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2011•Unpublished venueRequires access

A 220 MHz low phase noise Colpitts oscillator

Ning Lu, Mark Allan Haney

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Abstract

This paper presents the design of a VCO using Colpitts topology. The VCO is designed to work at 220 MHz as part of the Frequency Generating Unit (FGU). The circuit has been realized by discrete level circuits. The frequency range is between 217 MHz and 222 MHz. The low phase noise of -122 dBc/Hz at 20 kHz offset frequency was achieved by the varactor tuned Colpitts oscillator. Both simulation and measurements demonstrate the low noise performance.

About this research paper

What this paper is about

This paper presents the design of a VCO using Colpitts topology. The VCO is designed to work at 220 MHz as part of the Frequency Generating Unit (FGU). The circuit has been realized by discrete level circuits. The frequency range is between 217 MHz and 222 MHz. The low phase noise of -122 dBc/Hz at 20 kHz offset frequency was achieved by the varactor tuned Colpitts oscillator. Both simulation and measurements demonstrate the low noise performance.

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Available abstract

This paper presents the design of a VCO using Colpitts topology. The VCO is designed to work at 220 MHz as part of the Frequency Generating Unit (FGU). The circuit has been realized by discrete level circuits. The frequency range is between 217 MHz and 222 MHz. The low phase noise of -122 dBc/Hz at 20 kHz offset frequency was achieved by the varactor tuned Colpitts oscillator. Both simulation and measurements demonstrate the low noise performance.

Key concepts: Colpitts oscillator, Phase noise, Voltage-controlled oscillator, dBc, Varicap, Vackář oscillator, Electrical engineering, Electronic engineering

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