NCO IP Core: User Guide

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ID 683406
Date 11/06/2017
Public
Document Table of Contents
Document Table of Contents x
1. About the NCO IP Core 2. NCO IP Core Getting Started 3. NCO IP Core Functional Description A. NCO IP Core User Guide Document Archives 4. Document Revision History
1. About the NCO IP Core x
1.1. Intel® DSP IP Core Features 1.2. NCO IP Core Features 1.3. DSP IP Core Device Family Support 1.4. NCO IP Core MegaCore Verification 1.5. NCO IP Core Release Information 1.6. NCO IP Core Performance and Resource Utilization
2. NCO IP Core Getting Started x
2.1. Installing and Licensing Intel® FPGA IP Cores 2.2. IP Catalog and Parameter Editor 2.3. Generating IP Cores ( Intel® Quartus® Prime Pro Edition) 2.4. Simulating Intel® FPGA IP Cores
2.1. Installing and Licensing Intel® FPGA IP Cores x
2.1.1. Intel® FPGA IP Evaluation Mode 2.1.2. NCO IP Core Intel® FPGA IP Evaluation Mode Timeout Behavior
2.3. Generating IP Cores ( Intel® Quartus® Prime Pro Edition) x
2.3.1. IP Core Generation Output ( Intel® Quartus® Prime Pro Edition)
3. NCO IP Core Functional Description x
3.1. NCO IP Core Architectures 3.2. Multichannel NCOs 3.3. Frequency Hopping 3.4. Phase Dithering 3.5. Frequency Modulation 3.6. Phase Modulation 3.7. NCO IP Core Parameters 3.8. NCO IP Core Interfaces and Signals
3.1. NCO IP Core Architectures x
3.1.1. Large ROM Architecture 3.1.2. Small ROM Architecture 3.1.3. CORDIC Architecture 3.1.4. Multiplier-Based Architecture
3.7. NCO IP Core Parameters x
3.7.1. Architecture Parameters 3.7.2. Frequency Parameters 3.7.3. Optional Ports Parameters
3.8. NCO IP Core Interfaces and Signals x
3.8.1. Avalon-ST Interfaces in DSP IP Cores 3.8.2. NCO IP Core Signals 3.8.3. NCO IP Core Timing Diagrams
1. About the NCO IP Core
2. NCO IP Core Getting Started
3. NCO IP Core Functional Description
A. NCO IP Core User Guide Document Archives
4. Document Revision History

3.5. Frequency Modulation

You can add an optional frequency modulator to your custom NCO variation. You can use the frequency modulator to vary the oscillator output frequency about a center frequency set by the input phase increment. This option is useful for applications in which the output frequency is tuned relative to a free-running frequency, for example in all-digital phase-lock-loops.

You can also use the frequency modulation input to switch the output frequency directly.

You can set the frequency modulation resolution input in the IP core. The specified value must be less than or equal to the phase accumulator precision.

The NCO IP core also provides an option to increase the modulator pipeline level; however, the effect of the increase on the performance of the NCO IP core varies across NCO architectures and variations.

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