在1998年，Ali Hajimiri和Thomas H. Lee对电子振荡器建立了一种新的相噪分析模型，这种模型考虑了噪声注入的时变本质，即 ISF （Impulse Sensitivity Function， 脉冲敏感函数）理论。 这种理论把振荡器建模为具有n个噪声源输入和2个输出端口，现在考虑时域上的瞬时噪声脉冲对输出波形幅度和相位的影响。 若有一段电流脉冲注入一个理想的LC谐振腔，那么对输出电压的影响如下图： 若在振荡波峰处注入噪声电流，此时谐振腔能量全部以电容器里面的电场能储存，电流会被 …

VCO is an Oscillator of which frequency can be Controlled by external Voltage stimulus. One of major applications for VCO is a frequency synthesizer. Frequency synthesizer provides sinusoidal/pulse signals at predetermined frequencies that is …

The odd harmonics (3rd order in particular) of the VCO are not of much concern because such harmonics are not detrimental to multiplication action of the mixer. In fact, presence of odd harmonics often helps to shape the output wave to have sharper transitions when crossing zero, which is desirable in wireline systems.

抱着探讨AI对IC设计冲击到底有多深的态度， 本文希望记录一下一个模拟小白站在AI的肩膀上到底能走多远。 为什么选vco? 主要还是简单， 不是说设计简单，是功能简单，输入简单，输出简单容易被非模拟背景的人理解。

• Create a test bench with your VCO (VCO 1) for injection and a replica VCO (VCO 2) which will be used for phase comparison • Separate VDD, VSS and VCONTROL for the two VCOs

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2023年9月18日 · Abstract: This paper presents the theory and implementation of a balanced dual-core inverse-class-F (class-F $^{\mathrm{ -1}}$ ) voltage-controlled oscillator (VCO). The class-F $^{\mathrm{ -1}}$ topology supports high-quality-factor (high- $Q$ ) differential switched-capacitors (SCs) for both fundamental and 2 $^{\mathrm{ nd}}$ -harmonic ...

We propose S-VCO (Symmetrical Visual Contrastive Optimization), a novel VLM finetuning paradigm that enforces explicit supervision over visual details and their alignment to texts, thus enhancing visually dependent task capabilities while preserving or …

This paper presents the theory and implementation of a balanced dual-core inverse-class-F (class-F −1^{\mathrm{ -1}} ) voltage-controlled oscillator (VCO). The class-F −1^{\mathrm{ -1}} topology supports high-quality-factor (high- QQ ) differential switched-capacitors (SCs) for both fundamental and 2 nd^{\mathrm{ nd}} -harmonic frequency ...

2024年11月25日 · 传统的做法是将所有的噪声源合并成一个有效的噪声源，并且用电阻噪声的F倍来表示（F是一个经验参数）。