3.6 GHz highly monotonic digitally controlled oscillator for all-digital phase locked loop
3.6 GHz highly monotonic digitally controlled oscillator for all-digital phase locked loop
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DOI：
10.1109/mwsym.2011.5972617
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发表时间：
2011-06
期刊：
影响因子：
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通讯作者：
R. Pokharel;A. Tomar;H. Kanaya;K. Yoshida
中科院分区：
文献类型：
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作者：
R. Pokharel;A. Tomar;H. Kanaya;K. Yoshida
提出了一种在数字控制振荡器（DCO）的调谐范围和微分非线性（DNL）之间进行权衡的解析方法。为了验证该方法，设计了一个12位DCO，采用0.18µm CMOS技术实现，并进行了测试。在不降低其他参数的情况下，测量到的DNL在最坏情况下为- 0.41最低有效位（LSB），这反过来导致在3.12 GHz至4.15 GHz调谐范围内的高度单调行为。在3.6 GHz的振荡频率下，测量到的相位噪声为- 135.2 dBc/Hz （@ 4 MHz偏移），功耗为19.2 mW，因此性能值（FOM）为- 181.5 dBc/Hz。
An analytical method to make a trade-off between the tuning range and differential non-linearity (DNL) for a digitally controlled oscillator (DCO) is proposed. To verify the approach, a 12-bit DCO is designed, implemented in 0.18 µm CMOS technology, and tested. The measured DNL was −0.41 Least Significant Bit (LSB) in the worst case without degrading the other parameters which, in turn, results in highly monotonic behavior over the tuning range from 3.12 GHz to 4.15 GHz. The measured phase noise was −135.2 dBc/Hz (@ 4 MHz offset) at oscillation frequency of 3.6 GHz with 19.2 mW power consumption which results in figure of merit (FOM) to be −181.5 dBc/Hz.