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

Circuit and method for improving the precision of single-chip analog-to-digital conversion

A technology of analog-to-digital conversion and analog-to-digital converter, applied in the direction of analog-to-digital converters, etc., can solve problems such as the impact of analog-to-digital conversion accuracy, achieve the effects of reducing deviation, improving accuracy, and reducing analog deviation

Active Publication Date: 2018-11-09
SHENZHEN STAR INSTR
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a circuit and method for improving the precision of single-chip analog-to-digital conversion, which can solve the problem that the precision of analog-to-digital conversion is affected when the reference voltage source of the single-chip microcomputer changes dynamically

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
  • Circuit and method for improving the precision of single-chip analog-to-digital conversion
  • Circuit and method for improving the precision of single-chip analog-to-digital conversion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Please refer to figure 1 , Embodiment 1 of the present invention is:

[0040] A circuit for improving the precision of single-chip analog-to-digital conversion, said single-chip microcomputer includes a first analog-to-digital converter 2, a second analog-to-digital converter 4, a processor 6 and an internal reference voltage source 5; said first analog-to-digital converter The input end of converter 2 is connected to a sampling signal and a reference voltage source 3, and the output end is connected to the processor 6, and the reference voltage is the supply voltage of the single-chip microcomputer; the input end of the second analog-to-digital converter 4 is connected to the reference The voltage source 5 and the reference voltage source 3 are connected to the processor 6 at the output end; the reference voltage source 5 is an internal reference voltage source output by the single-chip microcomputer, and the value of the internal reference voltage source can be obtain...

Embodiment 2

[0042] Please refer to figure 2 , the second embodiment of the present invention is:

[0043] A method for improving the accuracy of analog-to-digital conversion of a single-chip microcomputer, the single-chip microcomputer includes an internal reference voltage source, and the method includes:

[0044] S1. Obtain the analog quantity of the sampling signal, and convert the analog quantity of the sampling signal into the digital quantity Dobj of the sampling signal;

[0045] S2. Obtain the analog quantity Vrefint of the reference voltage source inside the microcontroller, and convert the analog quantity of the reference voltage source into the digital quantity Drefint of the reference voltage source;

[0046] S3, according to formula Vref=(Din / Drefint)*Vrefint obtains actual reference voltage analog quantity, then according to Vobj 实 =(Dobj / Din)*Vref Obtain the digital quantity Vobj of the actual output sampling signal 实 ;

[0047] Wherein, Vref is the actual reference vol...

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

A circuit and method for improving precision of analog-to-digital conversion in a single-chip microcomputer. The method comprises: converting an analog quantity of a sample signal into a digital quantity Dobj (S1); converting an analog quantity Vrefint of a reference voltage source within a single-chip microcomputer into a digital quantity Drefint of the reference voltage source (S2); and then obtaining a digital quantity Vobjact of an actual output sample signal according to formulas Vref＝(Din / Drefint)*Vrefint, and Vobjact＝(Dobj / Din)*Vref (S3), wherein Vref is a reference voltage analog quantity, and Din is a full-scale digital quantity of analog-to-digital conversion. The same reference voltage source is used for analog-to-digital conversion of both an analog quantity of a sample signal and an analog quantity of a reference voltage source, thereby reducing a deviation between an analog quantity of an actual outputted sample signal and an analog quantity of the original sample signal caused by using an original reference voltage analog quantity, and effectively improving precision of analog-to-digital conversion in a single-chip microcomputer.

Description

technical field [0001] The invention relates to the technical field of single-chip microcomputers, in particular to a circuit and a method for improving the precision of analog-to-digital conversion of single-chip microcomputers. Background technique [0002] The single-chip microcomputer system performs analog-to-digital conversion (Analog-Digital-Converter) on a specific signal object, following the conversion formula: Dobj=(Vobj / Vref)*Din, where Dobj is the value after analog-to-digital conversion of the sampled signal object, and Vobj is the The sampling signal object is analog, Vref is the reference voltage analog, Din is the value at full scale, which depends on the sampling accuracy of the sampling device, such as 8-bit ADC, its Din value is 256, 10-bit ADC, its Din value is 1024. After the sampling accuracy of the sampling device is determined, the analog reference voltage Vref has an important influence on the result of analog-to-digital conversion, and its stabili...

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): H03M1/12
CPCH03M1/12
Inventor 娄震旦刘春华张玉清陈美淋
Owner SHENZHEN STAR INSTR