Electrical Engineering › Section R · Digital concepts, number systems, and codes › Topic R.2
Basic logic, combinational, and sequential functions
Three simple operations, NOT, AND and OR, are the raw material of every digital system. This topic defines them, then surveys the larger functions built from them, from adders and decoders to counters and memories, and the key split between circuits that remember and circuits that do not.
In this topic
- Logic from true-or-false statements
- NOT: the inverter
- AND and OR
- Worked example: a garage-door rule
- Combinational and sequential logic
- Comparison and arithmetic
- Encoding, decoding and code conversion
- Data selection: multiplexers
- Storage and counting
- Worked example: a car-park sign
- Common mistakes to avoid
- Key takeaways
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