Boolean algebra

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Covers Karnaugh maps, boolean algebra (De Morgan’s Laws, distribution, association, commutation, double negation), logic gate diagrams and truth tables, D type flip flops, half and full adders

Computer Science

A-Level Computer Science

OCR

Data Types, Data Structures and Algorithms

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4 Terms

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State the purpose of a D-type flip-flop circuit.

  • Store a value of 1 bit

  • When a signal is given

2
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Describe the inputs and outputs used by a D-type flip-flop circuit, explaining how the inputs are used to control the outputs

  • Data and clock input

  • Q output (outputs the value stored by the flip-flop)

  • When clock input goes high/ on rising edge of clock input (when it changes from 0 to 1) Q changes to data

  • NOT Q is reverse of Q

<ul><li><p><strong>Data </strong>and <strong>clock </strong>input</p></li><li><p><strong>Q </strong>output (outputs the value stored by the flip-flop)</p></li><li><p>When clock input goes high/ <strong>on rising edge of clock input</strong> (when it changes from 0 to 1) <strong>Q changes to data</strong></p></li><li><p>NOT Q is reverse of Q</p></li></ul><p></p>
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