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2014•Unpublished venueRequires access

A 2.34–3.29GHz CMOS LC VCO with low phase noise and low power

Hao Wang, Xiaole Cui, Chung Len Lee, Zuolin Cheng

Open publisher page 2 citations

Abstract

A low phase noise wideband LC VCO is designed and presented. In this VCO, a symmetrical LC tank with proper arrangement of varactors is used to extend its tuning range. Results from the post layout simulation show that the VCO achieved a wide tuning range from 2.34GHz to 3.29GHz. Moreover, a noise cancellation technique is adopted to achieve better phase noise performance. The VCO exhibits that phase noise is lower than -120.1dBc/Hz at 1-MHz offset frequency. The circuit consumes 2.38mA of power from a 1.8V supply.

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What this paper is about

A low phase noise wideband LC VCO is designed and presented. In this VCO, a symmetrical LC tank with proper arrangement of varactors is used to extend its tuning range. Results from the post layout simulation show that the VCO achieved a wide tuning range from 2.34GHz to 3.29GHz. Moreover, a noise cancellation technique is adopted to achieve better phase noise performance. The VCO exhibits that phase noise is lower than -120.1dBc/Hz at 1-MHz offset frequency. The circuit consumes 2.38mA of power from a 1.8V supply.

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Available abstract

A low phase noise wideband LC VCO is designed and presented. In this VCO, a symmetrical LC tank with proper arrangement of varactors is used to extend its tuning range. Results from the post layout simulation show that the VCO achieved a wide tuning range from 2.34GHz to 3.29GHz. Moreover, a noise cancellation technique is adopted to achieve better phase noise performance. The VCO exhibits that phase noise is lower than -120.1dBc/Hz at 1-MHz offset frequency. The circuit consumes 2.38mA of power from a 1.8V supply.

Key concepts: Voltage-controlled oscillator, Phase noise, Wideband, Offset (computer science), CMOS, Electrical engineering, LC circuit, Electronic engineering

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