* 6.012 Design Problem #1
* Tri-state pad driver

*
* Model Parameters
* ----------------
*
.MODEL N1 NMOS LEVEL=1 VTO=0.7 TOX=1.5E-08 KP=5E-05
+  LAMBDA=6.7E-02 CJ=1.0E-04 CJSW=5E-10 PB=0.8
.MODEL P1 PMOS LEVEL=1 VTO=-0.7 TOX=1.5E-08 KP=2.5E-05
+  LAMBDA=6.7E-02 CJ=3.0E-04 CJSW=3.5E-10 PB=0.8


*
* ******************************************************************
* ATTENTION!  THESE WAVEFORMS ARE INCORRECT.  USE THE ONES IN THE
* DESIGN PROBLEM #1 ADDENDUM (10/26/99).
* ******************************************************************
* 
* Standard Input Waveforms for Measuring Power
* --------------------------------------------
*
* Use the input waveforms given below  when you measure power dissipation.  
* These waveforms should be used with a transient simulation for 100ns.
* example:  .tran 50p 100n
*
* Also, for power measurement we want the voltage of the output capacitor
* to start at a predetermined value.  Use the following command to
* force the initial voltage to 0 volts.
* .ic v(OUTPUT) 0
*
* The actual command that tells HSPICE to measure power is:
*      .measure tran pdiss avg power from=0n to=100n
* .measure (which simulation) (name_you_choose) (average) (power) (starttime)
*       (endtime)
*
venn enablen 0 dc 0
+   pwl(0ns 3 50ns 3 52.5ns 0 100ns 0)
vd data 0 dc 0
+   pwl(0ns 0 10ns 0 12.5ns 3 30ns 3 32.5ns 0 70ns 0 72.5ns 3 90ns 3 
+   92.5ns 0 100ns 0)
vdn datan 0 dc 0
+   pwl(0ns 3 10ns 3 12.5ns 0 30ns 0 32.5ns 3 70ns 3 72.5ns 0 90ns 0 
+   92.5ns 3 100ns 3)

.tran 50p 100n
.ic v(output) 0
.measure tran pdiss avg power from=0n to=100n




*
* Automatic measurements in HSPICE
* --------------------------------
*
* HSPICE can measure a variety of conditions automatically.  This can save
* a lot of time compared to measuring and calculating by hand.
*
* To measure the propagation delay between two points:
* .measure tran tpd trig v(INPUT) val=1.5 fall=2 targ v(OUT) val=1.5 rise=1
*
* Instruction                    What it means
* --------------                 ----------------------------------------------
* .measure                       HSPICE automatic measurement
* tran                           use simulation results from transient analysis
* tpd                            name_you_choose
* trig v(INPUT) fall=2 val=1.5   start measuring when the voltage at node
*                                INPUT falls below 1.5 volts for the second
*                                time.
* targ v(OUT) rise=1 val=1.5     Stop at the first time node OUT rises
*                                above 1.5 volts.
*
*                __________             ____________
* IN    ________/          \___________/            \____________________
*
*       _________            ___________              ___________________
* OUT            \__________/           \____________/
* 
*                                                   ^^
*                                                 measures this delay.
*
*
* Look in your .out file for a line that looks like:
*   tpd            =  6.3960E-09  targ=  9.7646E-08   trig=  9.1250E-08
*
* All times are in seconds, so the trigger event happened at 91.2ns, the target
* event happened at 97.64ns, and the value of tpd is their difference, 6.39ns.
*
.measure tran tpd trig v(INPUT) val=1.5 fall=2 targ v(OUT) val=1.5 fall=1