modified 9 years ago

Synchronous binary counter

00:33:44

The LSB always toggles, easily done by feeding back to its Dan inverted Q. For higher-order bits the rule for counting in binary is to toggle only when all lower-order bits are ls. Because an XOR is an "optional inverter," this is easily done by feeding each D input from an XOR, one of whose inputs comes from the corresponding Q, and the other from an AND of all lower-order Q's.

published 9 years ago

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