Patent ID: 8354814

Claim:
A fan system circuit module comprising: a stable voltage input terminal for receiving a stable voltage; an operation unit electrically connected to the stable voltage input terminal, after the operation unit is powered on at the stable voltage, the operation unit generating an operation signal; a drive chip coupled with the operation unit for receiving the operation signal to generate a soft-start signal so as to decrease drive current value of the fan, a lock of the fan of the fan system takes place, the drive chip generating a block current signal to decrease block current so as to avoid too great start current of the fan or burnout of the fan; wherein the operation unit includes: a first resistor, a first terminal of the first resistor being coupled with the stable voltage input terminal for receiving the stable voltage; a second resistor, a first terminal of the second resistor being coupled with a second terminal of the first resistor, the coupled terminals of the first and second resistors being both coupled with the drive chip, a second terminal of the second resistor being coupled with a grounding terminal; a first capacitor, a first terminal of the first capacitor and the first terminal of the first resistor being both coupled with the stable voltage input terminal for receiving the stable voltage; and a third resistor, a first terminal of the third resistor being coupled with a second terminal of the first capacitor and also coupled with the coupled terminals of the first and second resistors, a second terminal of the third resistor being coupled with the drive chip.