中圖分類號： TN935.4 文獻(xiàn)標(biāo)識碼： A DOI：10.16157/j.issn.0258-7998.212177 中文引用格式： 李海濤,，李斌康，孫彬,，等. 基于時間交替采樣技術(shù)的1 GS/s,、16 bit數(shù)據(jù)采集系統(tǒng)研究[J].電子技術(shù)應(yīng)用，2022,，48(7)：118-123,，139. 英文引用格式： Li Haitao，Li Binkang,，Sun Bin,，et al. Research on 1 GS/s，16 bit data acquisition system based on time-interleaved sampling technology[J]. Application of Electronic Technique,，2022,，48(7)：118-123，139.
Research on 1 GS/s,，16 bit data acquisition system based on time-interleaved sampling technology
Li Haitao1,，Li Binkang1，2,，Sun Bin1,，Zhang Mei1，2,，Tian Geng1,，2
1.Northwest Institute of Nuclear Technology，Xi′an 710024,，China,； 2.State Key Laboratory of Intense Pulsed Radiation Simulation and Effect，Xi′an 710024，China
Abstract： In order to obtain high precision amplitude information of large dynamic range signals to be sampled, a 1 GS/s, 16 bit high-speed and high-precision data acquisition system is designed based on the time-interleaved sampling technology. Through tests, it is found that if the input analog signal contains a large DC component, the output sampled data waveform will oscillate. It is confirmed that the bias error is the cause of oscillation. By setting the ADC to work in the real-time error correction mode, combined with the off-line correction algorithm, the oscillation problem of sampled data is solved, and the time-domain waveform and spectrum before and after correction are compared to verify the effectiveness of the correction algorithms. The test results show that the designed data acquisition system realizes the function of single channel high-precision measurement of large dynamic range signals.
Key words : data acquisition system,；time-interleaved sampling,；mismatch error；offset error,；correction algorithm
0 引言
隨著半導(dǎo)體技術(shù)的快速進(jìn)步,，基于模數(shù)轉(zhuǎn)換器(Analog to Digital Converter，ADC)的實(shí)時數(shù)據(jù)采樣技術(shù)發(fā)展迅速,。為了高精度地獲取待采樣信號波形,，需要選擇合適參數(shù)的數(shù)據(jù)采集系統(tǒng)。待采樣信號帶寬越高,，需要的數(shù)據(jù)采集系統(tǒng)實(shí)時采樣率就越高,；待采樣信號的幅值動態(tài)范圍越大，需要的數(shù)據(jù)采集系統(tǒng)分辨率越高,。
