What Is a Sine Wave Generator?

Sinusoidal signal generator is a kind of signal generating device and signal source that is widely used in the design of electronic circuits, automatic control systems and instrument measurement and calibration. It belongs to digital signal generators. The sinusoidal signal is a common signal source with the most single frequency component. Any complex signal (such as a sound signal) can be decomposed into a superposition of many sinusoidal signals with different frequencies and amplitudes by Fourier transform. Its application field is very widely.

Sine

Sinusoidal signals are mainly used to measure the frequency characteristics, nonlinear distortion, gain, and sensitivity of circuits and systems. Divided into low frequency signal generator, high frequency signal generator and microwave signal generator according to frequency coverage; according to adjustable range and stability of output level, it is divided into simple signal generator (ie signal source) and standard signal generator (output Power can be accurately attenuated below -100 dBmW) and power signal generator (output power reaches more than tens of milliwatts); according to the way of frequency change, it is divided into tuned signal generator, frequency sweep signal generator, and program control Signal generator and frequency synthesis signal generator.

The sine signal generator is mainly composed of two parts: a sine wave signal generator and generating amplitude modulation, frequency modulation, and keying signals. The sine wave signal generator uses the direct digital frequency synthesis dds technology to implement a sine signal lookup table and address scan on cpld, and a sine signal can be obtained by d / a output. With high frequency stability and wide frequency range, it is easy to achieve frequency step of 100 Hz. The all-digital structure is easy to integrate and the output phase is continuous.

Simple sinusoidal signal generator circuit with small distortion: This circuit can meet the requirements of the frequency range of 300hz ~ 15hz and the distortion coefficient k <0.1% (typically 0.03%). The value of the oscillator frequency is determined by the values of r and c. The potentiometer can adjust the output signal amplitude (about 1.5v). The amount of feedback and the distortion coefficient can be adjusted by the potentiometer rp2.

Sine signal generators are widely used in signal processing systems in the fields of electronic technology testing, automatic control systems and communications, instrumentation, control and other scientific research fields such as machinery, electroacoustics, underwater acoustics, and biology.