Flicker noise conversion in CMOS LC oscillators: capacitance modulation dominance and core device sizing |
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Authors: | Jian Chen Fredrik Jonsson Mats Carlsson Charlotta Hedenäs Li-Rong Zheng |
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Affiliation: | (1) Department of Engineering Science, Sonoma State University, Rohnert Park, CA 94928, USA;(2) Department of Electrical Engineering and Computer Science, The University of Tennessee, Knoxville, TN 37996, USA;(3) Department of Mechanical, Aerospace and Biomedical Engineering, The University of Tennessee, Knoxville, TN 37996, USA |
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Abstract: | This paper reports a low-voltage low-power injection-locked oscillator suitable for short range wireless transmitter applications
in a wireless body area network (WBAN). Low-power transmitter with high efficiency is a major design challenge for short range
wireless communication. Unlike conventional transmitters used for cellular communication, injection-locked transmitter shows
reduced power consumption and high transmitter efficiency. The core block of an injection-locked transmitter is an injection-locked
oscillator. In this work a low-voltage low-power injection-locked LC oscillator has been designed and fabricated employing
self-cascode structure and body-terminal coupling. The proposed oscillator has been realized using 0.18-μm RF CMOS process.
Experimental results indicate that the prototype oscillator can operate with a supply voltage as low as 0.9 V and consumes
only 1.4 mW of power. The relatively low-voltage and low-power operation of the design makes it highly suitable for low-power
transmitter applications. |
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