The Spectralizer includes the processor, CODEC, SRAM, Flash EPROM, LED decoder and the bar graph display. The inputs to Spectralizer are the left and right stereo audio line level signals and a mono microphone. The left and right channels are inputs from an audio source. The microphone input is used to capture the pink noise generated for environment spectral correction. The serial interface is used to control and/or display the output of the Spectralizer via a personal computer if desired. The Spectralizer's left and right outputs are fed back into the audio source signal path after spectral correction.
"Our aim is to encourage engineers to utilize new technologies by offering 'real-world' designs -- easily customized designs that interface to industry standard 'building blocks'," said Filip Verhaeghe, manager of Hamilton Hallmark's Technical Support Center in Tempe, Ariz. "The Spectralizer Reference Design Kit helps developers with limited resources get up-to-speed quickly with digital signal processing, giving cost and performance advantages in many embedded control applications."
Each Reference Design Kit is composed of design applications notes, a complete set of supplier data sheets, schematic drawings, a parts list, plus a 3.5-inch PC disk containing the schematic drawings, parts list and Gerber plot.
Hamilton Hallmark is a division of Avnet, Inc., a Fortune 100 service company listed on the New York Stock Exchange with annual sales of $3.5 billion. Headquartered in Culver City, Calif., Hamilton Hallmark is the industry-leading, value-added distributor of semiconductors, connectors, passive components and computer peripherals to commercial and military original equipment manufacturers through the United States and Canada.
March 1996, vol. 13, no. 2
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