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goldy.
Joined: 17 Aug 2006
Posts: 20
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 21 Sep 2006 9:45 which is better edge trigerring or level trigerring and why |
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as we know that there are two types of trigerring level as well as edge which one is prefferred and why . give a proper reason beyond which u can said this is better.
a simple one but important question on base of interview so plz ans it . plz give ur views fully
thanks in advance.
thanks a lot friends to help me.
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its_thepip
Joined: 15 Sep 2006
Posts: 44
Helped: 2
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| 08 Oct 2006 8:22 Re: which is better edge trigerring or level trigerring and |
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Hi
I feel edge triggering is better than level triggering
The problem with level triggering is the Race Around Condition where the output state cannot be determined during level triggering
So, to overcome this we gor edge triggering
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budhy
Joined: 21 Oct 2006
Posts: 840
Helped: 185
Location: Indonesia
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| 30 Oct 2006 17:03 Re: which is better edge trigerring or level trigerring and |
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| With edge trigger you have an exact time to activated flip flop
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ycj
Joined: 20 Oct 2006
Posts: 62
Helped: 11
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| 01 Nov 2006 6:49 which is better edge trigerring or level trigerring and why |
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In the main stream of synchronous digital design, edge triggering is considered as the better way.
However, since level triggering usually implemented by latches, it costs less area.
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cydi
Joined: 12 Dec 2006
Posts: 170
Helped: 11
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| 18 Dec 2006 7:46 which is better edge trigerring or level trigerring and why |
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| Well... it depends on tha application. Edge triggering can cause problems (real huge ones) if the system is noisy (having glitches). Level triggering can lead to race conditions. So its upon the designer to use the appropriate one. Edge triggering is used more commonly as the glitches are easier to avoid.
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zeeshanzia84
Joined: 29 May 2006
Posts: 199
Helped: 19
Location: Pakistan / Germany
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| 18 Dec 2006 8:40 Re: which is better edge trigerring or level trigerring and |
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To summarize:
1. LEVEL TRIGGERING: is usually based on latches, which take approxmiately HALF the area of flip-flops. This is the reason, the internal architecture of most modern FPGAs is based on LATCHes (Clive Maxfield - "Design Warrior's Guide to FPGA")
2. EDGE TRIGGERING: takes greater area but is more immune to corruptions due to noise or incalculable delays in different signals.
Thus, both latches and flip-flops (level-trig. & edge-trig. are used) in practice, in different applications; and involve a trade-off as to which one has to be selected.
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jsps
Joined: 20 Apr 2006
Posts: 61
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| 30 Jan 2007 15:10 Re: which is better edge trigerring or level trigerring and |
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| Edge triggering is better if your design is having very small glitches. level trigerring is not so reliable, this is what I feel.
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msadek_eng
Joined: 28 May 2004
Posts: 112
Helped: 5
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| 30 Jan 2007 16:23 Re: which is better edge trigerring or level trigerring and |
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Edge trigerring is suitable if your system has
1- small noises
2- require fast response
level trigerring is the best if your system has
1- multi sources of noise (Long distances, noisy inviroment ,...)
2- require slow response
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sivakumar_tumma
Joined: 27 Jan 2007
Posts: 215
Helped: 7
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| 07 Feb 2007 11:09 Re: which is better edge trigerring or level trigerring and |
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| level triggering is not useful when state machines are being built....
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maharshi_qis
Joined: 14 Feb 2007
Posts: 247
Helped: 6
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| 05 Apr 2007 16:39 Re: which is better edge trigerring or level trigerring and |
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| Level triggering is generally obsolete these days..since we can generate almost glitch less clocks using accurate clocking schemes gnerally we r going 4 edge triggering these days..
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muralicrl
Joined: 06 Feb 2008
Posts: 281
Helped: 30
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| 13 Mar 2008 11:25 Re: which is better edge trigerring or level trigerring and |
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Hi,
Egde triggering is the wise solution, because you will be knowing at what time the data is stable.
If you need more details, contact me.
Regards,
N. Muralidhara
CRL-BEL
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