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Phase Frequency Detector With Minimal Blind Zone for Fast Frequency Acquisition

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3 Author(s)
Wu-Hsin Chen ; Sch. of Electr. & Comput. Eng., Purdue Univ., West Lafayette, IN, USA ; Inerowicz, M.E. ; Byunghoo Jung

Blind zone in a phase-frequency detector (PFD) reduces the input detection range and aggravates cycle slips. This brief analyzes the blind zone in latch-based PFDs and proposes a technique that removes the blind zone caused by the precharge time of the internal nodes. With the proposed technique, the PFD achieves a small blind zone close to the limit imposed by process-voltage-temperature variations. The comparison between the proposed design and previous works is presented. Fabricated in a 130-nm CMOS technology, the measured blind zone is 61 ps, which is smaller than that of the existing topologies by almost 100 ps.

Published in:

Circuits and Systems II: Express Briefs, IEEE Transactions on  (Volume:57 ,  Issue: 12 )

Date of Publication:

Dec. 2010

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