Processor Architecture for High Performance Video Decode
Processor Architecture for High Performance Video Decode
Vendor:
Zipcores Electronic Systems Engineering S.L.
Category:
Filters Transforms
Direct Digital Synthesizer / Periodic waveform generator
The DDS IP Core is a high-precision Direct Digital Synthesizer2 used for the generation of periodic waveforms.
Overview
The DDS IP Core is a high-precision Direct Digital Synthesizer2 used for the generation of periodic waveforms. On each rising-edge of the sample clock and when the clock-enable is high, the phase in the phase accumulator is incremented by the value phase_inc. This phase is quantized to 16-bits and passed as an address to a look-up table which converts the phase into a waveform.
To save resources, the look-up table is implemented as a quarter sine wave (16384 x 15-bit samples). These samples are manipulated to generate 65536 x 16-bit samples over the range 0 to 2Pi. By setting the generic parameter lutsize to 12 or 8, the size of the LUT can be reduced further to (1024 x 11-bit) or (64 x 7-bit) if required.
In addition to the quadrature outputs sin_out and cos_out, the DDS also provides square wave and sawtooth outputs: squ_out and saw_out. All output values are 16-bit signed numbers.
Key features
- Synthesizable, technology independent IP Core fro FPGA, ASIC and SoC
- Supplied as human readable VHDL (or Verilog) source code
- 16-bit signed output data samples
- 32-bit phase accumulator (tuning word)
- 32-bit phase shift feature
- Phase resolution of 2π / 216
- Frequency resolution of FS / 232 (FS = sample frequency)
- Phase dithering option for improved SFDR
- ≈ 100 dB SNR and > 110 dB SFDR (with phase dithering enabled)
- Simultaneous SIN, COS, square and sawtooth outputs
- Optimized quarter-wave LUT for reduced area footprint
- Sample rates of 350 MHz+1
Block Diagram
DDS block diagram
Applications
- Digital oscillators and phase-locked loops
- Digital modulation/demodulation
- Digital up/down converters and mixers
- Generation of quadrature (complex) signals
- Versatile waveform generation
Files
Note: some files may require an NDA depending on provider policy.
Specifications
Identity
Part Number
DDS
Vendor
Zipcores Electronic Systems Engineering S.L.
Type
Silicon IP
Provider
Zipcores Electronic Systems Engineering S.L.
HQ:
Spain
Zipcores design and sell IP Cores for implementation on all semiconductor devices. Founded in 2008, we are a team of experienced Engineers with a broad knowledge of digital hardware design spanning various fields. Our specific areas of expertise include Digital Video, DSP, Digital Modulation and high-speed interfaces.
We offer a wide range of IP Cores for a variety of applications from basic building blocks to more complex systems. Our cores are supplied as clear readable VHDL or Verilog source-code and are synthesizable across multiple technologies - whether it be FPGA, ASIC or SoC.
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Frequently asked questions about Filters and Transforms IP cores
What is Direct Digital Synthesizer / Periodic waveform generator?
Direct Digital Synthesizer / Periodic waveform generator is a Filters Transforms IP core from Zipcores Electronic Systems Engineering S.L. listed on Semi IP Hub.
How should engineers evaluate this Filters Transforms?
Engineers should review the overview, key features, supported foundries and nodes, maturity, deliverables, and provider information before shortlisting this Filters Transforms IP.
Can this semiconductor IP be compared with similar products?
Yes. Buyers can compare this product with similar semiconductor IP cores or IP families based on category, provider, process options, and structured technical specifications.