Band-gap 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 good effects of improving temperature coefficient and temperature characteristics

Active Publication Date: 2017-02-15
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • 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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  • Band-gap reference circuit with high-order temperature compensation
  • Band-gap reference circuit with high-order temperature compensation
  • Band-gap 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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PUM

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Abstract

The invention belongs to the technical field of electronic circuits and particularly relates to a band-gap reference circuit with high-order temperature compensation. The band-gap reference circuit with the high-order temperature compensation comprises the band-gap reference circuit and a voltage regulation circuit. According to the band-gap reference circuit with the high-order temperature compensation, with addition of nonlinear temperature compensation and a feedback regulation circuit, a temperature coefficient is better improved; reference output voltage can be more stable through negative feedback action of the voltage regulation circuit, and thus band-gap reference voltage with high-order temperature compensation is obtained; and compared with the traditional band-gap reference voltage, the band-gap reference voltage with the high-order temperature compensation has lower temperature coefficient and is more accurate and stable in the reference output voltage. The band-gap reference circuit with the high-order temperature compensation can be applied to various analog integrated circuits including oscillators, data converters and the like.

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 Applications(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
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