High-precision negative-voltage sectional compensation band gap reference voltage source circuit

A reference voltage source and reference voltage output technology, which is applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve the problems of not being able to meet the requirements and not being able to compensate the reference voltage

Inactive Publication Date: 2015-09-16
NORTH-CHINA INTEGRATED CIRCUIT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the temperature coefficient of the output voltage of this traditional bandgap reference source is usually limited to 20-100ppm/℃
This is due to V BE The negative temperature coefficient has a nonlinearity, ΔV BE The linear positive temperature characteristic can only offset the first-order negative temperature coefficien...

Method used

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  • High-precision negative-voltage sectional compensation band gap reference voltage source circuit
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  • High-precision negative-voltage sectional compensation band gap reference voltage source circuit

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Embodiment Construction

[0027] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, 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.

[0028] In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. By analogy, the present invention is therefore not limited to the specific examples disclosed below.

[0029] like Figure 2-...

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Abstract

The invention discloses a high-precision negative-voltage sectional compensation band gap reference voltage source circuit, and relates to the technical field of integrated circuit voltage regulators. The voltage source circuit comprises a starting circuit, an auxiliary reference current generation circuit with exponent compensation, a first sectional compensation current generation circuit, a second sectional compensation current generation circuit and a negative-pressure sectional curvature compensation band gap reference voltage output circuit. The voltage source circuit conducts curvature compensation on a bipolar two-tube negative-pressure band gap reference circuit through exponent compensation and twice sectional compensation of different high-temperature segments, high-precision negative-voltage reference voltage output is guaranteed, and the power supply rejection ratio of a negative reference source is increased through a negative feedback loop.

Description

technical field [0001] The invention relates to the technical field of integrated circuit regulators, in particular to a high-precision negative pressure segment compensation bandgap reference voltage source circuit. Background technique [0002] The reference voltage source circuit is one of the core parts of the integrated voltage regulator, and its accuracy and stability are directly related to the overall performance of the entire system. The bandgap reference source has significant advantages: it is fully compatible with the standard CMOS process; it can work at low power supply voltage; its temperature drift, noise and power supply rejection ratio performance can meet the requirements of most systems. Therefore, the bandgap reference source has been extensively studied. Today, reference voltage sources are widely used in AD / DA converters, power chips, phase-locked loops (PLL, Phase Locked Loop), high-precision voltmeters, ammeters, ohmmeters, and other fields. [000...

Claims

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Application Information

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IPC IPC(8): G05F1/56
Inventor 赵永瑞刘倩卢东旭崔玉旺师翔
Owner NORTH-CHINA INTEGRATED CIRCUIT CO LTD
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