CABLE-PULSER TEST CIRCUIT
!
!
TIME-STEP            0.25E-11
RESOLUTION-TIME      0.25E-10
END-TIME             200.0E-9
NUMBER-PRINTS        5
EXECUTE-CYCLES       ALL
ECHO                 YES
GRIDS                NO
MAX-POINTS           4001
DETAIL-PRINTS  FULL
!
!
!   THIS CIRCUIT IS A IDEALIZED CABLE PULSER.
!
!   July 2014
!
! With a 50-ns cable we will have a TL resolution of 0.5 ns (1%) and a time step 
! that is 1/10 of the TL resolution. Decreasing the Time Step below 1/10 TL Res time makes
! no difference.
! Decreasing the TL resolution time below 0.5 ns dramatically increases run time in V4.
! e.g. 0.5/0.025 - 4.5 sec ; 0.25/0.025 - 91 sec
! above this point time scales linearly with time step and TL res
! For a 50-ns cable the TLres increases node count dramatically
!
!
BRANCH
!
!
!
!
!    *********   50-ns charge line cable pulser   *************************
!
!    We model here a 50-ns-long transmission line that is initially charged to 1.0 volt:
!    (For output purposes, we refer to this as the IS, or the intermediate store.)
!
TRL  LIN  50.0E-9  1.0  1.0
INITIAL VTRL 2.0
!
UFO  VIN
$VISIN
UFO IIN
$IISIN
UFO PIN
$PISIN
UFO EIN
$EISIN
!
!
UFO VOUT
$VISOUT
UFO IOUT
$IISOUT
UFO POUT
$PISOUT
UFO EOUT
$EISOUT
!
!
!    ********   Output transmisison line   *************************************
!
!    We assume that the cable pulser discharges into two matched-impedance
!    transmission lines that are each 25 ns long:
!
TRL LIN 25.0E-9  1.0  1.0 
!
UFO  VIN
$V_TR1_in
UFO IIN
$I_TR1_in
UFO PIN
$PTRIN
UFO EIN
$ETRIN
UFO  VOUT
$V_TR1_out
UFO IOUT
$I_TR1_out

TRLine LINear 25.0e-9 1.0 1.0

!
!
!    **************  Matched-impedance terminating resistance   *************
!
!    We assume that the transmission line is terminated to ground in an arbitrary load:
!
RCG 0.5
!
!
UFO VIN
$VLOAD
UFO IIN
$ILOAD
UFO PIN
$PLOAD
UFO EIN
$ELOAD
!
