Explain the circuit composition and principle of sine wave resonant circuits in English

"A sine wave oscillation circuit consists of four parts, the amplification circuit. Feedback network. Frequency selection network and amplitude stabilization.

1) The amplification circuit has a certain voltage amplification factor. Its function is to amplify the signal of a certain frequency selected. According to the needs of the circuit, a single-stage amplification circuit or a multi-stage amplification circuit can be used.

2) The feedback network is the circuit through which the feedback signal passes, and its function is to feed the output signal back to the input terminal and introduce self-excitation.

It consists of four parts: an amplification circuit, a frequency selection network, a feedback network and an amplitude stabilization circuit. There are two commonly used sine wave oscillators: capacitive feedback oscillators and inductive feedback oscillators. The latter has a small output power and a lower frequency; The former can output high power and has a higher frequency.

1. The amplification circuit --- establish and maintain oscillation.

2. The positive feedback network --- and the amplification circuit jointly meet the oscillation conditions.

3. Frequency selection network --- to select a certain frequency for oscillation.

4. The amplitude stabilization link --- make the amplitude of the waveform stable, and the shape of the waveform is good.

A sine wave oscillation circuit is a circuit used to generate a sine wave signal of a certain frequency and amplitude, and there is only a DC source and no external signal source in the circuit. It has a wide frequency range, from a few tenths of a Hz to more than a few hundred MHz, and its output power can range from a few MW to tens of MW.

Sine wave oscillators are widely used in a variety of electronic devices. In such applications, the oscillator is required to be accurate and stable in terms of oscillation frequency and amplitude.

Another type of use of sine wave oscillators is as a sinusoidal alternating energy source in high-frequency heating devices and medical electrotherapy instruments. In this type of application, the requirements for the oscillator are mainly to generate a sufficiently large sinusoidal alternating power with high efficiency, while the accuracy and stability of the oscillation frequency are generally not demanding.

Sine wave oscillation circuit: amplification circuit and positive feedback network, frequency selection network, amplitude stabilization circuit. 2113

In order to generate a sine wave, positive feedback must be added to the amplification circuit, so the amplification circuit and the positive 5261 feedback network are the most important parts of the oscillation circuit. However, such a two-part oscillator with a 4102 generally does not get a sine wave, which is due to the fact that it is very difficult to control the amount of positive feedback in 1653.

If the positive feedback is large, the amplitude increases, the output amplitude becomes larger and larger, and finally the nonlinear obligate limit of the transistor will inevitably produce nonlinear distortion. On the contrary, if the positive feedback is insufficient, the amplitude will be reduced, and the vibration may be stopped, for which the oscillation circuit must have a stable amplitude circuit.

Briefly describe the components of the sine wave oscillation circuit and its functionsAs follows:

"A sine wave oscillation circuit consists of four parts, the amplification circuit. Feedback network. Frequency selection network and amplitude stabilization.

1) The amplification circuit has a certain voltage amplification factor, and its function is to amplify the signal of a certain frequency selected. According to the needs of the circuit, a single-stage amplification circuit or a multi-stage amplification circuit can be used.

2) The feedback network is the circuit through which the feedback signal passes, and its function is to feed back the output signal to the input terminal, and introduce the positive feedback required for self-oscillation.

3) The frequency selection network has the function of noisy frequency selection, and its function is to select the signal of the specified frequency so that the sine wave oscillation circuit can achieve a single frequency oscillation. The frequency selection network is divided into LC frequency selection network and RC frequency selection network. The sine wave oscillation circuit using the LC frequency selection network is called the LC oscillation circuit; A sine wave oscillation circuit using an RC frequency-selective network is called a RC oscillation circuit.

The frequency-selective network can be set up in the amplification circuit or in the feedback network.

4) The amplitude stabilization link has the effect of stabilizing the amplitude of the output signal, so as to make the circuit achieve equal amplitude oscillation, so the amplitude stabilization link is an important part of the sine wave oscillation circuit.

A detailed explanation of the knowledge of sine wave oscillation circuits

A sine wave oscillator is a circuit that automatically converts direct current into a sinusoidal alternating voltage (current) of a specific frequency and amplitude without the need for input signal control.

The role of a sine wave oscillation circuit

An amplification circuit, when the input is added to the input signal, the output is only available at the output end. If there is no external input signal at the input, there is still a signal output at a certain frequency and amplitude at the output, which is called the self-oscillation of the amplification circuit. An oscillation circuit is a circuit that generates a sine wave output voltage by relying on the self-oscillation of the circuit without an external input signal.

It is widely used in remote control, communication, automatic control, measurement and other equipment, and is also used as a test signal for analog electronic circuits. 3.The working principle of a sine wave oscillation circuit.

A jack-up large feed-through oscillator is a closed loop consisting of an amplifier and a feedback network. It consists of two parts: an amplifier and a feedback network. The amplifier is usually loaded with some kind of frequency selection network (such as an oscillation loop), which is a kind of tuning amplifier; Feedback networks are generally linear networks made up of passive components.

The initiation --- nonlinear process --- steady amplitude oscillation.

The basic components of a sine wave oscillation circuit include an amplification circuit, a frequency selection network, a feedback network and an amplitude stabilization circuit.

1. Amplification circuit: The amplification circuit is used to amplify the amplitude of the input signal of the circuit to meet the feedback conditions.

2. Frequency selection network: The frequency selection network is a bandpass filter, which selects a signal of a specific frequency and transmits it to the feedback network.

3. Feedback network: The feedback network feeds back the output signal to the input end of the amplification circuit to maintain the signal oscillation.

4. Pai Qing key amplitude stabilization circuit: the amplitude stabilization circuit stabilizes the output of the oscillation circuit to ensure that the amplitude of the output signal is stable.

These components work together to produce a stable sine wave oscillating signal. A sine wave oscillation circuit is a type of circuit that produces a stable sine wave output signal, usually consisting of an amplifier, a feedback network, and a filter. It can be used in many applications, such as clock generators, audio processing, wireless communications, and more.

The application of sine wave oscillation circuit is very wide, including but not limited to the following aspects:

1. Signal generator: The sine wave oscillation circuit can be used as a signal generator to produce high stability and accurate frequency.

2. Communication system: sine wave oscillation circuit has important applications in radio communication system and wired communication system, such as local oscillator and clock source in RF transmitter and receiver.

3. Harmony and sound synthesis: The sine wave oscillation circuit can be used to generate various waveforms required in the synthesis of sound and sound, such as triangle waves, sawtooth waves and square waves.

4. Medical equipment: sine wave oscillation circuits can be used in medical equipment, such as signal generators in electrocardiographs and ultrasound probes.

5. Measuring instruments: sine wave oscillation circuits are used in various measuring instruments, such as spectrum splitting analyzers, oscilloscopes, timers, etc.

In short, the sine wave oscillation circuit is one of the most basic and commonly used differential bald circuits in modern electronic technology, and has a wide range of application prospects.

Sinusoid. The generating circuit is composed of an amplification circuit and positive feedback.

It is composed of circuit, frequency selection circuit and amplitude stabilization circuit.

The sine wave generation circuit can generate a sine wave, which is formed by adding positive feedback on the basis of the amplification circuit, and it is the core circuit of various waveform generators and signal sources.

Sine wave generation circuits are also called sine wave oscillation circuits or sine wave oscillators.