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Self-compensation band-gap reference source structure based on curvature function and application of self-compensation band-gap reference source structure

A self-compensating, reference source technology, applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve the problems of large influence of process deviation, complex structure, difficult to achieve simulation of temperature coefficient, etc., to reduce process error, Lower temperature coefficient and simple structure

Active Publication Date: 2021-11-30
XI AN JIAOTONG UNIV
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  • Application Information

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Problems solved by technology

The segmented temperature compensation technology can reduce the temperature coefficient to a very low level, but the structure is the most complex and the process deviation has the greatest influence, so the actual temperature coefficient of the test is difficult to reach the simulation level

Method used

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  • Self-compensation band-gap reference source structure based on curvature function and application of self-compensation band-gap reference source structure
  • Self-compensation band-gap reference source structure based on curvature function and application of self-compensation band-gap reference source structure
  • Self-compensation band-gap reference source structure based on curvature function and application of self-compensation band-gap reference source structure

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Embodiment Construction

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0044] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediar...

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Abstract

The invention discloses a self-compensation band-gap reference source structure based on a curvature function and application of the self-compensation band-gap reference source structure. The self-compensation band-gap reference source structure comprises a plurality of bipolar transistors, wherein one ends of the bipolar transistors are in common ground connection, the other ends of the bipolar transistors are respectively connected with one end of a resistor R1 through corresponding resistors, the other end of the resistor R1 is connected with an operational amplifier through a field effect transistor, and the temperature coefficient of a reference voltage VREF of the band-gap reference source is reduced by utilizing the nonlinearity of the current gain beta of the bipolar transistor. By using the nonlinearity of the current gain beta of the BJT, the temperature coefficient of the reference voltage is greatly reduced. Meanwhile, the band-gap reference source adopts a self-compensation structure, an additional temperature compensation circuit is not needed, temperature compensation is directly achieved in a core circuit of the band-gap reference source, the structure is simple, and influences caused by process errors are reduced.

Description

technical field [0001] The invention belongs to the technical field of semiconductor integrated circuits, and in particular relates to a curvature function-based self-compensating bandgap reference source structure and its application. Background technique [0002] Bandgap reference sources are widely used in various analog, digital, and analog-to-digital hybrid circuits to provide high-precision voltage bias. The temperature coefficient is the core indicator of the bandgap reference source. The smaller the output voltage of the bandgap reference source varies with temperature, the lower the temperature coefficient is. [0003] The basic principle of realizing a low temperature coefficient bandgap reference source is to generate a voltage with an approximate zero temperature coefficient through the superposition of a voltage with a negative temperature coefficient and a voltage with a positive temperature coefficient. The base-emitter voltage V of a bipolar transistor in a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/567
CPCG05F1/567
Inventor 耿莉董力吕程沈云虓
Owner XI AN JIAOTONG UNIV
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