A Voltage-Controlled Ring Oscillator With VCO-Gain Variation Compensation
A Voltage-Controlled Ring Oscillator With VCO-Gain Variation Compensation
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具有VCO增益变化补偿的压控环形振荡器
DOI：
10.1109/lmwc.2020.2967391
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发表时间：
2020
影响因子：
3
通讯作者：
Li Geng
中科院分区：
文献类型：
--
作者：
Xiaoyan Gui;Renjie Tang;Yanlong Zhang;Dan Li;Li Geng
提出了一种具有VCO增益变化补偿的压控振荡器（VCO），通过引入一个具有容性负反馈的交叉耦合对来减小电流模式逻辑（CML）环形振荡器中<inline-formula><tex-math notation="LaTeX">的</tex-math></inline-formula><inline-formula><tex-math notation="LaTeX">VCO增益</tex-math></inline-formula>变化，从而减小VCO增益的非线性。<inline-formula><tex-math notation="LaTeX"></tex-math></inline-formula>该压控振荡器采用标准的0.18-<inline-formula><tex-math notation="LaTeX">$\mu \text{m}$</tex-math></inline-formula>CMOS工艺设计和制造，在1.8V电源电压下，其工作频率为1.78 ~ 2.53 GHz，增益变化小于14.01%，内核面积<inline-formula><tex-math notation="LaTeX">为0.185\times0.081 $</tex-math></inline-formula>mm<sup>2</sup>，功耗为20 mA（包括偏置电路）.相位噪声的测量值分别为−92.68 dBc/Hz（偏移高频带载波频率1 MHz时）和−114.97 dBc/Hz（偏移高频带载波频率10 MHz时）。
A voltage-controlled oscillator (VCO) with VCO-gain (<inline-formula> <tex-math notation="LaTeX">$K_{\mathrm {VCO}}$ </tex-math></inline-formula>) variation compensation is proposed to reduce <inline-formula> <tex-math notation="LaTeX">$K_{\mathrm {VCO}}$ </tex-math></inline-formula> variation in a current-mode logic (CML) ring oscillator by introducing a cross-coupled pair with capacitive degeneration that mitigates the nonlinearity of <inline-formula> <tex-math notation="LaTeX">$K_{\mathrm {VCO}}$ </tex-math></inline-formula>. Designed and fabricated in a standard 0.18-<inline-formula> <tex-math notation="LaTeX">$\mu \text{m}$ </tex-math></inline-formula> CMOS process, the proposed VCO can be tuned from 1.78 to 2.53 GHz, with the VCO gain variation less than 14.01%, while occupying a core area of <inline-formula> <tex-math notation="LaTeX">$0.185\times0.081$ </tex-math></inline-formula> mm<sup>2</sup> and consuming 20 mA including the bias circuitry, from a 1.8-V supply voltage. The phase noise is measured to be −92.68 dBc/Hz at 1 MHz offset and −114.97 dBc/Hz at 10 MHz offset from the high-band carrier frequency, respectively.