A 28-nm 368-fJ/Cycle, 0.43%/V Supply-Sensitivity, FLL-Based RC Oscillator Featuring Positive-TC-Only Resistors and ΔΣM-Based Trimming

被引：5

作者：

Huang, Yunbo ^{[1
]}

Chen, Yong ^{[1
]}

Yang, Kaiyuan ^{[2
]}

Crovetti, Paolo ^{[3
]}

Mak, Pui-In ^{[1
]}

Martins, Rui P. ^{[1
]}

机构：

[1] Univ Macau, State Key Lab Analog & Mixed Signal VLSI & IME ECE, Macau, Peoples R China

[2] Rice Univ, Dept Elect & Comp Engn, Houston, TX 77005 USA

[3] Politecn Torino, Dept Elect & Telecommun, I-10129 Turin, Italy

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS | 2023年 / 70卷 / 11期

关键词：

Frequency-locked-loop (FLL); RC oscillator; CMOS; temperature coefficients; switched-capacitor resistor; delta-sigma-modulator; frequency inaccuracy; energy efficiency; RELAXATION-OSCILLATOR;

D O I：

10.1109/TCSII.2023.3277617

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

brief presents a process-scaling-friendly frequency-locked-loop (FLL)-based RC oscillator. It features an R-R-C frequency-to-voltage converter that entails resistors with only the same-sign temperature coefficients. Together with a low-leakage switched-capacitor resistor and a delta-sigma modulator-based trimming, our 71.8-MHz RC oscillator in 28nm CMOS achieves a frequency inaccuracy of 77.6 ppm/C-degrees, a 0.43%/V supply sensitivity, and an 11-ps(rms) period jitter. The energy efficiency is 368 fJ/cycle.

引用

页码：3950 / 3954

页数：5

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