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A 2.45 GHz CMOS Voltage Controlled Ring Oscillator for Active Transponder

Authors:
Jubayer Jalil
Mamun Bin Ibne Reaz
Labonnah Farzana Rahman
Mohammad Marufuzzaman
Mohammad Syedul Amin

Keywords: VCRO; RFID; Transponder; CMOS; Differential

Abstract:
An improperly designed voltage controlled oscillator (VCO) for radio frequency (RF) phase locked loop (PLL) simply degrades performance of wireless communication. This paper proposes a low power ring oscillator based VCO developed for 2.45 GHz operated active readerless RFID transponder compatible with IEEE 802.11b protocol. In favor of easy integration and implementation of the module in small die size, a 3-stage differential delay cell has been adopted to fabricate the proposed voltage controlled ring oscillator (VCRO). 0.18 µm CMOS process is used for designing the proposed VCRO with 1.8 V power supply. Simulated results show that the proposed VCRO will work in the tuning range of 2.32 - 2.85 GHz and dissipate only 11.25 mW of power at 2.45 GHz. Thus, the proposed VCRO will be a vital module for active readerless RFID transponder.

Pages: 1 to 4

Copyright: Copyright (c) IARIA, 2012

Publication date: August 19, 2012

Published in: conference

ISSN: 2308-426X

ISBN: 978-1-61208-213-4

Location: Rome, Italy

Dates: from August 19, 2012 to August 24, 2012