Design for Realizing Arbitrary Fractional Divider Based on FPGA which Duty Cycle is up to 50%

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This paper proposes a novel method for realizing arbitrary fractional divider based on FPGA. Analyzing the limitations of the existing frequency-divided methods, a new model which consists of two-level dividers is put forward. An arbitrary frequency-divided clock output can be obtained by this method approaching 50% of duty cycle. When the division factor is greater than 128, the duty cycle can be very close to 50% of the clock output. This method is proved to be feasible on the FPGA chip of ALTERA.

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1653-1657

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August 2013

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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