A 1-mW K-band gate AC-coupled VCO with 0.25 V supply voltage

Authors:
C. L. Jin;X. P. Yu;C. Feng;W. M. Lim;Z. H. Lu;K. S. Yeo
Affiliations:
Zhejiang University, Hangzhou, People's Republic of China 310027;Zhejiang University, Hangzhou, People's Republic of China 310027;Zhejiang University, Hangzhou, People's Republic of China 310027;School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, Singapore 639798;School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, Singapore 639798;School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, Singapore 639798
Venue:
Analog Integrated Circuits and Signal Processing
Year:
2013

Citing 2
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Abstract

A K-band low-voltage voltage controlled oscillator (VCO) implemented in standard 65-nm bulk CMOS process is proposed. By using the proposed gate AC-coupling technique and biasing the cross-coupled transistors in moderate inversion region, the oscillator core operates under ultra low supply voltage with acceptable current efficiency. Reverse short-channel effect is also employed to reduce the threshold voltage of the cross-coupled transistors. Operating from 23.1 to 24.8 GHz, the fabricated VCO is able to work under supply voltage as low as 0.25 V with a core power consumption of 1 mW.