Flicker noise corner

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A 550 μW Capacitor-Assisted Transformer-Based VCO Achieving 204 dBc/Hz FoMA at 1MHz Frequency Offset

A 550 μW Capacitor-Assisted Transformer-Based VCO Achieving 204 dBc/Hz FoMA at 1MHz Frequency Offset 150 150
Author(s): Teng-Shen Yang, Liang-Hung Lu

Abstract:

This letter presents a capacitor-assisted transformer-based voltage-controlled oscillator (VCO) that achieves a low flicker-noise corner with sub-milliwatt power consumption and compact chip area. By introducing a small assisting capacitor into the transformer, the higher-order tank impedance is reshaped from the second-resonance region toward the third-resonance region, resulting in a more …

Published in: IEEE Solid-State Circuits Letters
Page(s): 1 – 1
Year of Publication: 2026
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2026.3690818
Publisher: IEEE

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A Self-Injection LC Oscillator for Flicker Noise Reduction

A Self-Injection LC Oscillator for Flicker Noise Reduction 150 150
Author(s): Bahram Jafari, Ali Ghafari, Sankaran Aniruddhan, Shahriar Mirabbasi, Sudip Shekhar

Abstract:

Self-injection has been used in lasers and photonic integrated circuits to reduce the laser’s phase noise (PN). We show that self-injection can be leveraged in GHz LC oscillators as well. Our oscillator employs a current-domain self-injection technique by leveraging second-harmonic extraction, capacitive phase shifting, and self-mixing through the oscillator’…

Published in: IEEE Journal of Solid-State Circuits
Page(s): 1 – 14
Year of Publication: 2025
Electronic ISSN: 1558-173X
DOI: 10.1109/JSSC.2025.3643322
Publisher: IEEE

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