基于p衬底n阱分布式栅格电感的5.5GHz LC振荡器设计

S. A. E. A. Rahim, A. Barakat, R. Pokharel
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引用次数: 0

摘要

本文设计了一种采用增强型电感的低噪声LC振荡器,在电感的p基板上设计了n阱分布网格,提高了电感的品质因数,从而改善了振荡器的相位噪声。电磁仿真结果表明,减小了电感的总等效电阻,提高了电感的质量因数。利用这种新型电感设计了一个5.5GHz交叉耦合CMOS LC振荡器。仿真结果表明,在与载波偏移1MHz时,振荡器的相位噪声提高了0.7 dBc/Hz, FOM为189。
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Design of 5.5GHz LC oscillator using distributed grid of N-well in P-substrate inductor
This paper presents the design of low noise LC oscillator that employs an enhanced inductor, where a distributed grid of N-well in P-substrate of the inductor was design to improve the quality factor of the inductor, therefore improves the phase noise of the oscillator. The electromagnetic (EM) simulation shows that the total equivalent resistance of an inductor is reduced, which results in a higher quality factor. A 5.5GHz cross-coupled CMOS LC oscillator is designed by using this new inductor. Based on the simulation results, the oscillator shows an improvement of 0.7 dBc/Hz in phase noise at 1MHz offset from the carrier, which results a FOM of 189.
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