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Putting Analog On The Bus

Putting Analog On The Bus

The objective of this application note is to illustrate the idea of ‘computerizing analog functions’ and provide the design engineer with reference designs for controlling the key parameters of analog circuits using digitally controlled potentiometers connected to a computer bus.

The computer has extended the capabilities of electronics products and systems by adding the power of high speed control, computation, and programmability at a very low cost. There are, however, applications where the compact, continuous signal analog circuits are still the preferred design approach. We can, however, have the best of both worlds if we combine the advantages of the computer with the advantages of the analog circuits. This can be done through a Intersil digitally controlled potentiometer (XDCP); a system level control device performing a component level function.

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