On the investigation of voltage controlled oscillator phase noise for IoT applications

Voltage controlled oscillator (VCO) is one of the key elements in radio frequency (RF) transceivers. A VCO working at 2.4 GHz and designed in CMOS technology is presented. It is suitable for low-cost and low-noise applications using wireless standards such as ZigBee, Bluetooth, Wi-Fi and WPAN (Wireless Personal Area Network). The noise characteristics of this RF VCO are investigated. Noise measurements, especially, phase noise are achieved under different environmental conditions