Digital Signal Transmission
This appendix reviews some basic concepts in information systems for those who have not studied microprocessor systems in the context of a broader electronics course or have limited knowledge of communication principles.
Frequency Components
Digital signals have the signal characteristics of a square wave, containing higher frequency components. These are described by the Fourier series for instantaneous signal voltage of the square wave with equal high and low (mark and space) periods:
where Vf is the fundamental amplitude and ω (omega) the angular frequency (ω=2πf).
Therefore, a microprocessor clock signal ...
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