Direct digital synthesis (DDS) is a technique for generating precise, high-frequency electrical signals using digital circuits. It is commonly used in a variety of applications, including telecommunications, test and measurement equipment, and radio frequency (RF) synthesis.
DDS works by using a digital-to-analog converter (DAC) to convert a digital signal into an analog signal. This analog signal is then used to modulate a high-frequency carrier signal, producing a precise, high-frequency output signal. DDS is preferred over other methods of generating high-frequency signals, such as using a voltage-controlled oscillator, because it provides better accuracy and stability. Additionally, DDS can be easily integrated into digital circuits, allowing for seamless generation of high-frequency signals.