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Design and Implementation of Glitch-Free Phase Switching Plls to Suppress Quantization Noise

Author(s): M. Ansar Ali Baig

Journal: International Journal of Engineering Research and Applications
ISSN 2248-9622

Volume: 3;
Issue: 5;
Start page: 73;
Date: 2013;
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Keywords: Glitch-free | phase switching (PS) | phase switching multi-modulus frequency divider (PS-MMFD) | phase-locked loops (PLLs) | quantization noise (QN) suppression

A programmable frequency divider for quantization noise suppression in fractional- phase-locked loops is presented in this paper. The proposed phase switching Multi-modulus frequency divider (PS-MMFD) utilizes a novel glitch-free phase switching (PS) divide-by-0.5/1/1.5/2 cell to reduce the frequency division step to 0.5 and its QN induced by modulation is thus suppressed by additional 6 dB. Compared with other frequency dividers used for QN suppression, the proposed glitch-free PS-MMFD is more robust, can operate at higher input frequency and consumes less power.
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