Tuning circuits are electronic circuits designed to select specific frequencies from a range of signals. They are commonly used in devices like radios and televisions to isolate the desired station or channel. By adjusting components such as capacitors and inductors, these circuits can "tune in" to a particular frequency while filtering out others. These circuits typically consist of a resonant circuit, which can be either series or parallel. The resonant frequency is determined by the values of the components used, allowing for precise control over the frequency selection. Tuning circuits are essential for clear signal reception in communication systems and audio devices.