Delay circuit, fan assembly, and electronic device using the delay circuit

A fan assembly used in an electronically device, the fan assembly comprising:

• a fan;
• and
• a delay circuit, the delay circuit comprising:
• a signal generation circuit receiving a driving signal from the electronic device, and generating a control signal according to the driving signal;
• a first switch electronically connected to the signal generation circuit to receive the control signal;
• a delay microchip configured to delay the control signal;
• and
• a second switch electronically connected between the delay microchip and the fan;
• wherein manipulation of the first switch causes the signal generation circuit to be electronically connected to the fan via the first switch, and the control signal is transmitted to the fan to activate the fan;
• and
• wherein manipulation of the first switch causes the signal generation circuit to be electronically connected to the delay microchip, the delay microchip receives the control signal and outputs a delayed control signal after a predetermined delay time, and the delayed control signal is transmitted to the fan via the second switch to activate the fan.

An electronic device, comprising:

• a motherboard outputting a driving signal;
• a fan;
• and
• a delay circuit, the delay circuit comprising:
• a signal generation circuit receiving a driving signal from the motherboard, and generating a control signal according to the driving signal;
• a first switch electronically connected to the signal generation circuit to receive the control signal;
• a delay microchip configured to delay the control signal;
• and
• a second switch electronically connected between the delay microchip and the fan;
• wherein manipulation of the first switch causes the signal generation circuit to be electronically connected to the fan via the first switch, and the control signal is transmitted to the fan to activate the fan;
• and
• wherein manipulation of the first switch causes the signal generation circuit to be electronically connected to the delay microchip, the delay microchip receives the control signal and outputs a delayed control signal after a predetermined delay time, and the delayed control signal is transmitted to the fan via the second switch to activate the fan.