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A 26μW, Two-stage VCO and Mixer for Direct DPSK Conversion in MedRadio

Authors:
Ilya Chigrev
Predrag Spasojevic
Jeffrey Walling

Keywords: Low Power CMOS; MedRadio; Passive Mixer; Ring Oscillator; Vance Demodulator

Abstract:
A 26μW voltage controlled oscillator (VCO) and mixer have been designed in an 130nm RF CMOS process for a direct conversion DPSK demodulator in the MedRadio frequency band (401-406MHz). The circuit utilizes a two-stage (VCO) design directly coupled to a passive ring mixer. With biasing circuits it requires an active die area of 49×39 um. The circuit is designed to operate from a 1 V supply and achieves a post-extracted simulated phase noise of -118dBc/Hz when injection locked. With the passive mixer, conversion gain is -18.4dB.

Pages: 84 to 87

Copyright: Copyright (c) IARIA, 2015

Publication date: October 11, 2015

Published in: conference

ISSN: 2308-4219

ISBN: 978-1-61208-433-6

Location: St. Julians, Malta

Dates: from October 11, 2015 to October 16, 2015