Publication: Low frequency oscillator design
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Date
2012-06-01
Authors
Mokhtar, Nurhuda
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Abstract
The purpose of this project is to design and produce system that can generate sine wave with frequency in range of 50 Hz to 20 kHz. The main focused is to generate frequency in range of 50 Hz to 20 kHz that has frequency and amplitude voltage stability. To produce this circuit there is a lot of problem occurs such as difficulties to get the component and circuit connection. Oscillator circuit is a self-generated circuit. The supply voltage is only supply to the op amp UA741CN with supply voltage is ±12𝑉 . This circuit can produced minimum frequency until 51.3 Hz by using 3uF and maximum frequency is 37.46 kHz by using 60 nF. To produce frequency of 20 kHz, capacitor 60 nF and resistor with value of 100 ohm is use. Oscillator circuit has switches and variable resistor for easy tuning frequencies. For user convenient, this circuit has been transfer to the PCB board with small size and placed it in the black box. Example of application for this circuit is function generator, which is use to test the other circuit. Simulation software that has been use is circuit simulator (Multisim student version)software and Microsoft Excel to analyze the result. Procedures involved in this project understand concept, design and produced circuit until analyze the final circuit. As conclusion, the objective of this project achieved.