【摘要】：提出了一種基于參考信號注入的TIADC時(shí)間失配后臺(tái)校準(zhǔn)算法。該校準(zhǔn)算法統(tǒng)計(jì)通道間的參考信號過零點(diǎn)個(gè)數(shù),比較相鄰2個(gè)峰值的大小,計(jì)算得出誤差系數(shù),并將該誤差系數(shù)反饋回時(shí)鐘采樣控制單元進(jìn)行校正。采用Simulink軟件建立12位5通道TIADC模型,仿真結(jié)果表明,當(dāng)f_(in)/f_s≈0.040 3時(shí),有效位數(shù)從8.1位提升到11.8位,驗(yàn)證了算法的可行性。算法中的時(shí)間失配誤差提取與TIADC分開,并行處理,保證了輸入信號在整個(gè)奈奎斯特頻率范圍內(nèi)不受影響。該校準(zhǔn)算法消耗資源少,易于硬件實(shí)現(xiàn)。
[Abstract]:A TIADC time mismatch background calibration algorithm based on reference signal injection is proposed. The calibration algorithm calculates the number of zero crossing points of reference signal between channels, compares the size of two adjacent peaks, calculates the error coefficient, and feedback the error coefficient back to the clock sampling control unit to correct the error coefficient. A 12-bit five-channel TIADC model is established by using Simulink software. The simulation results show that when f _ (in) / fs 鈮，

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