Voltage reference source capable of compensation in full temperature range

A technology of voltage reference source and temperature compensation circuit, which is applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., to achieve the effect of low temperature coefficient and good temperature stability

Inactive Publication Date: 2012-07-04
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems existing in the existing voltage reference source for high-order compensation, and propose a voltage reference source for full temperature range compensation

Method used

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  • Voltage reference source capable of compensation in full temperature range
  • Voltage reference source capable of compensation in full temperature range
  • Voltage reference source capable of compensation in full temperature range

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Embodiment Construction

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] The full temperature range compensation voltage reference source circuit block diagram of the present invention is as follows figure 1 As shown, it includes a start-up circuit, a first-order temperature compensation circuit, a low-temperature high-order compensation circuit, a high-temperature high-order compensation circuit, a negative feedback loop, a proportional superposition output circuit and a current bias circuit. The start-up circuit provides start-up bias voltage for the full temperature range compensation core circuit. When the whole circuit works stably, the start-up circuit stops working and is isolated from the whole circuit. The current bias circuit is mainly for the first-order temperature compensation circuit and negative feedback loop. bias current for proper operation. The negative feedback loop is mainly to...

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Abstract

The invention discloses a voltage reference source capable of compensating in a full-temperature range, which particularly comprises a start-up circuit, a first-order temperature-compensation circuit, a proportional superposition output circuit and a current bias circuit, and is characterized by further comprising a low-temperature high-order compensation circuit, a high-temperature high-order compensation circuit and a negative feedback circuit. The voltage reference source adopts index curvature compensation at the low temperature, adopts piecewise linear curvature compensation at the high temperature, has extremely good temperature stability and extremely low temperature coefficient and can be applied to an analogue integrated circuit, a high-precision digital-to-analogue conversion circuit and a pure digital integrated circuit.

Description

technical field [0001] The invention belongs to the technical field of power supplies, and in particular relates to the design of a voltage reference source. Background technique [0002] In analog, digital-analog hybrid, and even pure digital circuits, high-precision voltage reference sources are required, such as A / D converters, DRAMS, power converters, flash memory control circuits, etc. The stability of the voltage reference directly determines the quality of the circuit performance. The indicators describing the stability of the voltage reference source mainly include: power supply rejection ratio, temperature coefficient, etc. In order to meet the requirements of the circuit to work normally under harsh external temperature environment, the voltage reference must have a very small temperature coefficient, that is, very high temperature stability. [0003] The function of the voltage reference source is to provide reference voltages to other functional modules in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56
Inventor 周泽坤王慧芳傅金马颖乾明鑫张波李肇基
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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