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A complementary Colpitts VCO implemented with ring inductor

Sheng‐Lyang Jang, Chun‐Yuan Chiu, Chien‐Feng Lee

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Abstract

This paper presents a novel differential voltage controlled oscillator (VCO). The VCO uses a closed-loop ring inductor and is composed of two single-ended complementary Colpitts LC VCOs coupled by two identical inductors and is implemented in a standard 0.18μm CMOS technology. This differential VCO operates at 5.76–6.76 GHz. The measured phase noise of the VCO operating at 6.7 GHz is −118.5 dBc/Hz at 1-MHz offset while the VCO draws 3.75 mA and 5.625 mW consumption from a supply voltage of 1.5 V.

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What this paper is about

This paper presents a novel differential voltage controlled oscillator (VCO). The VCO uses a closed-loop ring inductor and is composed of two single-ended complementary Colpitts LC VCOs coupled by two identical inductors and is implemented in a standard 0.18μm CMOS technology. This differential VCO operates at 5.76–6.76 GHz. The measured phase noise of the VCO operating at 6.7 GHz is −118.5 dBc/Hz at 1-MHz offset while the VCO draws 3.75 mA and 5.625 mW consumption from a supply voltage of 1.5 V.

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OpenAlex reports 5 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

This paper presents a novel differential voltage controlled oscillator (VCO). The VCO uses a closed-loop ring inductor and is composed of two single-ended complementary Colpitts LC VCOs coupled by two identical inductors and is implemented in a standard 0.18μm CMOS technology. This differential VCO operates at 5.76–6.76 GHz. The measured phase noise of the VCO operating at 6.7 GHz is −118.5 dBc/Hz at 1-MHz offset while the VCO draws 3.75 mA and 5.625 mW consumption from a supply voltage of 1.5 V.

Key concepts: Voltage-controlled oscillator, Colpitts oscillator, Inductor, Phase noise, dBc, CMOS, Electrical engineering, Voltage

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