Low-temperature-drift band-gap reference voltage source based on high-order temperature curvature compensation
A reference voltage source and curvature compensation technology, applied in the field of bipolar semiconductor integrated circuits and bipolar analog integrated circuits, can solve the problems of complex compensation circuits, inability to obtain high precision with temperature compensation technology, low temperature drift, etc., and achieve power supply suppression The effect of large ratio, simple structure and excellent performance
Active Publication Date: 2022-04-01
GUIZHOU ZHENHUA FENGGUANG SEMICON
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Problems solved by technology
[0005] The purpose of the present invention is to solve the problem that the existing bandgap reference voltage source temperature compensation technology cannot obtain high precision and low temperature drift (less than 10ppm / °C), and the compensation circuit more complex issues
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[0028] combined with Figure 3-Figure 5 , an embodiment of a low-temperature drift bandgap reference voltage source based on high-order temperature curvature compensation described in the present invention is described in detail as follows:
[0029] like image 3 Shown, by the reference voltage generation circuit A, high-order temperature curvature compensation circuit B and feedback circuit C. The reference voltage generation circuit A generates the bandgap voltage V BG ; The bias module A1 provides bias current for the entire reference circuit; the operational amplifier A2 makes the two points in the internal loop of the reference voltage generation circuit A that need to have the same voltage stably clamped at the same voltage; the high-order temperature curvature The compensation circuit B generates a high-order positive temperature coefficient current and a high-order negative temperature coefficient current, and performs curvature compensation on the bandgap reference ...
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The invention discloses a low-temperature-drift band-gap reference voltage source based on high-order temperature curvature compensation, and belongs to the field of bipolar semiconductor integrated circuits. Comprising a reference voltage generation circuit A, a high-order temperature curvature compensation circuit B and a feedback circuit C, the reference voltage generation circuit A is connected with the high-order temperature curvature compensation circuit B, and the high-order temperature curvature compensation circuit B is connected with the feedback circuit C; the high-order temperature curvature compensation circuit B comprises a low-temperature compensation circuit B1 and a high-temperature compensation circuit B2, the low-temperature compensation circuit B1 generates high-order negative temperature coefficient current, the high-temperature compensation circuit B2 generates high-order positive temperature coefficient current, and curvature compensation is carried out on the band-gap reference voltage in a low-temperature section and a high-temperature section respectively. Therefore, the reference voltage with higher precision and lower temperature drift can be stably output in a wider temperature range. The problem that high-precision and low-temperature-drift band-gap reference voltage cannot be obtained through an existing band-gap reference voltage temperature compensation technology is solved. The reference power supply is widely applied to the high-precision and low-temperature-drift reference power supply field.
Description
technical field [0001] The invention belongs to the field of bipolar semiconductor integrated circuits, and further relates to the field of bipolar analog integrated circuits. Specifically, it relates to a low-temperature drift bandgap reference voltage source based on high-order temperature curvature compensation. Background technique [0002] In analog integrated circuits, the reference voltage source is a very important module, which can provide a high-precision, high-stability reference voltage that basically does not vary with temperature and power supply voltage, and is widely used in digital-to-analog converters, analog-to-digital converters, linear In various high-precision systems such as voltage regulators and switching regulators, sensors, and power products, the accuracy directly determines the overall performance of the system and plays an extremely important role. [0003] With the continuous development of mobile communication and other communication technolog...
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Inventor 唐毓尚叶美耀李雪袁兴林陈敏华蒋冰桃杨阳杨威
Owner GUIZHOU ZHENHUA FENGGUANG SEMICON