What is the sine wave oscillation circuit?

Last Update Time: 2019-01-09 12:05:39

Sine wave oscillation circuit can automatically output a certain frequency and amplitude of the sine wave without losing the signal, the application is very extensive.

1. Circuit classification

In accordance with the circuit structure, the sine wave oscillation circuit is generally divided into RC oscillation circuit, LC oscillation circuit and quartz crystal oscillation circuit.

( 1 ) The RC oscillator circuit mainly uses the resistor-capacitor element to realize the control of sine wave cycle, and the precision is low, which is suitable for low frequency occasions.

( 2 ) LC oscillation circuit mainly uses inductor and capacitor for frequency selection, which is suitable for high frequency applications, and the accuracy is not high.

( 3 ) Quartz crystal oscillator is mainly controlled by quartz crystal for frequency selection, with high precision and wide application.

2. The circuit composed of sinusoidal oscillation circuit is based on two conditions : phase conditions and amplitude conditions, and the corresponding circuits generally include amplification, frequency selection, positive feedback, negative feedback, clipping and other components.

( 1 ) Most of the amplification is mainly used to supplement the signal energy, compensate for various losses in the circuit, so that the signal can be continuously and stably output.

( 2 ) The frequency selection part is mainly used to filter out the unnecessary frequency components, so that the output is closer to the sine wave of the expected frequency.

( 3 ) The positive feedback part is the key part of the oscillation circuit, which corresponds to the phase condition and has no positive feedback, and the oscillation circuit can not play the vibration.

( 4 ) The negative feedback part is used to guarantee the stability of the circuit.

( 5 ) the amplitude limiting part enables the output sine wave amplitude to meet the expected requirements.

If you want to know more, our website has product specifications for the oscillators, you can go to Allicdata Electronics Limited to get more information.

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