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　　 An oscillator (English: oscillator) is an energy conversion device that converts DC power into AC power with a certain frequency. The circuit that constitutes it is called an oscillating circuit.
A low-frequency oscillator (LFO) is an oscillator that generates an AC signal with a frequency between 0.1 Hz and 10 Hz. This term is often used in audio synthesis to distinguish other audio oscillators.
The oscillator [1] can be mainly divided into two types: a harmonic oscillator (a harmonic oscillator) and a relaxation oscillator (relaxation oscillator).
An electronic circuit or device capable of converting direct current into an output of an alternating current signal having a certain frequency. There are many types, according to the oscillation excitation mode, it can be divided into self-excited oscillator and other oscillator; according to the circuit structure, it can be divided into RC oscillator, inductor-capacitor oscillator, crystal oscillator, tuning fork oscillator, etc. It is an oscillator such as a sine wave, a square wave, or a sawtooth wave. Widely used in electronics industry, medical, scientific research and other aspects. It is mainly applied to the shaking culture of various liquid and solid compounds such as biology, biochemistry, cells and bacteria in scientific research departments such as universities, medical, petrochemical, health and epidemic prevention, and environmental monitoring.
The self-excited multivibrator is also called an unsteady circuit. The collectors of the two tubes each have a capacitor connected to the base of the other tube to form an AC coupling function, forming a positive feedback circuit. One tube is turned on first and the other tube is turned off. At this time, the collector of the conducting tube has an output, and the capacitance of the collector couples the pulse signal to the base of the other tube to turn on the other tube. When the original conduction tube is cut off, the two tubes are turned on and off in turn, and an oscillating current is generated.
Since the parameters of the device are not completely identical, the state of the two transistors changes at the moment of power-on. This change is caused by the positive feedback, which leads to a transient state. Another triode during the transient steady state. After the capacitor is gradually charged, it is turned on or off, and the state is turned over to reach another temporary steady state.
Sine wave oscillator
An oscillator capable of outputting a sine wave is called a sine wave oscillator.
Sine wave oscillators mainly include LC oscillator RC oscillators.
The most basic part of the oscillator
1 triode amplifier; (from energy control)
2 positive feedback network; (feed back part of the output signal to the input)
3 frequency selection network; (to select the required oscillation frequency, so that the oscillator can oscillate at a single frequency, thereby obtaining the required waveform vibration
Oscillator definition
The oscillator is simply a frequency source and is typically used in phase-locked loops. In detail, it is a device that can convert DC power into AC power without external signal excitation. Generally divided into positive feedback and negative resistance type. The so-called "oscillation", its meaning implies communication, the oscillator contains a process and function that never oscillates to oscillate. Such a device can be converted from DC power to AC power, and such a device can be called an "oscillator."
Oscillator introduction