Download Differential Amplifier.epb


To simulate a differential amplifier circuit.

Components Required

Opamp- 741 (1), Resistor- RC05 (4), AC voltage source- VGEN (2), DC voltage sourceVDC (2), Ground- SPL0 (5)

Circuit Diagram


Draw the circuit diagram after loading components from library. Assign net names for connections wherever necessary. Preprocess the circuit by invoking Simulation → Preprocess. Place waveform markers on input and output nodes. For placing waveform markers, select Tools → Instruments → set wave form Contents → Voltage waveform → Click on the required net and place the waveform marker. Run transient analysis after setting up required parameters.

To proceed with the simulation, the steps are as follows

Select Tools → Components → Component properties→ Change simulation parameters→ Click on the required component and change its values.

The values to be provided to the components are

OPAMP : 741 (Since it is a Subcircuit, no parameter is to be assigned)

Resistors : 1k (4)

VDC/1 (+V) : 15V

VDC/2 (-V) : -15V

VGEN (V1) : Select the source function as SIN and set its Properties as follows
VA (amplitude) : 5V
FREQ (frequency) : 1kHz

VGEN (V2) : Select the source function as SIN and set its Properties as follows
VA (amplitude) : 1V
FREQ (frequency) : 1kHz

For setting up simulation time and analysis types, select Simulation menu, choose Analysis. In the window pops up, select Transient analysis from tree view.

Enter following values:Step : 1µ
Final time : 5m
Max. Step : 10µ
Results : Select Waveform from drop down menu.

Click on Accept. Expand the Transient Analysis and select Waveform viewer, Select As Marked. Click on Accept. Select Transient Analysis. Run Analysis by clicking on Run button.