CIC Compiler
from Altera Corporation
Version 7.0
- Preliminary support for Cyclone® III Devices
Features
The Altera CIC Compiler implements a cascaded integrator-comb filter MegaCore® function and supports the following features:
- Data ports are compatible with the Avalon® Streaming interface
- Easy-to-use MegaWizard® interface for parameterization and hardware generation
- Intellectual property (IP) functional simulation models for use in Altera-supported VHDL and Verilog HDL simulators
- Support for OpenCore Plus evaluation
- DSP Builder ready
- Selectable decimation or interpolation filter types
- Configurable number of stages (1 to 12)
- Interpolation and decimation rate change factors (1 to 32,000)
- Two differential delay options (1 or 2)
- Configurable input data width (1 to 32 bits)
- Configurable output data width (1 to full resolution data width)
- Selectable output rounding modes (truncation, convergent rounding, rounding up, or saturation)
- Single clock domain
- Up to 1,024 channels
- Hogenauer pruning support
General Description
CIC filters (also known as Hogenauer filters) are computationally efficient for extracting baseband signals from narrow-band sources using decimation, and for constructing narrow-band signals from processed baseband signals using interpolation.
Therefore, CIC allows for an economical hardware implementation of a filter, and is widely used in sample rate conversion designs such as digital down converters (DDC) and digital up converters (DUC). See Figures 1 and 2.
Figure 1. Three Stage Decimating CIC Filter Used in DDC
Figure 2. Three Stage Interpolating Filter Used in DUC
IP Evaluation
Use the Altera OpenCore Plus Evaluation flow to test drive this suite of IP cores.
Performance & Resource Utilization
Typical expected performance and utilization figures for this core are provided in the User Guide.
Technical Support
For technical support on this MegaCore function, please visit the Altera mySupport online issue tracking system. You may also search for related topics on this function in the Altera Knowledge Database.
Related Documents
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