A frequency divider, also called a clock divider or scaler or prescaler, is a circuit that takes an input signal of a frequency, ${\displaystyle f_{in}}$, and generates an output signal of a frequency:

${\displaystyle f_{out}={\frac {f_{in}}{n}}}$

where ${\displaystyle n}$ is an integer. Phase-locked loop frequency synthesizers make use of frequency dividers to generate a frequency that is a multiple of a reference frequency. Frequency dividers can be implemented for both analog and digital applications.