An On-Chip Relaxation Oscillator in 5-nm FinFET Using a Frequency-Error Feedback Loop

Nandish Mehta; Stephen G. Tell; Walker J. TurnerLamar TatroJih-Ren GohC. Thomas Gray

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An On-Chip Relaxation Oscillator in 5-nm FinFET Using a Frequency-Error Feedback Loop

机译：An On-Chip Relaxation Oscillator in 5-nm FinFET Using a Frequency-Error Feedback Loop

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Availability of a reliable ON-chip oscillator can secure a system-on-chip (SoC) against physical clock attacks by enabling applications such as boot-up using ON-chip oscillator and hardware clock monitors. This article proposes a frequency-error feedback (FEF) loop-based relaxation oscillator for such applications. It suppresses the low-frequency noise and improves the time interval error (TIE) without degrading the period jitter. It also stabilizes the oscillator against supply and temperature variations. A 77-MHz oscillator prototype is fabricated in a commercial 5-nm FinFET process. Operating from 0.9-V digital and 1.2-V analog supplies, the prototype consumes a total of 0.84 mW and occupies an area of 0.0152 mm 2 . It achieves a TIE of 3 ns over 10 K cycles which is $3times $ better than an oscillator without an FEF loop. Chip samples are picked from four wafer split lots. The worst case frequency variation measured from 16 samples is $pm 0.25%$ across an analog supply change of 1.1–1.35 V, while a variation of $pm 0.3%$ is measured over ?40 to $125 ^circ text{C}$ temperature from eight samples.

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《IEEE Journal of Solid-State Circuits》 |2022年第10期|2898-2908|共11页
作者
Nandish Mehta; Stephen G. Tell; Walker J. TurnerLamar TatroJih-Ren GohC. Thomas Gray;
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作者单位

NVIDIA Corporation, Santa Clara, CA, USA|Nvidia Research, Santa Clara, CA, USA;

Research Department, NVIDIA, Durham, NC, USA;

NVIDIA Research—Circuits Research Group, NVIDIA Corporation, Durham, NC, USANVIDIA Corporation, Santa Clara, CA, USANVIDIA Corporation, Hsinchu, Taiwan;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类基本电子电路;
关键词
Oscillators; Clocks; System-on-chip; Temperature measurement; Logic gates; Crystals; Thermal stability;

An On-Chip Relaxation Oscillator in 5-nm FinFET Using a Frequency-Error Feedback Loop

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