Frequency conversion

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A 60-GHz Low-Noise mmWave Divider-Less Fractional-N Cascaded PLL Achieving −250.2-dB FoMJ in 28-nm CMOS

A 60-GHz Low-Noise mmWave Divider-Less Fractional-N Cascaded PLL Achieving −250.2-dB FoMJ in 28-nm CMOS 150 150
Author(s): Jaehong Jung, Eunseok Lee, Donghyeon Han, Jinchen Wang, Anantha P. Chandrakasan, Ruonan Han

Abstract:

This article presents a fractional- ${ {N}}$ cascaded phase-locked loop (PLL) operating in the mmWave band from 55.8 to 64.2 GHz. The cascaded architecture consists of a first-stage fractional- ${ {N}}$ reference-sampling (RS) PLL and a second-stage sub-sampling (SS) PLL, incorporating two key innovations. The first-stage RS-PLL leverages a fully differential voltage-domain quantization-noise cancellation (…

Published in: IEEE Journal of Solid-State Circuits
Page(s): 1 – 13
Year of Publication: 2026
Electronic ISSN: 1558-173X
DOI: 10.1109/JSSC.2026.3652928
Publisher: IEEE

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A Sub-Threshold Oscillator-Based High-Accuracy Temperature Sensor With Tolerance to Supply Fluctuation and Device Aging

A Sub-Threshold Oscillator-Based High-Accuracy Temperature Sensor With Tolerance to Supply Fluctuation and Device Aging 150 150
Author(s): Wei Wang, Yumin Su, Shayok Dutta, Liwen Jiang, Zhiyu Chen, Zhanghao Yu, Caleb Kemere, Kaiyuan Yang

Abstract:

Accurate, low-power, and compact temperature sensors are demanded in a wide range of biomedical, environmental, and industrial sensing applications. This article presents an accurate and precise CMOS temperature sensor based on a sub-threshold ring oscillator (RO) in 180 nm. The sensing core employs a five-stage super cut-off contention-free (SCCF) delay cell …

Published in: IEEE Journal of Solid-State Circuits
Page(s): 1 – 11
Year of Publication: 2026
Electronic ISSN: 1558-173X
DOI: 10.1109/JSSC.2025.3644747
Publisher: IEEE

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