A frequency divider is an electronic circuit or device used to reduce the frequency
of an input signal to a lower frequency. It is usually implemented by dividing,
counting or logical operation of the input signal. The main working principle of the
frequency divider is to divide the input periodic signal into multiple signals with
longer periods according to a specific frequency divider. For example, a 2-divider
would divide each cycle of the input signal into two cycles, reducing the frequency
by half. Frequency dividers have a wide range of applications in electronic equipment,
such as communication systems, computer clocks, digital signal processing, frequency
synthesizers and test instruments.