In the Sine wave oscillator circuit often to be use the thermistor and Incandescent lamp, for upset the output of circuit has fixed value, the resistance of the thermistor dependent on temperature and as a result to voltage drop across of it. From the slow response of the thermistor make to properties of temperature against resistance is not linear like with that do not distortion value in this oscillator circuit. In this circuit, we use a zener diode in performs this function instead by is used to limit a voltage. Then, the bridge circuit consisting of R1, R2 and C1, C2 are defined the frequency of the generator. And, the active devices in the circuit, Q1, Q2 will need to has a gain ratio nearly three times so will be completed produce the frequency. When the output is reached to the maximum value. The ZD1 will start to conduct current [...]

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