Experiment2

# Experiment2 - Experiment 2 An active circuit element an...

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Experiment 2 An active circuit element: an amplifier Assemble an amplifier An operational amplifier is a very high gain differential amplifier. That means the output Voltage is proportional to the difference between the two input voltages. For most applications it is used with some type of a feedback. That means some fraction of the output voltage (V out in Figure 1) is fed back to the input terminal (terminal 2 in Figure 1). In this lab, you are to make an amplifier using a simple feedback circuit as shown and measure its characteristics. You will connect your circuit using the proto-board. The standard connections to the power supply are -12 V to pin 4 and +12 V to pin 7 (see Figure 2). These must be connected for all circuits. Connections to the input pins 2 and 3 and the output pin 6 will depend on the purpose of the circuit. The pin numbers on the device are shown in the photograph of Figure 2 in red. Homework 1) In order to make an amplifier with a gain of 10, you need two resistors with a ratio of 10 to 1. You have a 1 k resistor that you must use for the input resistor but other students have used all of the 10 k resistors. You have a 22.5 k resistor. What other resistor do you need to combine with the 22.5 k to make a 10k resistor? 2)

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## This note was uploaded on 02/24/2009 for the course PHYS 2CL taught by Professor Bodde during the Fall '08 term at UCSD.

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Experiment2 - Experiment 2 An active circuit element an...

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