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Analysis and Design of a Dual-Mode VCO With Inherent Mode Compensation Enabling
提出一种双模式VCO，通过对称8字变压器和电容阵列补偿模式不平衡，实现宽带低抖动频率合成。
7.9–14.3 GHz, 14.1–17.2 mW, 0.18 mm², -115 dBc/Hz, <85 fs rms jitter
双模式VCO模式补偿宽带频率合成低抖动SLSQP优化
▸对称8字变压器补偿模式不平衡
▸紧凑模式切换电路消除模式模糊
▸基于SLSQP的电容阵列自动优化算法
Abstract
This article presents a wideband, low-jitter fre-
quency synthesizer utilizing a dual-mode voltage-controlled oscil-
lator (VCO). Mode imbalance in the dual-mode VCO is analyzed
theoretically and compensated through the proposed symmet-
ric figure-8 transformer and capacitor arrays. The compact
mode-switching circuitry fundamentally eliminates mode ambi-
guity in multi-mode autonomous circuits. A computer-aided algo-
rithm based on sequential least-squares programming (SLSQP)
and hierarchical op