25:
163:
of its storage components is simultaneous. Ideally, the input to each storage element has reached its final value before the next clock occurs, so the behaviour of the whole circuit can be predicted exactly. Practically, some delay is required for each logical operation, resulting in a maximum speed
178:
Nearly all digital circuits, and in particular nearly all CPUs, are fully synchronous circuits with a global clock. Exceptions are often compared to fully synchronous circuits. Exceptions include self-synchronous circuits,
279:
148:
or latches. The output of a flip-flop is constant until a pulse is applied to its "clock" input, upon which the input of the flip-flop is latched into its output. In a synchronous logic circuit, an
159:
generates a string (sequence) of pulses, the "clock signal". This clock signal is applied to every storage element, so in an ideal synchronous circuit, every change in the
350:
582:
180:
620:
313:"Performance and side-channel attack analysis of a self synchronous montgomery multiplier processing element for RSA in 40nm CMOS"
89:
522:
246:
61:
625:
457:
68:
42:
570:
469:
504:
343:
108:
75:
785:
516:
452:
57:
46:
642:
510:
336:
759:
654:
674:
632:
293:"Energy Minimum Operation with Self Synchronous Gate-Level Autonomous Power Gating and Voltage Scaling"
168:
575:
560:
486:
446:
587:
492:
480:
130:
637:
415:
410:
145:
82:
35:
312:
731:
528:
172:
790:
743:
697:
565:
463:
400:
236:
150:
669:
664:
647:
367:
216:
201:
184:
167:
To make these circuits work correctly, a great deal of care is needed in the design of the
8:
716:
498:
420:
395:
359:
196:
122:
736:
721:
602:
440:
405:
241:
226:
692:
155:
292:
425:
316:
296:
221:
138:
615:
610:
592:
555:
550:
475:
435:
545:
320:
300:
779:
726:
709:
704:
211:
206:
141:
267:
231:
134:
160:
764:
430:
375:
328:
390:
24:
385:
380:
311:
Devlin, B.; Ueki, H.; Mori, S.; Miyauchi, S.; Ikeda, M.; Asada, K.
175:
is often used to determine the maximum safe operating speed.
164:
limitations at which each synchronous system can run.
49:. Unsourced material may be challenged and removed.
291:Devlin, Benjamin; Ikeda, Makoto; Asada, Kunihiro.
144:circuit, data is stored in memory devices called
129:is a digital circuit in which the changes in the
777:
344:
280:"self synchronous configurable logic blocks"
16:Digital circuit synchronized by clock signal
351:
337:
133:of memory elements are synchronized by a
181:globally asynchronous locally synchronous
109:Learn how and when to remove this message
523:Application-specific integrated circuit
358:
247:Application-specific integrated circuit
778:
332:
458:Three-dimensional integrated circuit
47:adding citations to reliable sources
18:
13:
470:Erasable programmable logic device
14:
802:
505:Complex programmable logic device
270:. "Self Synchronous FPGA". 2009.
23:
517:Field-programmable object array
453:Mixed-signal integrated circuit
34:needs additional citations for
305:
285:
273:
266:Asada and Ikeda Laboratories.
260:
1:
643:Hardware description language
511:Field-programmable gate array
253:
7:
655:Formal equivalence checking
190:
169:clock distribution networks
10:
807:
675:Hierarchical state machine
633:Transaction-level modeling
321:10.1109/ASSCC.2012.6570807
301:10.1587/transele.E95.C.546
268:"Self-synchronous Circuit"
752:
685:
601:
576:Digital signal processing
561:Logic in computer science
538:
487:Programmable logic device
447:Hybrid integrated circuit
366:
588:Switching circuit theory
493:Programmable Array Logic
481:Programmable logic array
638:Register-transfer level
786:Automata (computation)
529:Tensor Processing Unit
173:Static timing analysis
744:Electronic literature
698:Hardware acceleration
566:Computer architecture
464:Emitter-coupled logic
401:Printed circuit board
237:Arithmetic logic unit
185:asynchronous circuits
151:electronic oscillator
58:"Synchronous circuit"
670:Finite-state machine
648:High-level synthesis
583:Circuit minimization
217:Finite state machine
202:Asynchronous circuit
183:circuits, and fully
43:improve this article
717:Digital photography
499:Generic Array Logic
421:Combinational logic
396:Printed electronics
360:Digital electronics
197:Synchronous network
127:synchronous circuit
123:digital electronics
665:Asynchronous logic
441:Integrated circuit
406:Electronic circuit
242:Processor register
773:
772:
722:Digital telephone
693:Computer hardware
660:Synchronous logic
119:
118:
111:
93:
798:
426:Sequential logic
353:
346:
339:
330:
329:
323:
309:
303:
289:
283:
277:
271:
264:
222:Sequential logic
114:
107:
103:
100:
94:
92:
51:
27:
19:
806:
805:
801:
800:
799:
797:
796:
795:
776:
775:
774:
769:
748:
681:
616:Place and route
611:Logic synthesis
597:
593:Gate equivalent
556:Logic synthesis
551:Boolean algebra
534:
476:Macrocell array
436:Boolean circuit
362:
357:
327:
326:
310:
306:
290:
286:
278:
274:
265:
261:
256:
193:
115:
104:
98:
95:
52:
50:
40:
28:
17:
12:
11:
5:
804:
794:
793:
788:
771:
770:
768:
767:
762:
756:
754:
750:
749:
747:
746:
741:
740:
739:
734:
732:cinematography
724:
719:
714:
713:
712:
702:
701:
700:
689:
687:
683:
682:
680:
679:
678:
677:
667:
662:
657:
652:
651:
650:
645:
635:
630:
629:
628:
623:
613:
607:
605:
599:
598:
596:
595:
590:
585:
580:
579:
578:
571:Digital signal
568:
563:
558:
553:
548:
546:Digital signal
542:
540:
536:
535:
533:
532:
526:
520:
514:
508:
502:
496:
490:
484:
478:
473:
467:
461:
455:
450:
444:
438:
433:
428:
423:
418:
413:
408:
403:
398:
393:
388:
383:
378:
372:
370:
364:
363:
356:
355:
348:
341:
333:
325:
324:
304:
284:
272:
258:
257:
255:
252:
251:
250:
244:
239:
234:
229:
224:
219:
214:
209:
204:
199:
192:
189:
161:logical levels
117:
116:
31:
29:
22:
15:
9:
6:
4:
3:
2:
803:
792:
789:
787:
784:
783:
781:
766:
763:
761:
760:Metastability
758:
757:
755:
753:Design issues
751:
745:
742:
738:
735:
733:
730:
729:
728:
727:Digital video
725:
723:
720:
718:
715:
711:
708:
707:
706:
705:Digital audio
703:
699:
696:
695:
694:
691:
690:
688:
684:
676:
673:
672:
671:
668:
666:
663:
661:
658:
656:
653:
649:
646:
644:
641:
640:
639:
636:
634:
631:
627:
624:
622:
619:
618:
617:
614:
612:
609:
608:
606:
604:
600:
594:
591:
589:
586:
584:
581:
577:
574:
573:
572:
569:
567:
564:
562:
559:
557:
554:
552:
549:
547:
544:
543:
541:
537:
530:
527:
524:
521:
518:
515:
512:
509:
506:
503:
500:
497:
494:
491:
488:
485:
482:
479:
477:
474:
471:
468:
465:
462:
459:
456:
454:
451:
448:
445:
442:
439:
437:
434:
432:
429:
427:
424:
422:
419:
417:
414:
412:
409:
407:
404:
402:
399:
397:
394:
392:
389:
387:
384:
382:
379:
377:
374:
373:
371:
369:
365:
361:
354:
349:
347:
342:
340:
335:
334:
331:
322:
318:
314:
308:
302:
298:
294:
288:
281:
276:
269:
263:
259:
248:
245:
243:
240:
238:
235:
233:
230:
228:
225:
223:
220:
218:
215:
213:
212:Mealy machine
210:
208:
207:Moore machine
205:
203:
200:
198:
195:
194:
188:
186:
182:
176:
174:
170:
165:
162:
158:
157:
152:
147:
143:
142:digital logic
140:
136:
132:
128:
124:
113:
110:
102:
99:December 2015
91:
88:
84:
81:
77:
74:
70:
67:
63:
60: –
59:
55:
54:Find sources:
48:
44:
38:
37:
32:This article
30:
26:
21:
20:
791:Clock signal
686:Applications
659:
307:
287:
275:
262:
232:Control unit
177:
166:
154:
135:clock signal
126:
120:
105:
96:
86:
79:
72:
65:
53:
41:Please help
36:verification
33:
416:Memory cell
153:called the
780:Categories
765:Runt pulse
737:television
431:Logic gate
376:Transistor
368:Components
254:References
146:flip-flops
139:sequential
69:newspapers
621:Placement
411:Flip-flop
391:Capacitor
386:Inductor
381:Resistor
315:. 2012.
295:. 2012.
191:See also
137:. In a
626:Routing
460:(3D IC)
83:scholar
603:Design
539:Theory
525:(ASIC)
519:(FPOA)
513:(FPGA)
507:(CPLD)
472:(EPLD)
249:(ASIC)
227:Memory
85:
78:
71:
64:
56:
710:radio
531:(TPU)
501:(GAL)
495:(PAL)
489:(PLD)
483:(PLA)
466:(ECL)
449:(HIC)
156:clock
131:state
90:JSTOR
76:books
443:(IC)
125:, a
62:news
317:doi
297:doi
171:.
121:In
45:by
782::
187:.
352:e
345:t
338:v
319::
299::
282:.
112:)
106:(
101:)
97:(
87:·
80:·
73:·
66:·
39:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
