Intel® Quartus® Prime Standard Edition User Guide: Design Optimization

ID 683230
Date 11/12/2018
Public
Document Table of Contents

7.8.3.2. Adjusting the Phase Shift

Use the equation to adjust the phase shift of an output clock of a PLL.

For normal mode, Tap VCO, Initial VCO, and Period VCO are governed by the following settings:

Tap VCO= Counter Delay- M Tap VCO

Initial VCO= Counter Delay- M Initial

Period VCO= In Clock Period x N÷M

For external feedback mode, Tap VCO, Initial VCO, and Period VCO are governed by the following settings:

Tap VCO= Counter Delay- M Tap VCO

Initial VCO= Counter Delay- M Initial

Period VCO= In Clock Period x N

(M+ Counter High+Counter Low)

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