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Correctable low-power consumption voltage reference source with power-on reset function

A technology of voltage reference source and electrical reset, applied in the field of power supply, can solve the problems of high cost and inability to judge the power supply voltage, and achieve the effect of small area, low power consumption and high precision

Inactive Publication Date: 2016-03-23
GUANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional reference voltage correction circuit trims the resistors, so more resistors are needed, but more resistors correspond to a large area, and a large area means high cost
The traditional voltage reference source does not have a power-on reset circuit, so it is impossible to judge whether the current power supply voltage value is a valid working voltage value

Method used

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  • Correctable low-power consumption voltage reference source with power-on reset function
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  • Correctable low-power consumption voltage reference source with power-on reset function

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Embodiment Construction

[0019] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, so as to obtain a better understanding.

[0020] Figure 5 Shown is a circuit connection diagram of a correctable low-power voltage reference source with power-on reset in the present invention, including a power-on reset circuit, a startup circuit, a core circuit of a reference voltage source, a reference voltage correction circuit, and a buffer circuit. The present invention utilizes the characteristics of low current of MOS tubes in the sub-threshold region to design a reference voltage source with power-on reset, correctability, low power consumption, small area and low temperature coefficient.

[0021] image 3 Shown is the reference voltage source core circuit and buffer circuit, transistor M 1 with M 4 , M 3 with M 6 A cascode structure is formed respectively, which effectively improves the power supply rejection ra...

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PUM

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Abstract

The invention discloses a correctable low-power consumption voltage reference source with a power-on reset function. The correctable low-power consumption voltage reference source comprises a power-on reset circuit, a starting circuit, a reference voltage source core circuit, a reference voltage correcting circuit and a buffer circuit. The correctable low-power consumption voltage reference source disclosed by the invention has the power-on reset function, and can detect whether the supply voltage is effective supply voltage or not; the starting circuit has the characteristic of high starting speed; the reference voltage correcting circuit adopts a digital technology to correct MOS tubes and has the characteristics of high convenience in correction, small area and low power consumption; the correctable low-power consumption voltage reference source has the advantages of high precision, low power consumption, small area and wide working voltage range.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to a correctable low power consumption voltage reference source with power-on reset. Background technique [0002] The reference voltage source is the most widely used analog circuit in circuits such as memory, analog-to-digital / digital-to-analog converter, and power management. The reference voltage source is used to provide a stable voltage, and its voltage value does not change with the power supply voltage, temperature, and process. [0003] With the continuous reduction of integrated circuit process size and the rapid development of portable devices, electronic products have higher and higher requirements for power consumption, so low-power reference voltage sources are becoming more and more important. In the integrated circuit manufacturing process, due to the influence of factors such as process angle and mismatch, the finally obtained reference voltage will deviate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56
CPCG05F1/562
Inventor 蔡超波宋树祥岑明灿陈新菡
Owner GUANGXI NORMAL UNIV
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