ESD-Protected K-Band Low-Noise Amplifiers Using RF Junction Varactors in 65-nm CMOS

Ming-Hsien Tsai, Shawn S. H. Hsu, Fu-Lung Hsueh, Chewn-Pu Jou
2011 IEEE transactions on microwave theory and techniques  
This paper presents two K-band low-noise amplifiers (LNAs) in 65-nm CMOS using the proposed RF junction varactors as the ESD protection devices. The junction varactors are customized for the RF ESD applications with accurate equivalent circuit models. The experimental results demonstrate excellent second breakdown currents ( 2 ) and high ratios of the ESD level to parasitic capacitances ( ESD ESD ). Using the dual-diode topology, the first LNA demonstrates an over 2-kV Human-Body-Model (HBM)
more » ... protection level with a noise figure (NF) of 2.8 dB and a peak gain of 14.3 dB at around 24 GHz under a power consumption of only 7 mW. By incorporating an RF junction varactor as the extra gate-source capacitance at the input stage as a part of the ESD network, the second LNA presents an enhanced failure current level up to 2.6 A (corresponding to an HBM ESD level of 3.9 kV), and a Charge-Device-Model (CDM) ESD level up to 10.7 A, characterized by the Very Fast Transmission Line Pulse (VFTLP) tests. The second LNA shows a NF of 3.2 dB and a power gain of 13.7 dB, also under 7 mW. Index Terms-Charge-device-model (CDM), electrostatic discharge (ESD), junction varactor, low-noise amplifier (LNA), MOS, radio frequency (RF), transmission line pulse (TLP), very fast transmission line pulse (VFTLP).
doi:10.1109/tmtt.2011.2170582 fatcat:hctgza6pdfgkfdfaehp5iepgbe