Introduction to Hspice
How to Install and Run
Saied Barati
BSc Computer Engineer, SUT
[email protected]
Introduction to HSpice
Introduction to Hspice
How to Install
Netlist
Circuit Analysis
Introduction to HSpice
•
Simulation Program with Integrated Circuit
Emphasis
Developed in 1970’s at Berkeley
 Many commercial versions are available
 HSPICE is a robust industry standard
 Has many enhancements that we will use

•
Written in FORTRAN for punch-card machines
Circuits elements are called cards
 Complete description is called a SPICE deck

Introduction to HSpice
1)
First Download it!
Link:
(Go to Course Home Page!)
Introduction to HSpice
2) Now Crack it!
Add
“license.dat”
to
“environment variables”
with the name of
“LM_License_file”
Note:
HSpice (amoozesh).pdf  Page 2-4
Introduction to HSpice
Netlist = text-based description of circuit
•
•
netlist does not use symbols or graphical elements
 makes it simple to learn but hard to visualize
 usually need a companion schematic
netlist describes
 circuit elements (resistors, capacitors, etc.)
 power supplies, input voltages, bias currents, etc.
 connections between circuit elements
 analysis method; defines data to be calculated
Introduction to HSpice
Netlist Structure:
Title (Required)
 Circuit
 Subcircuit(s)
 Device Models
 Analysis
 Output
 .end (Required)

Introduction to HSpice
Simple inverter circuit
•
***** Define power supplies and sources *****
V1 1 0 10
R1 1 2 10
R2 2 0 30
R3 2 3 200
V1 VDD 0 5
VPULSE VIN 0 PULSE 0 5 2N 2N 2N 98N 200N
***** Analysis statement *****
.TRAN 1n 300n
.END
Introduction to HSpice
First line is title of simulation
 → statements are ignored
First character in every line specifies how HSPICE interprets
the remaining line
First line of a netlist:


Any character
Title or comment line
Subsequent lines of netlist, and all lines of included files:



.(XXXX): Netlist keyword (e.g.: .TRAN 0.5ns 20ns)
C, D, E, F, G, H, I, J, K, L, M, Q, R, S, V, W: Element
instantiation
* (asterisk): Comment line (HSPICE)
Introduction to HSpice
Names begin with the
element key letter
(exception: subcircuits)
• Maximum name length:
1024 characters
•
First Letter
Circuit Element or Source
C
capacitor
D
diode
I
independent current source
V
independent voltage source
R
resistor
Q
bipolar junction transistor
M
MOSFET
Introduction to HSpice
Resistor
r<name> <terminal 1> <terminal 2> <value>
•
Capacitor
c<name> <terminal 1> <terminal 2> <value>
•
Diode
D<name> <terminal 1> <terminal 2> <model>
•
Ex:
R1 n1 n2 20k
Type: Resistor
Name: R1
Connected nodes: n1, n2
Value: 20kΩ * 2= 40kΩ
D1 a b DMOD
Type: Diode
Name: D1
Connected nodes: a, b
Model: DMOD
Introduction to HSpice
Numbers can be


Integer
Floating point
Introduction to HSpice
Vxx/Ixx n+ n- DC=dcval tranfun
Vxx:
with V
Ixx:
with I
n+, n-:
DC=dcval:
Voltage source element name, must begin
Current source element name, must begin
Positive and negative node
DC source keyword and value (in volts)
Ex: VX 1 0 5V
Introduction to HSpice
Vxx/Ixx n+ n- PULSE v1 v2 td tr tf pw per








PULSE: Keyword
v1: Initial value of the voltage or current
v2: Pulse plateau value
td: Delay to the first ramp
tr: Duration of the rising ramp
tf: Duration of the falling ramp
pw:
Pulse width
per:
Pulse repetition period
v2
v1
td
tr
pw
tf
per
Time
Introduction to HSpice
Comment:
First letter of line is asterisk (*) → whole line is comment
 Dollar sign ($) anywhere on the line → text after is comment
For example:


* <comment_on_a_line_by_itself>
-or<HSPICE_statement> $ <comment_following_HSPICE_input>
Introduction to HSpice
1) .TRAN <Tstep> <Tstop>
 <Tstep>: time step
 <Tstop>: End time (duration) of simulation
Ex: .tran 0.02 2.0
2) .DC <source> <vstart> <vstop> <vstep>
 <source>: source point
 <vstart>: start voltage
 <vstop>: stop voltage
 <vstep>: voltage step
Ex: .DC Vin 0 1.8 0.1
Introduction to HSpice
Introduction to Hspice
How to Install
Netlist
Circuit Analysis
Introduction to HSpice
Useful links:





http://www.allaboutcircuits.com
http://www.ecircuitcenter.com/SPICEsummary.htm
http://www.tkt.cs.tut.fi/kurssit/8404142/K05/H10/v
lsi/hs_device.html
http://www.ece.uci.edu/docs/hspice/hspice_2001_2
-11.html
http://www.seas.upenn.edu/~jan/spice/spice.exHspi
ce.html