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A Bandgap Reference Circuit with High-order Temperature Compensation

A high-order temperature compensation and reference circuit technology, applied in the direction of adjusting electrical variables, control/regulating systems, instruments, etc., to achieve the effect of good temperature characteristics and improved temperature coefficient

Active Publication Date: 2017-12-01
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to thermal voltage V T The temperature coefficient is a fixed value, while V BE The temperature coefficient itself will change with the change of temperature, so the reference voltage obtained by this method can only achieve first-order temperature compensation

Method used

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  • A Bandgap Reference Circuit with High-order Temperature Compensation
  • A Bandgap Reference Circuit with High-order Temperature Compensation
  • A Bandgap Reference Circuit with High-order Temperature Compensation

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Embodiment Construction

[0019] Below in conjunction with accompanying drawing and embodiment technical scheme of the present invention is described in detail as follows:

[0020] A high-order temperature-compensated bandgap reference circuit includes a high-order bandgap reference circuit and a voltage adjustment circuit; the high-order bandgap reference circuit is used to generate a bandgap voltage with high-order temperature compensation, and the voltage adjustment circuit Negative feedback regulation can make the reference output voltage more stable. Compared with the traditional bandgap reference circuit, this circuit is characterized by adding a non-linear temperature compensation and voltage adjustment circuit, and controls the turn-on and turn-off of the entire circuit module through two enable control signals UVLO and UVP. Linear includes exponential curvature compensation and second order compensation. Such as figure 2 The right part is a bandgap reference structure. Compared with the tra...

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Abstract

The invention belongs to the technical field of electronic circuits, in particular to a high-order temperature-compensated bandgap reference circuit. It includes a bandgap reference circuit and a voltage adjustment circuit; the present invention improves the temperature coefficient better by adding a nonlinear temperature compensation and feedback adjustment circuit, and can make the reference output voltage more stable through the negative feedback of the voltage adjustment circuit, and then A bandgap reference voltage with high-order temperature compensation is obtained, which has a lower temperature coefficient than the traditional bandgap reference voltage, and the reference output voltage is more accurate and stable. The circuit can be applied to various analog integrated circuits such as oscillators and data converters.

Description

technical field [0001] The invention belongs to the field of integrated circuits, in particular to a high-order temperature-compensated bandgap reference circuit. Background technique [0002] The bandgap reference circuit is used to generate a temperature-independent reference voltage. ) and other fields. The high-performance bandgap reference circuit is one of the key technologies in design, and its precision directly determines the precision of the whole system. [0003] Traditional first-order temperature-compensated bandgap reference circuits such as figure 1 As shown, the basic principle is to use the thermal voltage V with a positive temperature coefficient T with a transistor base-emitter voltage V with a negative temperature coefficient BE The weighted summation results in a reference voltage with zero temperature coefficient. Due to thermal voltage V T The temperature coefficient is a fixed value, while V BE The temperature coefficient itself will change wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/567
CPCG05F1/567
Inventor 乔明丁立文卢璐张波
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA