Frequency synthesis is a technique of producing a range of frequencies with crystal-controlled stability. A frequency synthesizer uses phase-locked loop (PLL) to generate output frequencies over a wide range. The typical range is from 1 MHz to 160 MHz.
![Block diagram of a frequency synthesizer Block diagram of a frequency synthesizer](https://i0.wp.com/www.electricalandcontrol.com/wp-content/uploads/2024/02/Frequency-synthesizer.png?resize=677%2C353&ssl=1)