alexa NRZ DPLL CMOS Frequency Synthesizer Using Active PI Filter | Abstract
ISSN ONLINE(2278-8875) PRINT (2320-3765)

International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering
Open Access

OMICS International organises 3000+ Global Conferenceseries Events every year across USA, Europe & Asia with support from 1000 more scientific Societies and Publishes 700+ Open Access Journals which contains over 50000 eminent personalities, reputed scientists as editorial board members.

Open Access Journals gaining more Readers and Citations

700 Journals and 15,000,000 Readers Each Journal is getting 25,000+ Readers

This Readership is 10 times more when compared to other Subscription Journals (Source: Google Analytics)

Research Article Open Access


This paper demonstrates a CMOS frequency synthesizer design, whose primary purpose is to test the designer’s high speed, mixed-signal CMOS circuit design skill. Line codes are the techniques for representing digital sequences by pulse waveforms suitable for baseband transmission. NRZ or non return to zero is an important Line coding method. NRZ pulses are of full bit duration. We do not get square waveform in conventional current starved VCO. So, the conventional current starved VCO cannot be used for generating NRZ line coding as it is necessary that the output waveform of VCO should be square wave for NRZ coding. This new current starved CMOS VCO is used to design a DPLL. Furthermore, this DPLL design is used to generate a clock for a 8.33Mbits/second with NRZ data format for center frequency at VCO. The DPLL presented here uses XOR phase detector for reducing jitter noise and divide by two stage is used in the feedback loop for frequency synthesis. The DPLL is designed uses active PI filter.

To read the full article Peer-reviewed Article PDF image | Peer-reviewed Full Article image

Author(s): Krishna Kant Singh , Akansha Mehrotra

Share This Page

Additional Info

Loading Please wait..
Peer Reviewed Journals
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version