A SAW (surface acoustic wave) oscillator is an electronic circuit that uses surface acoustic wave technology to generate a range of frequencies. It is used in a variety of different applications, ranging from basic frequency control in consumer electronics to complex signal processing in medical and military systems. The SAW oscillator works by creating oscillations in the form of standing waves on a piezoelectric material. These waves interact with electrical elements to create predictable oscillations. SAW oscillators are typically used to generate frequencies that range from a few kilohertz to several gigahertz, allowing them to be used in a wide range of different applications.