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DC1 - Digital circuits I how to build a computer...

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Digital circuits I: how to build a computer Introduction, or, Brief Statement of the Very Obvious Digital electronic circuits have become increasingly widespread, due at least in part, to advantages in noise reduction and the ease with which large, complex, but reliable, switchable circuits can be constructed. Digital computers, for the moment, represent the most recent evolutionary step of such circuits into generalised, reconfigurable information processors. The increased power and flexibility of digital signal processing techniques has been directly responsible for many significant advances in science and engineering in the last 20 years or so. Oh, and by the way, it is transforming our very existence, right now, if you read the papers. How to build a computer The basic building block is a gate . A gate acts like a switch, with one or more inputs and one output. Q = A A A B Q = A.B B B A A Q = A+B Q = A+B NOT AND OR NOR e t The operation of any binary switching element can be summarised in a Truth Table . The truth table shows the effect of the Boolean operators .
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