Unlock instant, AI-driven research and patent intelligence for your innovation.

Voltage reference source with low power consumption and low temperature coefficient

A low temperature coefficient, voltage reference source technology, applied in the direction of regulating electrical variables, control/regulating systems, instruments, etc., can solve the problems of high reference output voltage, complex structure, and high power consumption, reducing power consumption and realizing structural Simplified, simple structure effect

Inactive Publication Date: 2014-07-09
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems of high reference source power supply voltage, high reference output voltage, high power consumption and complicated structure in the above-mentioned prior art, the present invention proposes a low power consumption and low temperature coefficient voltage reference

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Voltage reference source with low power consumption and low temperature coefficient
  • Voltage reference source with low power consumption and low temperature coefficient
  • Voltage reference source with low power consumption and low temperature coefficient

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] As a preferred embodiment of the present invention, the present invention discloses a voltage reference source with low power consumption and low temperature coefficient, which includes a compensation current generating circuit and a first-order temperature compensation circuit. The compensation current of the compensation current generating circuit is determined by the working Provided by the NMOS tube in the subthreshold area, the first-order temperature compensation circuit is composed of an enhanced NMOS tube and a depletion-type NMOS tube, the compensation current generation circuit is connected with the first-order compensation circuit, and the compensation current generation circuit works in the subthreshold area The depletion-type NMOS transistor introduces compensation current for the first-order compensation circuit, thereby outputting a reference voltage with a low temperature coefficient.

Embodiment 2

[0020] As the best implementation mode of the present invention, it will be specifically described below in conjunction with the accompanying drawings:

[0021] The schematic diagram of the low power consumption and low temperature coefficient voltage reference source circuit of the present invention is as follows: figure 1 shown.

[0022] Wherein, the compensation current generating circuit includes a depletion-type NMOS transistor MD1 and an enhanced-type NMOS transistor ME0 and ME1. Among them, the drain of the depletion NMOS transistor MD1 is connected to the external power supply voltage, the gate of the depletion NMOS transistor MD1 is grounded, the source of the depletion NMOS transistor MD1, the drain and the gate of the enhancement NMOS transistor ME0 are connected to the enhancement The gate of the enhanced NMOS transistor ME1 is connected as node A, the source of the enhanced NMOS transistor ME0 is grounded, the source of the enhanced NMOS transistor ME1 is grounde...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a voltage reference source with low power consumption and low temperature coefficient, relates to the technical field of power supply voltage, and includes a compensation current generating circuit and a first-order temperature compensation circuit. The compensation current of the compensation current generating circuit operates in a subthreshold region Provided by the NMOS tube, the first-order temperature compensation circuit is composed of an enhanced NMOS tube and a depletion-type NMOS tube, the compensation current generation circuit is connected with the first-order compensation circuit, and the depletion-type The NMOS tube introduces a compensation current for the first-order compensation circuit, thereby outputting a reference voltage with a low temperature coefficient. The present invention adds a new zero temperature coefficient point on the reference voltage temperature curve, so that the reference module has good temperature stability, and at the same time, the voltage reference source also has the characteristics of low power consumption, and can work under low power supply voltage , and is suitable for analog integrated circuits, high-precision digital-to-analog conversion circuits and pure digital integrated circuits.

Description

technical field [0001] The invention relates to the technical field of power supply voltage, in particular to a voltage reference source with low power consumption and low temperature coefficient. Background technique [0002] High-precision voltage reference sources with high power supply rejection ratio and low temperature coefficient are required in analog, digital-analog hybrid, and even pure digital circuits. 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 and to improve the power utilization efficiency, the voltage reference must have the characteristics of high temperature stability, high power supply rejection ratio and low power consumption. [0003] As fo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/56
Inventor 甄少伟龚靖龚剑胡烽罗萍贺雅娟张波
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA