October 2006
Intermediate to advanced
544 pages
20h 23m
English
Content preview from Digital Systems: Principles and Design
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313Sequential Logic, Latches and Flip-Flops
Often things are done in a sequential manner. For example, in order to prepare tea,
firstly water is boiled, and then leaves are added. A sequential job means (i) to remember
what steps are to be done next, and (ii) to recall which step has just been finished.
A storage device or a series of storage devices are needed in order to do the things se-
quentially, so that a step (or steps) that has been previously done can be recalled. The basic
unit to store this information in a digital circuit is Flip-Flop (FF). In analog electronics, a
capacitor can hold (memorize) the earlier applied potential difference ...
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