2.45-GHz-CMOS temperature compensated multi-controlled oscillator for IEEE 802.15 wireless PAN

摘要

A 2.45 GHz Multi-Controlled Oscillator (MCO) has been designed using a CMOS 0.28 μm STMicroelectronics technology for use in frequency synthesizer and open loop FSK modulation circuit in multi-band IEEE 802.15 Wireless Personal Area Network (PAN) applications. Simple structure allowing multiple frequency control has been adopted so that the VCO maintains its center frequency and tuning range throughout -40℃ to 120℃ by the way of a Proportional To Absolute Temperature (PTAT) biasing scheme. Simulations and measurements show the sensitivity of the VCO center frequency has been reduced from 1300 ppm/℃ to 73 ppm/℃, while a phase noise of -96 dBc/Hz @ 1 MHz offset with a power consumption of 18 mW have been achieved.