A temperature detection circuit
A temperature detection circuit and circuit technology, which is applied in the directions of thermometers, measuring devices, and heat measurement, can solve the problems of increasing the complexity of the temperature detection circuit, and achieve the effect of simple structure and easy implementation.
Inactive Publication Date: 2015-11-25
ARKMICRO TECH
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Problems solved by technology
Therefore, the reference voltage source included in the temperature detection circuit increases the complexity of the temperature detection circuit, and for integrated circuits with strict space requirements, it is not conducive to the reduction of the chip containing the integrated circuit
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[0031] An embodiment of the present invention provides a temperature detection circuit. Each will be described in detail below.
[0032] Such as figure 1 As shown, an example diagram of a temperature detection circuit provided by an embodiment of the present invention. The temperature detection circuit includes: a first circuit 101 for generating a first voltage and a second voltage; wherein, the first voltage and the second voltage are respectively base-emitter voltages of different triodes in the first circuit 101 ; used to amplify and subtract the first voltage and the second voltage output by the first circuit according to the relationship that the difference between the first voltage and the second voltage is proportional to the absolute temperature, so that the operation circuit 102 outputs The voltage value corresponds to the absolute temperature value. The voltage value mentioned here corresponds to the absolute temperature value, which can be specifically: the volt...
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The embodiment of the invention discloses a temperature detection circuit. The circuit comprises a first circuit and an operational circuit, wherein the first circuit is used for generating a first voltage and a second voltage, the first voltage and the second voltage are respectively base-emitter voltages of different transistors in the first circuit; the operational circuit is used for operating the first voltage and the second voltage which are output by the first circuit according to a proportional relationship between the difference value of the first voltage and the second voltage and an absolute temperature value, so that the voltage value output by the operational circuit is equal to the absolute temperature value. In the technical scheme in the invention, by utilizing the operational circuit which is used for operating the first voltage and the second voltage and outputting the voltage corresponding to the absolute temperature value according to the characteristic that the difference value of the base-emitter voltages (VBE) between the transistors is proportionate to the absolute temperature value, the temperature detection circuit does not need an individual reference voltage source. Therefore, the temperature detection circuit has simple structure and is easy to realize.
Description
technical field [0001] The invention relates to the technical field of semiconductor integrated circuits, in particular to a temperature detection circuit. Background technique [0002] Electronic components have a certain loss during work, and most of the loss is turned into heat. The heat loss of high-power devices is very large. If reasonable heat dissipation measures are not taken, the temperature of the device may exceed the allowable temperature limit, resulting in damage to the device. The power density of power integrated circuits is getting higher and higher, and the heating problem is getting more and more serious, which urgently needs to be solved by designers as soon as possible. [0003] In the prior art, a temperature detection circuit is added to the integrated circuit, and the temperature is directly read in digital form through the temperature detection circuit. When the temperature exceeds the temperature limit value of the integrated circuit, the operatio...
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IPC IPC(8): G01K7/01
Inventor 程涛刘敬波胡江鸣石岭
Owner ARKMICRO TECH