About the cic ip core, Altera dsp ip core features, Cic ip core features – Altera CIC MegaCore Function User Manual
Page 3: About the cic ip core -1, Altera dsp ip core features -1, Cic ip core features -1
About The CIC IP Core
1
2014.12.15
UG-CIC
The Altera
®
CIC IP core implements a cascaded integrator-comb (CIC) filter with data ports that are
compatible with the Avalon
®
Streaming (Avalon-ST) interface. CIC filters (also known as Hogenauer
filters) are computationally efficient for extracting baseband signals from narrow-band sources using
decimation. They also construct narrow-band signals from processed baseband signals using
interpolation.
CIC filters use only adders and registers; they require no multipliers to handle large rate changes.
Therefore, CIC is a suitable and economical filter architecture for hardware implementation, and is widely
used in sample rate conversion designs such as digital down converters (DDC) and digital up converters
(DUC).
Altera DSP IP Core Features
• Avalon Streaming (Avalon-ST) interfaces
• DSP Builder ready
• Testbenches to verify the IP core
• IP functional simulation models for use in Altera-supported VHDL and Verilog HDL simulators
CIC IP Core Features
• Interpolation and decimation filters with variable rate change factors (2 to 32,000), a configurable
number of stages (1 to 12), and two differential delay options (1 or 2).
• Single clock domain with selectable number of interfaces and a maximum of 1,024 channels.
• Selectable data storage options with an option to use pipelined integrators.
• Configurable input data width (1 to 32 bits) and output data width (1 to full resolution data width).
• Selectable output rounding modes (truncation, convergent rounding, rounding up, or saturation) and
Hogenauer pruning support.
• Optimization for speed by specifying the number of pipeline stages used by each integrator.
• Compensation filter coefficients generation.
• IP functional simulation models for use in Altera-supported VHDL and Verilog HDL simulators.
• DSP Builder ready.
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