Expt_24 - Lab-in-a-Box Experiment 24: The Wien-Bridge...

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Lab-in-a-Box Experiment 24: The Wien-Bridge Oscillator Name: ______________________ Pledge: _____________________ ID: ______________________ Date: ______________________ Procedure R 1 8 2 0 8 2 0 R 2 V o R f 2 2 k +9V 1 0 k 0 + C 2 0 . 1 u 8 . 2 k - C 1 0 . 1 u V 2 + - 0 -9V U 1 L F 3 5 6 N 3 2 7 4 6 1 5 + - V + - O U T B 1 B 2 R g Figure 1: Circuit Diagram for Wien bridge oscillator. Analysis: 1. Determine the expected frequency of oscillation generated by the Wien-bridge oscillator shown in Figure 1. 1 of 2
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Measurements: 2. Using a digital multimeter, measure the actual resistances of the 22 kΩ resistor, the 8.2 kΩ resistor, and the trim pot at its highest resistance value. 3. Using the measured values of the resistances, calculate the gain ( 2 / o V V ) of the circuit. What do you expect the output to be? 4. Using the digital multimeter, measure the resistance of the trim pot at its lowest resistance value. 5. Using the resistances of the resistors found in step 2 and the trim pot value measured in step 4, calculate the gain of the circuit. What do you expect the output to be?
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Expt_24 - Lab-in-a-Box Experiment 24: The Wien-Bridge...

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