EE 322

Lab 0: PSpice

In this lab we will review or start to learn to use PSpice.

• We will use PSpice to simulate and test different current mirror designs. In this we will sweep (DC sweep) the value of the load resistor. Simulate the current mirrors in figures (HH) 2.45, 2.47, 2.48. Use Probe to plot I vs load. Detailed instructions.

  Use the plots of current versus load resistance and voltage versus load resistance to find where the circuit switches from trying to supply a constant current to supplying a constant voltage. Explain why this occurs. Find R out and the compliance voltage.

• Use a voltage controlled voltage source (E) as an op-amp. With an inverting gain of 10 show that the output is correct for an input of 1V. HINT: set the gain of the voltage source to 100,000.0 Detailed instructions.

• Simulate two amplifiers using the u741 and the LF411 op-amps each with a gain of 10. Plot the frequency response of each using an AC Sweep. Find the response to a 100kHz sin wave using Transient analysis.