NDLI: A 400 MHz reconfigurable injection-locking based RC oscillator for ASK/FSK modulation

Content Provider	IEEE Xplore Digital Library
Author	Brito, K. Rangel de Sousa, F. Sobral, V.A. Nunes de Lima, R. Silverio Freire, R.C.
Copyright Year	2013
Description	Author affiliation: Univ. Fed. do Reconcavo da Bahia (UFRB), Cruz das Almas, Brazil (Brito, K.) \|\| Univ. Fed. de Santa Catarina (UFSC), Florianopolis, Brazil (Rangel de Sousa, F.) \|\| Univ. Fed. de Campina Grande (UFCG), Campina Grande, Brazil (Silverio Freire, R.C.) \|\| Univ. Fed. da Bahia (UFBA), Salvador, Brazil (Sobral, V.A.; Nunes de Lima, R.)
Abstract	In this work an RC oscillator, operating at 404.5MHz, MICS (Medical Implant Communication Service) band, is evaluated for both ASK/FSK modulation and injection locking based FSK (Frequency Shift Keying) demodulation. The oscillator, which consists of a cross-coupled relaxation topology, is analyzed and evaluated in 130 nm IBM CMOS technology. Injection locking is driven by a differential current signal. ASK (Amplitude Shift Keying) and FSK modulation are performed by controlling the cross-coupled bias current and the MOS varactor capacitance respectively. Simulation results show that, at the free-running frequency of 404.5 MHz, the oscillator presents a phase noise of -126.36 and -133 dBc/Hz at 1MHz and 10 MHz offset frequency respectively, while consuming 50 micro Watts of power from a 1V supply voltage. The oscillator frequency locking range, for a 1 micro Ampère injected current, is 398 MHz to 410 MHz which covers the whole MICS band.
Sponsorship	IEEE Circuits Syst. Soc.
Starting Page	1
Ending Page	4
File Size	626836
Page Count	4
File Format	PDF
ISBN	9781479911325
DOI	10.1109/SBCCI.2013.6644876
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-09-02
Publisher Place	Brazil
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency shift keying Demodulation Injection-locked oscillators Amplitude shift keying Microwave integrated circuits ASK/FSK modulation RC CMOS oscillator MICS band
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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