A Modular Phase-Frequency Detector Design with 2n? Linear Range of Operation

To extend the linearity range of the phase-frequency detector/charge pump (PFD/CP) circuit, a modular design for a novel PFD architecture is proposed. The new circuit yields a modular extension range of -2Npi to 2Npi, where N is an integer representing the order of the PFD/CP extension. The efficacy...

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Bibliographic Details
Published in:Circuits, systems, and signal processing systems, and signal processing, 2004-08, Vol.23 (4), p.273
Main Authors: Moura, Luis, Borjak, Assaad
Format: Article
Language:English
Subjects:
Circuits
Closed loop systems
Integer programming
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Summary:To extend the linearity range of the phase-frequency detector/charge pump (PFD/CP) circuit, a modular design for a novel PFD architecture is proposed. The new circuit yields a modular extension range of -2Npi to 2Npi, where N is an integer representing the order of the PFD/CP extension. The efficacy of the new PFD/CP is demonstrated by the improved frequency acquisition time obtained via closed-loop simulation. Hence, the developed architecture is a good candidate for phase-locked loops requiring the use of PFD/CP with a broad linear range of operation. [PUBLICATION ABSTRACT]
ISSN:0278-081X
1531-5878
DOI:10.1007/s00034-004-3052-9