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A Three-Junction Bandgap Circuit with Zero Kelvin Reference Voltage

A reference voltage, Kelvin technology, applied in the direction of adjusting electrical variables, instruments, control/regulation systems, etc., can solve the problems of cumbersome adjustment, reduction of reference temperature coefficient, additional items or multiple items will not naturally track nonlinearity, etc. Achieve the effects of eliminating temperature nonlinearity, overcoming bandgap circuits, and eliminating temperature dependence

Active Publication Date: 2022-06-03
CHONGQING BAIRUI INTERNET ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a three-junction bandgap circuit with a zero-Kelvin reference voltage to solve the problem in the prior art that the additional term or multiple terms will not naturally track the nonlinearity in the original reference output, so cumbersome adjustments are required to obtain the reference The problem of lowering the temperature coefficient

Method used

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  • A Three-Junction Bandgap Circuit with Zero Kelvin Reference Voltage
  • A Three-Junction Bandgap Circuit with Zero Kelvin Reference Voltage
  • A Three-Junction Bandgap Circuit with Zero Kelvin Reference Voltage

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Embodiment Construction

[0023] V

[0024]

[0026]

[0028] When V

[0029]

[0031]

[0033]

[0035]

[0037]

[0039]

[0041]

[0042] Let it be equal to 0.

[0045] A voltage generation module, a voltage bootstrap module, and a voltage summation module. Voltage generation module, voltage bootstrap module with

[0046] In a specific embodiment of the present invention, the above-mentioned voltage generation module includes that the voltage generation module includes a

[0050] In this specific example, the voltage generation module includes a diode D1, a diode D2, a diode D3, a bias resistor R1,

[0051] Wherein, the above-mentioned D1, D2, and D3 are all silicon diodes, and the above-mentioned M1, M2, M3, and M4 are all PMOS tubes.

[0053]

[0054]

[0055]

[0058]

[0060] The expressions of the above-mentioned three diode voltages are abbreviated to obtain,

[0061] V

[0062] V

[0063] V

[0065]

[0066]

[0078] Wherein, the above-mentioned M5, M6 and M7 are all PMOS transistors, and M11, M12...

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Abstract

The invention discloses a three-junction bandgap circuit with zero Kelvin reference voltage, which belongs to the technical field of integrated circuits. The circuit includes: a voltage generation module, a voltage bootstrap module and a voltage summation module. The voltage generation module includes three diodes, and the output voltages of the three diodes are obtained by biasing the three diodes with a positive temperature coefficient current and a constant current; the voltage bootstrap module includes three voltage bootstrap units, and the voltage bootstrap units of the three voltage bootstrap units The three input terminals are correspondingly connected to the cathodes of the three diodes in the voltage generation module, and the output voltages of the three diodes are gained to obtain three gain voltages; and the three input terminals of the voltage summation module are correspondingly connected to the three voltage bootstrap units At the output terminal, the reference voltage is obtained by summing the three gain voltages. The invention ideally eliminates all temperature non-linearity, overcomes the disadvantages of the bandgap circuit in the prior art, and eliminates the temperature dependence of the reference output voltage.

Description

A three-junction bandgap circuit with zero Kelvin reference voltage technical field The application relates to the technical field of integrated circuits, in particular to a three-junction bandgap current with zero Kelvin reference voltage road. Background technique Reference voltage source is an important part of analog integrated circuits, in many integrated circuits (such as analog-to-digital converters, Precision and stable voltage references are required in digital-to-analog converters, linear regulators, and switching regulators), regardless of the application In all scenarios, the output voltage of the voltage reference is required to have no change with the voltage, the voltage change is small when the temperature fluctuates, and the output voltage does not change. Can be affected by process. [0003] Aiming at the problem of the influence of temperature fluctuations on the voltage, the prior art usually reduces the temperature curvature or introduces a secon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F3/24
Inventor 苏杰李孙华徐祎喆朱勇
Owner CHONGQING BAIRUI INTERNET ELECTRONICS TECH CO LTD
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