Electromagnetic interference reducing circuit

An electromagnetic interference reducing circuit of a motor, wherein the motor is connected to a motor driver circuit, and the motor driver circuit includes a plurality of switch components connected to the motor, the electromagnetic interference reducing circuit comprising:

• a first oscillator configured to generate a first oscillating signal;
• a first random number generator configured to generate a plurality of first random number signals each having a plurality of triangular waves, wherein each of the triangular waves has a plurality of steps, and the first random number generator is configured to generate a plurality of first random numbers;
• wherein each time when a first clock signal reaches a reference level, the first random number generator modulates one of the triangular waves of each of the first random number signals according to one of the first random numbers;
• wherein the first random number generator repeatedly counts, repeatedly removes, or does not count time of the steps of each of the triangular waves of each of the first random number signals according to one of the first random numbers, such that each one of periods of the first random number signal is adjusted to be not equal to a next one of the periods of the first random number signal, and a number of the steps of each of the triangular waves that are repeatedly counted, repeatedly removed or not counted depends on the one first random number of each of the triangular waves;
• and
• a motor controller circuit connected to the first oscillator and the first random number generator, configured to receive the first oscillating signal from the first oscillator and output the first clock signal to the first random number generator, and configured to control the switch components respectively according to the first random number signals based on the first oscillating signal.