Requires: SmartSpice & Smartview

Minimum Versions: SmartSpice 4.6.5.R, SmartView 2.26.1.R

Example 8 demonstrates a circuit input deck where a .TRAN anlysis is performed and the save/recover feature is used. Rubberband the parameter cload[cap] to see the influences on circuit performance.

Input Files

rubberband_example_08.in

*Rubberband Save/Recovery Feature example
* Rubberband parameters:
* CLOAD[cap]

VIN  1 0  DC 0  SIN(0 0.1 5MEG)  AC 1
VCC  8 0  DC 10
VEE x3.9 0  DC -12 
RS1  1 2  1K
RS2  5 0  1K
RC1  3 8  10K
RC2  4 8  10K 
RBIAS  7 8  20K
CLOAD  3 4  5PF m=5
Q1  3 2 6  QNL
Q2  4 5 6  QNL
Q3  6 7  x3.9  QNL 
Q4  7 7  x3.9  QNL
.MODEL QNL NPN(BF=80 RB=100 CCS=2PF TF=0.3NS TR=6NS CJE=3PF CJC=2PF
+   VA=50)

.TRAN 5NS 500NS from_step=100n 420n 10n to=450NS  
 
.save v(4)

.OPTIONS ACCT RELTOL=0.001 NOMOD  

.END