Lab 25 Oscillators

# Lab 25 Oscillators - waveform had the least amount of...

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Objectives 1. To demonstrate the Wien bridge oscillator 2. To demonstrate the RC phase-shift oscillator. Equipment List 1. 741 operational amplifier 2. DC power supplies 3. Resistors 1-10MΩ, 2-10KΩ, 3-1KΩ, 2-560Ω 4. Capacitors: 3-0.47 μ F, 3-0.22 μ F 5. Potentiometers: 1-500KΩ 1-1KΩ 6. Dual trace oscilloscope Systematic Procedure 1. To demonstrate the Wien bridge oscillator by connecting Figure 1.

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2. Connect an oscilloscope set to ac input coupling so that v o can be views. With R 1 =R 2 = 10KΩ and C 1 =C 2 =0.1 μ F, and then I adjusted the 1KΩ potentiometer until the output

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Unformatted text preview: waveform had the least amount of distortion. Then I measured and recorded the frequency =145.5Hz 3. Replace C 1 and C 2 with 0.22 with 0.22 μ F. Frequency =71.84Hz 4. Replace C 1 and C 2 with 0.47 with 0.22 μ F. Frequency =33Hz 5. Replace R 1 and R 2 with 1KΩ. a. Replace C 1 and C 2 with 0.22 with 0.22 μ F. Frequency=733.7Hz b. Replace C 1 and C 2 with 0.47 with 0.22 μ F. Frequency= 334.9Hz...
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## This note was uploaded on 10/24/2011 for the course ELET 3720 taught by Professor Hayes during the Spring '08 term at North Texas.

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Lab 25 Oscillators - waveform had the least amount of...

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