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- Q173245 subject Q7036095.
- Q173245 subject Q7464734.
- Q173245 subject Q9711069.
- Q173245 abstract "In digital circuit theory, sequential logic is a type of logic circuit whose output depends not only on the present value of its input signals but on the sequence of past inputs, the input history. This is in contrast to combinational logic, whose output is a function of only the present input. That is, sequential logic has state (memory) while combinational logic does not. Or, in other words, sequential logic is combinational logic with memory.Sequential logic is used to construct finite state machines, a basic building block in all digital circuitry, as well as memory circuits and other devices. Virtually all circuits in practical digital devices are a mixture of combinational and sequential logic.A familiar example of a device with sequential logic is a television set with "channel up" and "channel down" buttons. Pressing the "up" button gives the television an input telling it to switch to the next channel above the one it is currently receiving. If the television is on channel 5, pressing "up" switches it to receive channel 6. However if the television is on channel 8, pressing "up" switches it to channel "9". In order for the channel selection to operate correctly, the television must be aware of which channel it is currently receiving, which was determined by past channel selections. The television stores the current channel as part of its state. When a "channel up" or "channel down" input is given to it, the sequential logic of the channel selection circuitry calculates the new channel from the input and the current channel.Digital sequential logic circuits are divided into synchronous and asynchronous types. In synchronous sequential circuits, the state of the device changes only at discrete times in response to a clock signal. In asynchronous circuits the state of the device can change at any time in response to changing inputs.".
- Q173245 wikiPageExternalLink en.pdf.
- Q173245 wikiPageWikiLink Q1144416.
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- Q173245 wikiPageWikiLink Q176452.
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- Q173245 wikiPageWikiLink Q2164847.
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- Q173245 wikiPageWikiLink Q249997.
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- Q173245 wikiPageWikiLink Q5297.
- Q173245 wikiPageWikiLink Q599031.
- Q173245 wikiPageWikiLink Q616554.
- Q173245 wikiPageWikiLink Q629971.
- Q173245 wikiPageWikiLink Q7036095.
- Q173245 wikiPageWikiLink Q7464734.
- Q173245 wikiPageWikiLink Q76505.
- Q173245 wikiPageWikiLink Q8075.
- Q173245 wikiPageWikiLink Q9711069.
- Q173245 comment "In digital circuit theory, sequential logic is a type of logic circuit whose output depends not only on the present value of its input signals but on the sequence of past inputs, the input history. This is in contrast to combinational logic, whose output is a function of only the present input. That is, sequential logic has state (memory) while combinational logic does not.".
- Q173245 label "Sequential logic".