[SI-LIST] HSpice implementation of recursive convolution
- From: "Radoslaw Piesiewicz" <piesiewicz@xxxxxxxxxxxxx>
- To: "Signal Integrity" <si-list@xxxxxxxxxxxxx>
- Date: Mon, 1 Sep 2003 16:09:22 +0200
Hi,
I have a problem, namely how to implement the following code (it is recursive
convolution) in HSpice, the code is from some simulator that works similarly to
HSpice. The problem is to calculate the current Curr, it is done in two step
process
at every step in the transient analysis (at the intervals of FIXED parameter).
The problem is in implementing the part CALC ... ENDCALC
Thanks
Code:
Var k_11 1.0G
Var p_1 -5.0G
Var dt 2p
Var theta FUNC=(p_1**2+exp(p_1*dt))
Var x=0
Var i_eq 0
Var v=0
Res 'portVCCS' n1 n2 1.0 G=k_11*theta
Curr 'portCurr' n1 n2 TRAN=i_eq
Cap 'Cload' n2 GND 1p
Volt 'Vin' n1 GND TRAN=1*(t>0)
Sweep ''
+ LOOP 1001 TIME LIN 0 2n FIXED
+ X 't' 's' 0 2n MULTX='n'
+ Y 'u_(out)' 'V' 0 2
CALC
v = Vtran(n1) - Vtran(n2)
x= x+theta*v
x= exp(p_1*dt)*x+ exp(p_1*dt-1)*v
i_eq=k_11*x
ENDCALC
Show Y Vtran(n2)
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - -
Dipl.-Ing. Radoslaw Piesiewicz
Fraunhofer Institute Reliability and Microintegration (IZM) -
University of Paderborn
Advanced System Engineering (ASE), Electromagnetic Field Analysis
Technologiepark 34, 33100 Paderborn
Tel.: ++49 (0)5251/5402-121 Fax.: ++49 (0)5251/5402-105
E-Mail: radoslaw.piesiewicz@xxxxxxxxxxxxx http://www.pb.izm.fhg.de
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