Scholarlink

This paper presents a novel approach to ultra-low latency implementation of Sigma Delta (SD) Digital-to-Analog Converters (DACs) on Field Programmable Gate Arrays (FPGAs). We detail the design, simulations, and VHDL implementation of the proposed SD DACs. The paper provides an approach for a design-space exploration to find a tradeoff between the internal word lengths of calculations in the DAC and the Signal to Noise Ratio (SNR) of the output audio signal. In simulations, the proposed DAC can achieve an SNR of approximately 170 dB for input sample rates of 48 kHz - 768 kHz with the IP running at 49.152 MHz, resulting in an Oversampling Ratio (OSR) of 1024 - 64. In measurements, the DAC provides a latency inferior to 1 \(\upmu \) s. Our SD DAC implementation has been integrated as an IP core to the SyFaLa toolchain, which aims to facilitate the prototyping of real-time audio Digital Signal Processing (DSP) applications on FPGA.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Sigma Delta DACs for Low Latency High Sampling Rate Audio on an FPGA

  • 会议论文

  • 发表日期：

    2026年

查看全文
  • Jonas Höpner,
  • Romain Michon,
  • Anastasia Volkova

摘要

This paper presents a novel approach to ultra-low latency implementation of Sigma Delta (SD) Digital-to-Analog Converters (DACs) on Field Programmable Gate Arrays (FPGAs). We detail the design, simulations, and VHDL implementation of the proposed SD DACs. The paper provides an approach for a design-space exploration to find a tradeoff between the internal word lengths of calculations in the DAC and the Signal to Noise Ratio (SNR) of the output audio signal. In simulations, the proposed DAC can achieve an SNR of approximately 170 dB for input sample rates of 48 kHz - 768 kHz with the IP running at 49.152 MHz, resulting in an Oversampling Ratio (OSR) of 1024 - 64. In measurements, the DAC provides a latency inferior to 1 \(\upmu \) s. Our SD DAC implementation has been integrated as an IP core to the SyFaLa toolchain, which aims to facilitate the prototyping of real-time audio Digital Signal Processing (DSP) applications on FPGA.