A Self Calibrated Based Clock Generator for DLL

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Provided by: International Journal of Engineering, Science and Innovative Technology (IJESIT)
Topic: Hardware
Format: PDF
In this paper, a Delay-Locked Loop (DLL) based clock generator is designed which can be used mainly for dynamic frequency scaling. This DLL-based clock generator is found to have low-jitter and can provide the system clock with frequencies in the range of 0.5 to 8 times of reference clock, depending on the workload of the EISC processor. This proposed analog self-calibration method and a phase detector with an auxiliary charge pump can effectively reduce the delay mismatch between the delay cells in the voltage-controlled delay line and the static phase offset due to the current mismatch in the charge pump, respectively.
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