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mohazaga
Joined: 18 Aug 2005
Posts: 155
Helped: 1
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 05 Apr 2007 16:43 What are the Pulse parameters? |
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Hi ,,,
In my design i use pulse as input to my ckt , so what are the pulse parameters should i use for pulse simulation (falling t, raising t, delay t, etc) to get close results.
thanks
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Yahia Muhammad
Joined: 30 Mar 2006
Posts: 93
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| 05 Apr 2007 17:51 Re: What are the Pulse parameters? |
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well
1- width (duration)
2- amplitude
3- delay
4- rise time
5- fall time
6- frequency
7- duty cycle
i don't know if f forgot somthing
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drabos
Joined: 03 Jan 2006
Posts: 433
Helped: 27
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| 05 Apr 2007 18:21 What are the Pulse parameters? |
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and in Cadence analogLib for vpulse: DC value, AC phase, AC magnitude, min voltage and max voltage, period, noise, XF magnitude, PAC magnitude and phase, Temperature coeff. 1 , 2, Nominal temperature...
Everything depends on what is your circuit...
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flatulent
Joined: 19 Jul 2002
Posts: 4863
Helped: 292
Location: Middle Earth
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| 05 Apr 2007 19:12 Re: What are the Pulse parameters? |
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There is also ringing and sag.
Last edited by flatulent on 06 Apr 2007 14:16; edited 1 time in total |
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mohazaga
Joined: 18 Aug 2005
Posts: 155
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| 06 Apr 2007 4:51 Re: What are the Pulse parameters? |
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Hi ,,,
that is ok , but what the values of these parameters which close to real pulse signal ( to get real sim. results).
thanks
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drabos
Joined: 03 Jan 2006
Posts: 433
Helped: 27
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| 06 Apr 2007 10:38 What are the Pulse parameters? |
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real pulse, what you mean in real pulse, it depends what kind of real circuit makes it:-S
(what is your bandwidth, etc..)
Hard to answer for this without any other knowledge...
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flatulent
Joined: 19 Jul 2002
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Location: Middle Earth
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| 06 Apr 2007 14:19 Re: What are the Pulse parameters? |
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The rise and fall times are set by the frequency response bandwidth. Sag is set by any low frequency cutoff. Ringing is caused by the peaking at the high end of the frequency response.
If you want some typical values try 10 ns rise and fall with 10% duty cycle and 10 MHz pulse repetition rate. These are commonly done by logic ICs such as the 74hc family and similar ones.
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mohazaga
Joined: 18 Aug 2005
Posts: 155
Helped: 1
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| 07 Apr 2007 6:09 Re: What are the Pulse parameters? |
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Hi ,,,
Yes I want typical values of pulse parameters for simulation . Well, the freq. 100MHz with 50% duty cycle. What you mean by it's depending on ckt freq. response bandwidth (what is Sag?)?
thanks
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drabos
Joined: 03 Jan 2006
Posts: 433
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| 07 Apr 2007 19:55 What are the Pulse parameters? |
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it is not a big rule because if I am working with pulses I use 100 ps rise and fall time and 1 ns pulse width
Added after 56 seconds:
of course everything depends on the bandwidth of your system
if you need for UWB application, you can see the standard
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mohazaga
Joined: 18 Aug 2005
Posts: 155
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| 09 Apr 2007 2:42 Re: What are the Pulse parameters? |
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Hi
even me I work with same values for UWB application . Is it ok?
what u mean by bandwidth?
thanks
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mohazaga
Joined: 18 Aug 2005
Posts: 155
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| 12 Apr 2007 4:03 Re: What are the Pulse parameters? |
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Hi ,,,
What is the pulse standard for UWB applications?
thanks
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