initial commit / add all books

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+//example 8.5
+clc;
+clear;
+disp('Here what happens at each point in time' );
+disp('Time  t0: S = 0, R = 0,  no change in Q (Q remains 0)');
+disp('Time  t1: S = 1, R = 0,  Q changes from 0 to 1');
+disp('Time  t2: S = 0, R = 1,  Q resets to 0');
+disp('Time  t3: S = 1, R = 0,  Q sets to 1 ');
+disp('Time  t4: S = 0, R = 0,  no change in Q (Q remains 1)');
+disp('Notice that either R or S, or both, are allowed to change state at any time, whether C is high or low. The only time both R and S must be stable (unchanging) is during the short PTs of the clock.');
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