From DSP-FPGA.com

Off-the-shelf data acquisition and control cards with an onboard DSP CPU often perform at only a fraction of their benchmark-based expectations. Increasing the number of channels, or increasing the sampling rate, begins to show signs of DSP CPU overload well before reaching full channel capacity.

Present-day market pressures are forcing data acquisition and control card providers to increase the number of channels on a data acquisition card, increase the sampling rate, and at the same time, reduce cost. Further, the actual function of the card is determined either during manufacturing or configured in-system. Sometimes designers expect the same card to perform different functions at different slots on the same system.

The use of a DSP CPU onboard, while providing the flexibility of hardware reuse across a wide range of applications, also becomes a bottleneck for board-level performance.

In this article, Shyam Chandra discusses a proposed architecture that would provide a low-cost, high-performance solution.

DSP CPU efficiency decreases with increased channel loading
As the number of channels increases, the load on the DSP engine also increases. This is due to the serial processing nature of current DSP CPUs, which are fetch/execute engines. In most applications, front-end preprocessing tasks, such as offset...


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Video Processor Boards
Video processor boards are used to process video, medical imaging, automated optical inspection, and other related activities. They can be fitted with between one and a thousand digital signal processing (DSP) units in order to increase the computing power of the board.
DSP Boards
Digital signal processor (DSP) computer boards are central to the implementation of high-performance industrial systems. They collect and process digital data from many sources, and distribute the results to other elements of the system.
CPU Cards and Modules
CPU cards and modules are computer boards that contain the central processing unit (CPU) of a computer.
Digital Signal Processors (DSP)
Digital signal processors (DSPs) are specialized microprocessors designed specifically for digital signal processing, usually in real-time. DSPs can also be used to perform general-purpose computations, but are not optimized for this function.
Audio Analyzers
Audio analyzers measure the noise and audio spectrum of output from an amplifier or a stereo.

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4DSP Inc. - Digitizer and Waveform Generator PMC/XMC
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FastImage1303 is an Autonomous Imaging System (AIS) that offers a balanced architecture of flexible I/O and processing power with computational and memory bandwidth, typically required by demanding,... (read more)
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Simultaneous 20-Channel, 14-bit ADC, operating up to 105MSPS with 250Mhz Bandwidth. The BenADIC provides high performance Analogue-to-Digital Data Conversion on a cPCI platform. High performance on... (read more)
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Topics of Interest

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