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High-order compensation band gap reference voltage source

A reference voltage source and high-order compensation technology, which is applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve the problems of few applicable processes, high process requirements, and small application range, so as to improve the temperature coefficient and increase the circuit The effect of a wide range of areas and applications

Inactive Publication Date: 2010-09-15
SHANGHAI RES INST OF MICROELECTRONICS SHRIME PEKING UNIV
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0020] The purpose of the present invention is to provide a high-order compensated bandgap reference voltage source to overcome the limitations of existing high-order compensated bandgap reference voltage sources such as high technological requirements, few applicable processes, small applicable range, and excessive area.

Method used

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  • High-order compensation band gap reference voltage source
  • High-order compensation band gap reference voltage source
  • High-order compensation band gap reference voltage source

Examples

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Embodiment Construction

[0028] Such as figure 2As shown, the structure of this embodiment is based on the traditional first-order compensation bandgap reference circuit, and a grounding resistor R3 is added, the third transistor Q3 is grounded through the grounding resistor R3, and a high-order compensation circuit 31 is added, which includes Two high-order compensation branches, one of which is composed of the fifth PMOS transistor P5, the first NMOS transistor N1 and the first compensation resistor R4, and the other branch is composed of the sixth PMOS transistor P6, the second NMOS transistor N2 and the second compensation resistor The current input terminal E of the first compensation resistor R4 is connected to the gate of the first NMOS transistor N1 (that is, the state control terminal of the MOS structure composed of the fifth PMOS transistor P5 and the first NMOS transistor N1), and its current The output terminal is connected to the current input terminal D of the second compensation resis...

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PUM

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Abstract

The invention discloses a high-order compensation band gap reference voltage source comprising an output branch for outputting a reference voltage. The high-order compensation band gap reference voltage source is characterized by also comprising an earthed resistance structure playing a role of a resistor and a high-order compensation circuit, wherein the high-order compensation circuit and the output branch are connected in parallel and are respectively connected to a current input end of the earthed resistor structure; a current output end of the earthed resistor structure is earthed; the high-order compensation circuit is used for inputting current to the current input end of the earthed resistor when the current in the output branch is reduced caused by the temperature rise; the structure is applicable for various processes without depending on an accurate process and has wide application range; and besides, the circuit area cannot be substantially increased. In addition, the temperature coefficient of the high-order compensation band gap reference voltage source is far superior to that of the traditional high-order compensation band gap reference voltage source.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to a high-order compensation bandgap reference voltage source. Background technique [0002] The bandgap reference voltage source refers to a voltage source that can serve as a reference in the circuit. It requires high precision, and its output reference voltage should change as little as possible with the change of the external temperature. Reference voltage sources are widely used, such as data converters (including analog-to-digital converters and digital-to-analog converters), sensors, power management controllers, and various high-precision measuring instruments. Its accuracy directly affects the performance of each module of the circuit and plays a very important role. [0003] For the bandgap reference voltage source, an important index to investigate the performance is the temperature coefficient (TC, Temperature Coefficient), the unit of the temperature coefficient is P...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F3/30
Inventor 张耀国何媛沈立程玉华
Owner SHANGHAI RES INST OF MICROELECTRONICS SHRIME PEKING UNIV
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