Temperature detecting and control circuit

Abstract

This invention provides a temperature test and control circuit including a first bleeder circuit, a second bleeder circuit, a fan rotation speed controller and a comparing circuit, in which, the first bleeder circuit outputs a first voltage, the second bleeder circuit outputs a second voltage and has a temperature-sensing electronic element to test the temperature of a piece of hardware, the comparing circuit receives and compares the two voltages and outputs the result to the fan rotation speed controller, which maintains a first speed when receiving a first control signal and maintains a second rotation speed when receiving a second control signal.

Description

technical field [0001] The present invention relates to a temperature detection and control circuit, and in particular to a temperature detection and control circuit for a computer system. Background technique [0002] Today's computer systems are getting smaller and smaller, but the computing speed is getting faster and faster. Many components will emit heat under high-speed computing, which will reduce the performance of the computer system and even damage the system. Therefore, how to dissipate heat from a computer system is a very important issue. [0003] The display card in the computer system is easy to generate heat because it needs to process high-speed image calculations. In the past, display cards used temperature detection chips. Although detailed temperature measurements can be made, the results are often inaccurate and expensive. In terms of temperature control, in the past, PWM (pulse width modulation) IC was used to control the speed of the fan, but this m...

AI Technical Summary

Problems solved by technology

[0003] The display card in the computer system is easy to generate heat due to the need to process high-speed image calculations

In the past, display cards used temperature detection chips. Although detailed temperature can be measured, the results are generally inaccurate and expensive.

In terms of temperature control, PWM (pulse width modulation) ICs were used to control the speed of fans in the past, but this method is more complicated and expensive

In addition, graphics processing unit (GPU, graphics processing unit) power supply circuits and memory power supply circuits are usually installed on the display card. In the past, Nvidia and ATI display cards would control the input voltage of the graphics processing unit power supply circuit, but did not control the memory power supply circuit. For input voltage control

Images