| 摘要 |
A computer system fan circuit having a primary power voltage source and a standby power voltage source. A fan control circuit is coupled to the primary power voltage source, the standby power voltage source and a power supply fan. In this way, power may be provided to the power supply fan when a power supply is in either a fill power mode or a standby power mode. In another embodiment, a ripple filter circuit is coupled to a voltage source and a system fan. The ripple filter circuit may be, for example, an active suppression current limiter circuit that limits the current drawn by one or more system fans.
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