发明授权
US08044724B2 Low jitter large frequency tuning LC PLL for multi-speed clocking applications 有权
低抖动大频率调谐LC PLL,用于多速时钟应用

Low jitter large frequency tuning LC PLL for multi-speed clocking applications
摘要:
The subject innovation relates to systems and/or methodologies for generating a low jitter large frequency tuning LC-based phase-locked loop circuit for multi-speed clocking applications. In addition to a plurality of noise reduction features, the phase-locked loop includes programmable charge pump and loop filter that enable a wide loop bandwidth, a programmable VCO that enables a wide VCO frequency range and a per lane clock divider that further enables a wide PLL frequency range. Furthermore, an auto-calibration circuit ensures that the VCO included in the PLL receives the optimum current for noise reduction across the VCO frequency range.
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