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Introduction to PSpice

This lab guide, prepared by Engr. Mian Shahzad Iqbal, introduces students to PSpice for analyzing Thevenin's theorem in digital electronics. It covers essential elements of circuit representation, including voltage and current sources, and defines the transfer function analysis. Students will learn to simulate circuits, measure node voltages, and understand small-signal characteristics. The lab emphasizes practical applications with components such as resistors and power calculations, providing a comprehensive hands-on experience in telecommunication engineering.

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Introduction to PSpice

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  1. Introduction to PSpice Digital Electronics LAB No.3 Engr. Mian Shahzad Iqbal Lecturer Department of Telecommunication Engineering

  2. SPICE • SPICE is a general-purpose circuit simulator capable of performing the following types of analysis

  3. Representation

  4. Dimension • Each element has a unit (dimension) which are as follows

  5. SPICE BASIC ELEMENTS • The basic elements of electronic circuits can be represented by the first letter

  6. Thevenin's Analysis • LAB N0.3 Thevenin's Analysis • VIN 1 0 DC 10V ; Voltage source of 10 V DC • IS 4 3 DC 2A ; Current source of 2 A DC • VX 4 5 DC 0V ; Measures the current through R5 • R1 1 2 5 • R2 2 3 10 • R3 2 0 20 • R4 3 4 40 • R5 5 0 10 • .TF V(2,4) VIN ; Transfer function analysis • .END ; End of circuit file

  7. Output • NODE VOLTAGE NODE VOLTAGE NODE VOLTAGE NODE VOLTAGE • ( 1) 10.0000 ( 2) 12.5000 ( 3) 23.7500 ( 4) -11.2500 • ( 5) -11.2500 • VOLTAGE SOURCE CURRENTS • NAME CURRENT • VIN 5.000E-01 • VX -1.125E+00 • TOTAL POWER DISSIPATION -5.00E+00 WATTS • **** SMALL-SIGNAL CHARACTERISTICS • V(2,4)/VIN = 6.250E-01 • INPUT RESISTANCE AT VIN = 2.000E+01 • OUTPUT RESISTANCE AT V(2,4) = 1.094E+01

  8. Schematic Circuit

  9. Output

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