modul week 7 introduction to pspice. introduction spice = simulation program for integrated circuit....
TRANSCRIPT
Modul week 7
Introduction to PSpice
Introduction SPICE = Simulation Program for
Integrated Circuit. Industrial based simulation. Same function as Multisim. PSpice
is used to simulate Analog circuit Digital circuit Mixed signal circuit
Types of circuit analysis DC analysis(DC transfer curve) Transient analysis(Output as a function
of time) AC analysis(Output as a function of
frequency) Noise analysis Sensitivity analysis Distortion analysis Fourier analysis Monte Carlo analysis
Steps in simulating a circuit
Figure: The steps involved in simulating a circuit with PSpice.
Values of elements T or Tera (= 1E12) G or Giga (= E9) MEG or Mega (= E6) K or Kilo (= E3) M or Milli (= E-3) U or Micro (= E-6) N or Nano (= E-9) P or Pico (= E-12) F of Femto (= E-15)
LAB 5: PSPICE FOR DC ANALYSIS
Experiment involved:4.1 Basic DC Nodal Analysis5.1 Basic DC Sweep Analysis5.2 Diode I-V Characteristic5.3 Maximum Power Transfer
4.1
Basic DC Nodal Analysis
How to start?
STARTAll ProgramsMicroSim Eval 8Schematics
Step 1: Creating the circuit in Capture
1. Create new project:
Figure: Schematic windows and toolbars
2. Place the components and connect part
DrawGet new Part..
Figure: Place part window
Example: Complete connection
Figure: Bias point detail simulation
VIEWPOINT
IPROBE
BUBBLE
Step 2: Specifying the type of analysis and simulationAnalysisSetup For all analysis selected except Bias Point Detail, click
on the function button to fill in all the requirements.
Figure: Analysis Setup Dialog Box
Step 3: Create netlist
AnalysisCreate netlist
(Nothing will appear)
Step 4: Run the simulation
AnalysisSimulate
Figure: Simulated circuit
Step 5: Examine the netlist
AnalysisExamine netlist (To show the node names, position of each component and value of each component).
Figure: Schematic netlist
Step 6: To examine the content of the output file
AnalysisExamine Output (Print out)
Figure: Content of output file
Step 6: To examine the content of the output file (Continue)
Schematic netlist
Schematic aliases
Step 6: To examine the content of the output file (Continue)
Date and time of simulation
Voltage drop at each nodeCurrent flow
at Vx and V2Aliases
5.1Basic DC Sweep Analysis
DC sweep analysis- Adds more flexibility- Allow DC sources to change voltages or
current.Eg: From previous simulation, 15V VDC
will produce a 97.26mV Vo. But for this experiment, the input VDC is varied from 0-25V and a range
of Vo is produced.
DC Sweep Analysis Circuit
1. Build the circuit
Vx = 0 – 25V
DC Sweep Analysis Circuit (Continue)
2. AnalysisSetup
DC Sweep Analysis Circuit (Continue)
3. Double click DC Sweep button.
Range of Vx = 0-25V with increment 1V
Select voltage source
Select linear type
DC Sweep Analysis Circuit (Continue)
4. AnalysisExamine netlist5. AnalysisSimulate
DC Sweep Analysis Circuit (Continue)
6.Microsim Probe
DC Sweep Analysis Circuit (Continue)
7. From the microsim probe, click TraceAdd
DC Sweep Analysis Circuit (Continue)
5.3Maximum Power Transfer
Maximum Power Transfer Theorem
- To obtain maximum power from a source with a fixed internal resistance, the resistance of the load must be made the same as that of the source.
Maximum Power Transfer (Continue)
1. Wire the following circuit
Figure: The schematic circuit
Maximum Power Transfer (Continue)
2. Double click RL and set the value of RL as {RL_val}
Maximum Power Transfer (Continue)
3. Double click PARAMETERS
We would like to vary the value of RL. To do this we need to define the value of RL as a parameter. Type the text {RL_val} on the set attribute value for resistor RL.
Maximum Power Transfer (Continue)
4. AnalysisSetup. Enabled DC sweep.
Select Global Parameter because we are varying RL_val
Number of points to plot
Maximum Power Transfer (Continue)
5.Simulate. If there is no error, the Microsim Probe window will appear.
Maximum Power Transfer (Continue)
6. Add trace
Maximum Power Transfer (Continue)
Output in linear form
Maximum Power Transfer (Continue)
Output in log form. Change x-axis setting to log form. PlotX Axis-SettingScaleLog
Maximum Power Transfer (Continue)