A safety monitoring system on an automated chemical processing plant receives a 3-bit binary input representing decimal values from 0 to 7. The input bits are PPP, QQQ, and RRR, where P P\,P is the most significant bit (MSB) and R R\,R is the least significant bit (LSB).
The Boolean algebra expression for the system's alarm output W W\,W is given by:
W=(P+Q‾)⋅R‾ W = (P + \overline{Q}) \cdot \overline{R} W=(P+Q)⋅RDeduce all the decimal numbers from 0 to 7 that will cause the alarm output W W\,W to become logic 1.
5 exam-style questions on AQA A Level Physics Digital signal processing (A-level only), covering Combinational logic (A-level only), Sequential logic (A-level only), and Astables (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.