A 2.5GHz low phase noise LC VCO for WLAN applications in 0.18-µm CMOS technology

A 2.5GHz LC voltage controlled oscillator with low phase noise design and optimization is presented. The LC VCO is implemented in 0.18-µm CMOS technology and used for wireless local area network. The proposed VCO achieves phase noise of −128.7dBc/Hz at 1MHz offset, −105.4dBc/Hz at100KHz offset, 11% tuning range while consuming 3mA in 0.18V supply.

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