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Digital Electronics and Logic Gates
Quick questions on Building logic systems explained: O-Level Electronics Digital Electronics
2short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What are spotting the gate from the words?Show answer
The language of the specification points to the gates:
What is building the expression from the truth table?Show answer
If the wording is complex, build the table first, then read off each row where the output is 1. Each such row contributes a term: an AND of the inputs (inverted where they are 0 in that row), and the terms are joined by OR. This guarantees a correct expression even when the description is awkward.
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