| 摘要 |
<p>A switch-mode power converter that powers the fan or blower unit in a communication system is used to suppress the audio band noise, thereby eliminating any need for additional passive or active filters used in the prior art. The frequency response of a switch-mode DC/DC converter is set by a control loop. By modifying the feedback amplifier compensation network in the control loop such that the frequency control loop bandwidth of the converter is substantially less than the AC load of the fans or blowers, the invention eliminates the need for additional filtering beyond that inherent in the power converter.</p> |
