A Dual-Conduction Class-C VCO for a Low Supply Voltage

作者：Okada Kenichi^*; Nomiyama You; Murakami Rui; Matsuzawa Akira

来源：IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences, 2012, E95A(2): 506-514.

DOI：10.1587/transfun.E95.A.506

• VCO
• class-C
• dual conduction
• CMOS
• low supply voltage
• impulse sensitivity ISF)

This paper proposes a dual-conduction class-C VCO for ultra-low supply voltages. Two cross-coupled NMOS pairs with different bias points are employed. These NMOS pairs realize an impulse-like current waveform to improve the phase noise in the low supply conditions. The proposed VCO was implemented in a standard 0.18 mu m CMOS technology, which oscillates at a carrier frequency of 4.5 GHz with a 0.2-V supply voltage. The measured phase noise is 104 dBc/Hz@ 1 MHz-offset with a power consumption of 114 mu W, and the FoM is -187 dBc/Hz.

• 出版日期2012-2