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A Supply Pushing Reduction Technique for LC Oscillators Based on Ripple Replicat
提出一种基于纹波复制的LC振荡器电源推挤抑制技术，降低电源波动对振荡器性能的影响。
4.9–5.6 GHz, 0.8–1.3 mW, <1 MHz/V supply pushing, <−49 dBc spur (50 mVpp ripple)
LC振荡器电源推挤抑制纹波复制校准环路低噪声
▸采用纹波复制块（RRB）在尾电流源栅极生成放大纹波副本以稳定尾电流和振荡幅度
▸集成校准环路自动设置最佳复制增益以最小化振荡幅度变化
▸有效应对多种电源纹波（正弦波、锯齿波、多音及调制纹波）
Abstract
In this paper, we propose a method to suppress
supply pushing of an LC oscillator such that it may directly
operate from a switched-mode dc–dc converter generating fairly
large ripples. A ripple replication block (RRB) generates an
amplified ripple replica at the gate terminal of the tail current
source to stabilize the oscillator’s tail current and thus its
oscillating amplitude. The parasitic capacitance of the active
devices and correspondingly the oscillation frequency are sta-
bilized in tur