[SI-LIST] Re: random vectors
- From: Ray Anderson <Raymond.Anderson@xxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Wed, 5 Feb 2003 11:34:45 -0800 (PST)
This topic has been covered on the list not too long ago.
See a message from Wis Macomson on 22 Nov 2002
(//www.freelists.org/archives/si-list/11-2002/msg00263.html )
where he provide PERL code to accomplish the task of generating
PRBS values in a PWL statement.
Here is the output using the code's default values:
* PRBS(127), seed=0, 32 bits
* 1 0 0 0 0 0 1 1 0 0 0 0 1 0 1 0 0 0 1 1 1 1 0 0 1 0 0 0 1 0 1 1
* bit time=1.5e-09 sec, rise/fall=1.5e-10 sec
.PARAM VOL=0 VOH=1.5
Vn IN+ IN- PWL (
+ 0.0000e+00 VOH
+ 1.5000e-09 VOH
+ 1.6500e-09 VOL
+ 9.0000e-09 VOL
+ 9.1500e-09 VOH
+ 1.2000e-08 VOH
+ 1.2150e-08 VOL
+ 1.8000e-08 VOL
+ 1.8150e-08 VOH
+ 1.9500e-08 VOH
+ 1.9650e-08 VOL
+ 2.1000e-08 VOL
+ 2.1150e-08 VOH
+ 2.2500e-08 VOH
+ 2.2650e-08 VOL
+ 2.7000e-08 VOL
+ 2.7150e-08 VOH
+ 3.3000e-08 VOH
+ 3.3150e-08 VOL
+ 3.6000e-08 VOL
+ 3.6150e-08 VOH
+ 3.7500e-08 VOH
+ 3.7650e-08 VOL
+ 4.2000e-08 VOL
+ 4.2150e-08 VOH
+ 4.3500e-08 VOH
+ 4.3650e-08 VOL
+ 4.5000e-08 VOL
+ 4.5150e-08 VOH
+ 4.8000e-08 VOH
+ R=0 TD=1e-10 )
Also see Weston Beal's Java based Pulse Train Generator program
at: ftp://supportnet.mentor.com/pub/mentortech/icx/utilities/pulsetrain.zip
Here is a sample that programs output:
Vprbs7 prbs7out 0 PWL( 0.0n Vhi
+ 0.4n Vhi 0.410n Vlo 2n Vlo 2.01n Vhi 2.400n Vhi 2.41n Vlo
+ 2.800n Vlo 2.81n Vhi 4.800n Vhi 4.810n Vlo 5.600n Vlo 5.61n Vhi
+ 6n Vhi 6.01n Vlo 6.4n Vlo 6.41n Vhi 6.800n Vhi 6.810n Vlo
+ 7.2n Vlo 7.21n Vhi 8.4n Vhi 8.41n Vlo 9.200n Vlo 9.21n Vhi
+ 10n Vhi 10.01n Vlo 10.4n Vlo 10.41n Vhi 10.8n Vhi 10.81n Vlo
+ 12n Vlo 12.01n Vhi 12.4n Vhi 12.41n Vlo 13.200n Vlo 13.21n Vhi
+ 14.8n Vhi 14.81n Vlo 16n Vlo 16.01n Vhi 16.400n Vhi 16.410n Vlo
+ 16.8n Vlo 16.810n Vhi 17.2n Vhi 17.21n Vlo 18.8n Vlo 18.810n Vhi
+ 19.6n Vhi 19.610n Vlo 21.6n Vlo 21.610n Vhi 22n Vhi 22.01n Vlo
+ 24.400n Vlo 24.410n Vhi 27.200n Vhi 27.210n Vlo 27.6n Vlo 27.610n Vhi
+ 28n Vhi 28.01n Vlo 28.400n Vlo 28.410n Vhi 28.8n Vhi 28.810n Vlo
+ 29.200n Vlo 29.210n Vhi 29.6n Vhi 29.610n Vlo 30.400n Vlo 30.410n Vhi
+ 31.200n Vhi 31.210n Vlo 32n Vlo 32.01n Vhi 33.2n Vhi 33.21n Vlo
+ 33.6n Vlo 33.61n Vhi 34.800n Vhi 34.81n Vlo 35.2n Vlo 35.21n Vhi
+ 35.6n Vhi 35.61n Vlo 36.4n Vlo 36.41n Vhi 36.800n Vhi 36.81n Vlo
+ 37.2n Vlo 37.21n Vhi 38n Vhi 38.01n Vlo 39.2n Vlo 39.21n Vhi
+ 40n Vhi 40.01n Vlo 40.400n Vlo 40.410n Vhi 42n Vhi 42.01n Vlo
+ 42.400n Vlo 42.410n Vhi 43.2n Vhi 43.21n Vlo 43.6n Vlo 43.61n Vhi
+ 44n Vhi 44.01n Vlo 44.400n Vlo 44.410n Vhi 45.2n Vhi 45.21n Vlo
+ 45.6n Vlo 45.61n Vhi 46.400n Vhi 46.410n Vlo 47.2n Vlo 47.21n Vhi
+ 47.6n Vhi 47.61n Vlo 48.400n Vlo 48.410n Vhi 48.800n Vhi 48.81n Vlo
+ 50n Vlo 50.01n Vhi 50.800n Vhi )
-Ray Anderson
Sun Microsystems Inc.
>
>
>You could always write a program that generates the appropriate HSPICE
>voltage control command that generated psuedo-random vectors (remember, in
>finite-state machines there are no easy real random things).
>
>You write the program, you generate the voltage source control line, you
>paste it into your HSPICE deck..... done!
>
>regards,
>Jon Powell
>
>-----Original Message-----
>From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]On
>Behalf Of Yoni Tzafrir
>Sent: Wednesday, February 05, 2003 9:38 AM
>To: Si-List (E-mail)
>Subject: [SI-LIST] random vectors
>
>
>
>hi,
>can Hspice create a random vector of zeros and ones pulses?
>
>Yonatan (Yoni) Tzafrir
>*Tel: (972) - 3 - 7552300 (T/L: 351)
>*Fax: (972) - 3 - 6177130
> *Mobile: (972) -54- 459469
>*E-mail: <mailto:yonitz@xxxxxxxxxxxxx>
>
>
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