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- Contamination_delay abstract "In digital circuits, the contamination delay (denoted as tcd) is the minimum amount of time from when an input changes until any output starts to change its value. This change in value does not imply that the value has reached a stable condition. The contamination delay only specifies that the output rises (or falls) to 50% of the voltage level for a logic high. The circuit is guaranteed not to show any output change in response to an input change before tcd time units (calculated for the whole circuit) have passed. The determination of the contamination delay of a combined circuit requires identifying the shortest path of contamination delays from input to output and by adding each tcd time along this path.For a sequential circuit such as two D-flip flops connected in series, the contamination delay of the first flip-flop must be factored in to avoid violating the hold-time constraint of the second flip-flop receiving the output from the first flip flop. Here, the contamination delay is the amount of time needed for a change in the flip-flop clock input to result in the initial change at the flip-flop output (Q).If there is insufficient delay from the output of one flip-flop to the input of the next, the input may change before the hold time has passed. Because the second flip-flop is still unstable, its data would then be \"contaminated.\" Every path from an input to an output can be characterized with a particular contamination delay.Well-balanced circuits will have similar speeds for all paths through a combinational stage, so the minimum propagation time is close to the maximum. This corresponding maximum time is the propagation delay. The condition of data being contaminated is called a race.".
- Contamination_delay wikiPageExternalLink L04-4up.pdf.
- Contamination_delay wikiPageExternalLink timing-note.pdf.
- Contamination_delay wikiPageID "1275473".
- Contamination_delay wikiPageLength "2594".
- Contamination_delay wikiPageOutDegree "9".
- Contamination_delay wikiPageRevisionID "643108583".
- Contamination_delay wikiPageWikiLink Category:Timing_in_electronic_circuits.
- Contamination_delay wikiPageWikiLink Digital_electronics.
- Contamination_delay wikiPageWikiLink Flip-flop_(electronics).
- Contamination_delay wikiPageWikiLink MIT_Computer_Science_and_Artificial_Intelligence_Laboratory.
- Contamination_delay wikiPageWikiLink Massachusetts_Institute_of_Technology.
- Contamination_delay wikiPageWikiLink Morgan_Kaufmann_Publishers.
- Contamination_delay wikiPageWikiLink Propagation_delay.
- Contamination_delay wikiPageWikiLink Race_condition.
- Contamination_delay wikiPageWikiLink University_of_Massachusetts_Amherst.
- Contamination_delay wikiPageWikiLinkText "Contamination delay".
- Contamination_delay wikiPageUsesTemplate Template:Compu-hardware-stub.
- Contamination_delay wikiPageUsesTemplate Template:No_footnotes.
- Contamination_delay subject Category:Timing_in_electronic_circuits.
- Contamination_delay hypernym Amount.
- Contamination_delay type Disease.
- Contamination_delay type Circuit.
- Contamination_delay comment "In digital circuits, the contamination delay (denoted as tcd) is the minimum amount of time from when an input changes until any output starts to change its value. This change in value does not imply that the value has reached a stable condition. The contamination delay only specifies that the output rises (or falls) to 50% of the voltage level for a logic high.".
- Contamination_delay label "Contamination delay".
- Contamination_delay sameAs Q5164918.
- Contamination_delay sameAs m.04pbj6.
- Contamination_delay sameAs Q5164918.
- Contamination_delay wasDerivedFrom Contamination_delay?oldid=643108583.
- Contamination_delay isPrimaryTopicOf Contamination_delay.