Title :
A reliable ultra low power merged LNA and Mixer design for medical implant communication services
Author :
Jeong, Jihoon ; Kim, Jeongki ; Ha, Dong Sam ; Lee, Hyung-Soo
Author_Institution :
Dept. of Electr. & Comput. Eng., Virginia Tech, Blacksburg, VA, USA
Abstract :
This paper presents an ultra low power merged LNA and Mixer design for MICS (Medical Implant Communication Services) applications. A capacitor cross-coupled common gate LNA is implemented for an easy input matching and reasonable noise performance. The mixer operates in weak inversion, which significantly reduces power consumption and relaxes the voltage headroom without sacrificing the LNA performance. The relaxed voltage headroom enables the stacking of the LNA and the mixer with a low supply voltage of 1.2 V. The merged LNA and mixer consumes only 1.83 mW, and achieves 21.6 dB power gain. A NF of the circuit is 3.55 dB at 1 MHz IF, and the IIP3 is -6.08 dBm.
Keywords :
CMOS integrated circuits; biomedical communication; biomedical electronics; low noise amplifiers; low-power electronics; mixers (circuits); prosthetics; MICS; capacitor cross-coupled common gate LNA; input matching; low power merged LNA-mixer design; medical implant communication services; noise performance; power consumption; relaxed voltage headroom; weak inversion; Impedance matching; Microwave integrated circuits; Mixers; Noise; Power demand; Radio frequency; Receivers; CMOS RF; LNA; MICS; low power; mixer; sub-threshold; weak inversion;
Conference_Titel :
Life Science Systems and Applications Workshop (LiSSA), 2011 IEEE/NIH
Conference_Location :
Bethesda, MD
Print_ISBN :
978-1-4577-0421-5
DOI :
10.1109/LISSA.2011.5754153
