duty RZ and 25% duty RZ in the simulation and the measurement. By using 1 Vp-p / 1 Gbps DAC output, we observe that the SNR degradation occurs in higher order (more than 5) Nyquist zone in the measurement, but the SNR of more than 50 dB can be obtained in the 7th Nyquist zone (around 3 GHz) for 50% duty RZ and 25% duty RZ conditions. From this measurement, higher SNR in higher Nyquist zone can be obtained by using 50% duty RZ-DAC output than that of 25% duty. Based on this study, we have successfully generated a 24 GHz-band signal by using a 1 Vp-p / 8 Gbps 50% duty RZ-DAC output and confirmed that the SNR of more than 40 dB can be obtained in the 7th Nyquist zone (around 24 GHz).

Original languageEnglish
Title of host publication2017 Asia Pacific Microwave Conference, APMC 2017 - Proceedings
EditorsIdnin Pasya
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages918-921
Number of pages4
ISBN (Electronic)9781538606407
DOIs
Publication statusPublished - 2017 Jun 28
Event2017 IEEE Asia Pacific Microwave Conference, APMC 2017 - Kuala Lumpur, Malaysia
Duration: 2017 Nov 132017 Nov 16

Publication series

NameAsia-Pacific Microwave Conference Proceedings, APMC

Other

Other2017 IEEE Asia Pacific Microwave Conference, APMC 2017
CountryMalaysia
CityKuala Lumpur
Period17/11/1317/11/16

Keywords

  • 1-bit
  • Digital to analog converter
  • delta-sigma
  • direct digital to RF
  • image
  • microwaves
  • transmitters

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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  • Cite this

    Kazuno, M., Motoyoshi, M., Kameda, S., & Suematsu, N. (2017). A study on the SNR in higher Nyquist zone of 1-bit low-pass delta-sigma RZ-DAC. In I. Pasya (Ed.), 2017 Asia Pacific Microwave Conference, APMC 2017 - Proceedings (pp. 918-921). (Asia-Pacific Microwave Conference Proceedings, APMC). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/APMC.2017.8251599