AEROSPACE SHANGHAI, Volume. 42, Issue 3, 175(2025)

Implementation and Application of Time-domain ADC based on FPGA in Laser Ranging System

Yongliang ZHOU*, Zhen MAO, and Jun TANG
Author Affiliations
  • No.58 Research Institute,China Electronics Technology Group Corporation,Wuxi214035,,China
  • show less

    In response to the design challenges engendered by the necessity to balance power consumption,volume,and cost in the system design of photoelectric sensors such as lidar and laser ranging,a time-to-digital conversion (TDC) circuit is constructed through the employment of a low-cost Xilinx Spartan 6 FPGA,and a time-domain single-slope-type analog-to-digital converter (ADC) with a sampling rate of 1.25×108/s and an 8-bit resolution is attained.The actual measurement demonstrates that this time-domain ADC exhibits good linearity after calibration:differential nonlinearity (DNL) [-0.49,0.62] LSB,integral nonlinearity Least Significant Bit (INL)[-0.98,0.74] LSB.The highest effective bit reaches 6.2 bits,and the measurement range is [0.47,2.7] V.It is ascertained that only 13% of the FPGA SLICE is occupied.This time-domain ADC exploits the high-precision clock source CDCM61004 (125 MHz,RMS Jitter<1 ps) as the system clock.The actual measurement manifests that when sampling a high-frequency signal of 50 MHz,the effective bit could reach 5.8 bits.When tested and applied in the laser ranging sensor,the time-domain ADC is capable of collecting the echo signals of the laser pulses and simultaneously obtaining the amplitude and time information of the echo signals,achieving a flexible and compact system design.

    Keywords
    Tools

    Get Citation

    Copy Citation Text

    Yongliang ZHOU, Zhen MAO, Jun TANG. Implementation and Application of Time-domain ADC based on FPGA in Laser Ranging System[J]. AEROSPACE SHANGHAI, 2025, 42(3): 175

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category: Communications and Networks

    Received: Jun. 5, 2024

    Accepted: --

    Published Online: Sep. 29, 2025

    The Author Email:

    DOI:10.19328/j.cnki.2096-8655.2025.03.020

    Topics