A temperature sensor with high precision and wide output voltage
A temperature sensor, wide output technology, applied in the sensor field, can solve the problems of large influence of integrated circuit production process and small output voltage signal of temperature sensor, etc., to achieve the effect of improving voltage range, solving interference and improving accuracy
Active Publication Date: 2019-07-26
南京凌鸥创芯电子有限公司
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Problems solved by technology
[0006] The present invention aims at at least solving the problems of small output voltage signal of conventional temperature sensor and large influence of voltage-temperature curve parameters by integrated circuit production process, etc.
Method used
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Embodiment Construction
[0048] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.
[0049] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0050] In the description of the present invention, it should be understood that the terms "first" and "second" are used for description purposes only, and should not be understood as indicating or implying relative importance. The terms "installation", "connection" and "conne...
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The present invention relates to a high-precision wide output voltage temperature sensor. The sensor comprises a temperature signal generation circuit, a temperature signal amplification circuit, a voltage dynamic lifting circuit and an amplifier direct current bias elimination circuit. The temperature signal generation circuit is configured to generate corresponding temperature signals according to the detected temperature; the temperature signal amplification circuit is configured to amplify the temperature signals; the voltage dynamic lifting circuit is configured to improve the amplification factor of the temperature signal amplification circuit to increase the amplification range of the temperature signal; and the amplifier direct current bias elimination circuit is configured to modulate the direct current bias in the amplified temperature signals to high frequency for filtering through a filter provided by an analog-digital converter receiving the temperature signals. The high-precision wide output voltage temperature sensor can improve the voltage range of the output voltage of the temperature sensor, solve the interference of the direct current bias and improve the precision of the temperature sensor.
Description
technical field [0001] The invention relates to the field of sensors, in particular to a temperature sensor with high precision and wide output voltage. Background technique [0002] As a module for sensing the ambient temperature of the chip, the temperature sensor is a widely used component in the integrated circuit. In the prior art, there are not only dedicated temperature sensor chips, but also can be integrated in various types of general-purpose integrated circuits, such as integrated in general-purpose processors (MCU), industrial control chips, and various metering chips. In addition to displaying the current temperature, it can also perform temperature compensation and correction on some parameters such as crystal frequency, clock frequency, metering gain, etc. according to the chip temperature. In the prior art, a typical temperature sensor such as figure 1 shown by a current source I 0 , NPN transistor Q 0 and a buffer op amp A 0 composition, when the curren...
Claims
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IPC IPC(8): G01K7/00
CPCG01K7/00
Inventor 邱翠雯
Owner 南京凌鸥创芯电子有限公司