Patent ID: 11875773
Assignee: BRITISH CAYMAN ISLANDS INTELLIGO TECHNOLOGY INC.
Field: Other consumer goods (Other fields)
Classification: CPC G | IPC G

Claim 0:
1. A fan control system applied to N fans inside a computer system, comprising:
a main microphone for generating a main audio signal;
a control circuitry coupled to the main microphone and configured to calculate a basic frequency value according to a temperature inside the computer system, and continuously update a parameter by a known optimization algorithm according to the main audio signal;
a wave generation circuitry for generating N square waves according to the basic frequency value and the parameter; and
a number N of fan controllers coupled between the wave generation circuitry and the N fans for forming and transmitting N modulation signals to the N fans according to the N square waves and N tachometric signals from the N fans;
wherein the parameter is one of a frequency variation and a set of phase differences;
wherein the N square waves have the same frequency; and
wherein the known optimization algorithm is Gradient Descent.