Low phase noise ring VCO employing input‐coupled dynamic current source
Low phase noise ring VCO employing input‐coupled dynamic current source
复制标题
采用输入耦合动态电流源的低相位噪声环形 VCO
DOI：
10.1049/el.2019.3277
复制
发表时间：
2020
影响因子：
1.1
通讯作者：
D. Im
中科院分区：
文献类型：
--
作者：
In;D. Im
提出了一种采用输入耦合动态电流源的低相位噪声环压控振荡器（VCO）。通过简单地将输入信号耦合到电流源晶体管的栅极节点，所提出的反相器比传统结构具有更大的输出摆幅和更陡的最大斜率，这直接导致相位噪声的改善。在相同条件下，与传统结构相比，所提出的环形VCO在100 kHz和1 MHz偏移频率下分别实现了7.5和11 dB的相位噪声改善。所提出的环形 VCO 的调谐范围为 823–1300 MHz，布局后仿真显示整个振荡频率范围内的品质因数为 159–162 dBc/Hz。在测量结果中，作者记录了 -106 dBc/Hz 的相位噪声，在 1 MHz 偏移频率下品质因数达到 165 dBc/Hz，在 1 GHz 振荡频率下从 1.8 V 电源消耗 1.2 mW。所提出的环形 VCO 采用 180 nm CMOS 工艺实现，尺寸为 0.0024 mm2。
A low-phase noise ring voltage-controlled oscillator (VCO) employing input-coupled dynamic current source is presented. By simply coupling the input signal to the gate node of the current source transistor, the proposed inverter has a larger output swing and steeper maximum slope than conventional structures, which directly results in phase noise improvement. Under the same conditions, compared to the conventional structure, the proposed ring VCO achieves 7.5 and 11 dB of phase noise improvement at 100 kHz and 1 MHz offset frequencies, respectively. The proposed ring VCO has a tuning range of 823–1300 MHz and post-layout simulation shows a figure-of-merit of 159–162 dBc/Hz in the entire oscillation frequency range. In the measurement results,the authors recorded a phase noise of −106 dBc/Hz and figure-of-merit reaching 165 dBc/Hz at 1 MHz offset frequency, consuming 1.2 mW from a 1.8 V supply at 1 GHz oscillation frequency. The proposed ring VCO is implemented in 180 nm CMOS process and occupies a size of 0.0024 mm2.