2. SPICE (Simulation Program for Integrated Circuits
Emphasis) is a general purpose analog circuit
simulator that is used to verify circuit designs and
to predict the circuit behavior.
PSpice is a PC version of SPICE
The name orcad is reflecting the company
oregon+CAD.
3. 1.Draw an electronic or electrical circuit on
the computer using Capture.
2. Simulate it with PSpice using specific
models for your devices.
3. Analyse its behaviour with Probe, which
can produce a range of plots.
Historically this was a separate application
but it is now integrated with PSpice.
4. Non-linear DC analysis(steady state dc)
Non-linear transient analysis (sinusoidal
sources)
Linear AC (circuits with sources of varying
frequencies)
Noise analysis
Sensitivity analysis
Distortion analysis
Fourier analysis(calculate and plot frequency
spectrum)
Monte Carlo Analysis
5. Independent and dependent voltage and current sources
Resistors
Capacitors
Inductors
Transmission lines
Operational amplifiers
Switches
Diodes
Bipolar transistors
MOS transistors
JFET
MESFET
Digital gates
555
and many other essential components.
7. These are files that contain reusable part data.
They can be custom or default ones
Flat Design
◦ Small designs
◦ All pages in same schematic
◦ Off Page connectors are
used
◦ Figure shows design
hierarchy
8. Hierarchical Design
◦ Much complex designs
◦ Symbols are created called
“Hierarchical Blocks”
9. Part is a basic building block which may
represent
◦ One or more physical element
◦ Function
Simulation model
When a part is placed for first time its entry is
done in “Design Cache”.
10. PSpice is not case sensitive
All element names must be unique
There must be a node designated "0" (Zero).
This is the reference node against which all
voltages are calculated.
11. File New Project Analog or Mixed A/D
Make sure to choose Analog or Mixed A/D and proper l
12. Next comes following window
Make sure you select “Create a blank project”
13. This is how a typical “Schematic” Window will
look like
14. Now start placing components and
connecting them.
After completing the circuit save it and run it
15. Take example of a high pass filter (RC)
First we will follow initial steps of creating a
new project
Now placing the components.
24. The frequency response of a circuit is helpful
to understand its behaviour when it is driven
with simple sine waves.
Settings for a transient simulation.