Patent ID: 8297834
Filing Date: 2012-10-30
Classification: G01K

Abstract:
1. An indication apparatus for indicating temperature status of a heat dissipating portion on a motherboard, comprising: a detection module capable of detecting temperatures of the heat dissipating portion, and converting the detected temperatures to voltage signals; the detection module comprises a thermal resistor and a first resistor; a first terminal of the thermal resistor is capable of receiving a first voltage; a second terminal of the thermal resistor is grounded via the first resistor; a comparison module capable of receiving the voltage signals, comparing the voltage signals with a first reference voltage, and outputting control signals according to a comparison result; the comparison module comprises a first comparator; a non-inverting input terminal of the first comparator is capable of receiving the first reference voltage; an inverting input terminal of the first comparator is electrically coupled to a connection point between the thermal resistor and the first resistor; a switch module capable of receiving the control signals, and turning on or off according to the control signals; the switch module comprises a first transistor, a second transistor, and a third transistor; each bases of the first transistor and the second transistor is electrically coupled to an output terminal of the first comparator; each of an emitter of the first transistor and a collector of the second transistor is capable of receiving the first voltage; an emitter of the second transistor is grounded; the collector of the second transistor is electrically coupled to a base of the third transistor; an emitter of the third transistor is capable of receiving the first voltage; and an indication module capable of indicating temperature states of the heat dissipating portion when the switch module turns on or off.