Introduction: Why Use a DSP?
In order to understand the usefulness of programmable Digital Signal Processing, I will first draw an analogy and then explain the special environments where DSPs are used.
A DSP is really just a special form of microprocessor. It has all of the same basic characteristics and components; a CPU, memory, instruction set, buses, etc. The primary difference is that each of these components is customized slightly to perform certain operations more efficiently. We’ll talk about specifics in a moment, but in general, a DSP has hardware and instruction sets that are optimized for high-speed numeric processing applications and rapid, real-time processing of analog signals from the environment. The CPU is slightly customized, ...
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