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首页> 外文期刊>Instrumentation and Measurement, IEEE Transactions on >The Soft-Injection-Locked Ring Oscillator and Its Application in a Vernier-Based TDC
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The Soft-Injection-Locked Ring Oscillator and Its Application in a Vernier-Based TDC

机译:软注入锁定环形振荡器及其在基于游标的TDC中的应用

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A time-to-digital converter (TDC) plays an important role in time interval measurement. Among various TDC structures, the Vernier-based TDC (VTDC) is promising because the time resolution of it depends on the frequency difference between the oscillators, not on the absolute oscillating frequency values. However, the oscillators used in the conventional VTDC require complicated calibration procedures. This makes the TDC system complex. This paper employs a new soft-injection-locked ring oscillator as the clock source for the VTDC. The proposed oscillator can oscillate immediately and accurately right after the triggering signal arrives. The TDC structure employing the purposed oscillators is verified by the TSMC 0.18- $mu{rm m}$ CMOS process. The measured differential nonlinearity is within ${pm}{rm 0.4}~{rm LSB}$ and the measured integral nonlinearity is within ${pm}{rm 0.8}~{rm LSB}$ . The power consumption is 27.8 mW. The chip's core area is around 0.095 ${rm mm}^{2}$ . When the supply voltage varies from 1.75 to 1.85 V, the resolution deviation is less than ${pm}{rm 0.18}~{rm LSB}$ .
机译:时间数字转换器(TDC)在时间间隔测量中起着重要作用。在各种TDC结构中,基于Vernier的TDC(VTDC)很有前途,因为它的时间分辨率取决于振荡器之间的频率差,而不是绝对振荡频率值。但是,常规VTDC中使用的振荡器需要复杂的校准程序。这使TDC系统变得复杂。本文采用了一种新型的软注入锁定环形振荡器作为VTDC的时钟源。提出的振荡器可以在触发信号到达后立即准确地振荡。采用专用振荡器的TDC结构已通过TSMC0.18-μmCMOS工艺进行了验证。所测量的差分非线性在$ {pm} {rm 0.4}〜{rm LSB} $之内,而所测量的积分非线性在$ {pm} {rm 0.8}〜{rm LSB} $之内。功耗为27.8 mW。芯片的核心面积约为0.095 $ {rm mm} ^ {2} $。当电源电压在1.75至1.85 V之间变化时,分辨率偏差小于$ {pm} {rm 0.18}〜{rm LSB} $。

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