Low-Power and Low-Phase-Noise Gm-Enhanced Current-Reuse Differential Colpitts VCO

Kuang Wei Cheng; Sheng Kai Chang; Yu Chieh Huang

doi:10.1109/TCSII.2019.2908423

Low-Power and Low-Phase-Noise G_m-Enhanced Current-Reuse Differential Colpitts VCO

Kuang Wei Cheng, Sheng Kai Chang, Yu Chieh Huang

Institute of Computer and Communication Engineering

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

A Colpitts voltage-controlled oscillator (VCO) is presented for low-power and low-phase-noise applications. The current efficiency of the proposed VCO is improved through g_m-enhanced and current-reuse techniques. In addition, a clover-shaped inductor is employed to mitigate electromagnetic interference (EMI) effects. The VCO is implemented in a 0.18-μm CMOS process and is shown to operate at frequencies of 2.34 to 2.55 GHz with a tuning range of 8.6%. The prototype has a power dissipation of 1.4 mW and achieves a phase noise of-122.85 dBc/Hz at a 1 MHz frequency offset.

Original language	English
Article number	8678442
Pages (from-to)	733-737
Number of pages	5
Journal	IEEE Transactions on Circuits and Systems II: Express Briefs
Volume	66
Issue number	5
DOIs	https://doi.org/10.1109/TCSII.2019.2908423
Publication status	Published - 2019 May

All Science Journal Classification (ASJC) codes

Electrical and Electronic Engineering

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title = "Low-Power and Low-Phase-Noise Gm-Enhanced Current-Reuse Differential Colpitts VCO",

abstract = "A Colpitts voltage-controlled oscillator (VCO) is presented for low-power and low-phase-noise applications. The current efficiency of the proposed VCO is improved through gm-enhanced and current-reuse techniques. In addition, a clover-shaped inductor is employed to mitigate electromagnetic interference (EMI) effects. The VCO is implemented in a 0.18-μm CMOS process and is shown to operate at frequencies of 2.34 to 2.55 GHz with a tuning range of 8.6%. The prototype has a power dissipation of 1.4 mW and achieves a phase noise of-122.85 dBc/Hz at a 1 MHz frequency offset.",

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