Patent ID: 8222950
Filing Date: 2012-07-17
Classification: G06F

Abstract:
1. A power supply circuit, comprising: a PWM controller which is capable of providing pulse signals to a CPU; a temperature feedback circuit is coupled to the PWM controller; and a temperature sensor coupled to the temperature feedback circuit; the temperature sensor is located adjacent the CPU and capable of detecting a temperature of the CPU, wherein the temperature sensor comprises a first end and a second end, the temperature feedback circuit comprises a first resistor, a RC circuit which comprises a RC resistor and a RC capacitor, and a sixth resistor, the PWM controller comprises a first controller pin and a second controller pin, the first end of the temperature sensor is serially connected to the first resistor, the RC resistor, and the first controller pin, and the second end of the temperature sensor is connected to the second controller pin via the sixth resistor; wherein the PWM controller is capable of adjusting the pulse signals depending on the temperature sensor.