after the switch has been in the down position 2 long

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Unformatted text preview: st, one terminal has to be at the neutral, (the  ­ terminal in figure P2 ­2) which limits the types of circuits that can be created (but is fine for us). Second, op amp saturation limits the range of response. Third, there can be initialization issues. Also, problems getting the simulated inductor to work are often due to the op amp power supply. Remember that the +9V and –9V supplies are with reference to the neutral, or ground, node, so the 9V batteries must be connected at one end to the ground node. See Lab 3 for a circuit diagram showing specific power supply connections. Set ­up • • Build the circuit of Figure P2 ­2 using the simulated inductor you built in step 2a. Note that the battery in P2 ­2 is also the +9V supply for the op amp. (You may want to use an extra +9V battery.) • Have your multimeter for measurements. Measurements and calculations Comment Measure the current, either directly with your multimeter or by observing the voltage across the 1 Ω resistor. (Use the measured resistance value of the 1 Ω resistor for current calculations.) • • • After the switch has been in the down position (2) long eno...
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