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Sampling system and method for improving ADC resolution

A sampling system and resolution technology, applied in signal transmission system, electrical signal transmission system, instrument, etc., can solve the problem of high cost

Pending Publication Date: 2021-03-19
QINGDAO MAGENE INTELLIGENCE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most SAR ADCs are less than 12 bits. It is very expensive to use more than 12 bits of ADC to increase the resolution. Now there is an urgent need for a sampling system that can improve the resolution of the ADC without using a high-bit ADC.

Method used

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  • Sampling system and method for improving ADC resolution

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Effect test

Embodiment 1

[0041] Embodiment one: a kind of sampling system that improves ADC resolution, comprises reference circuit 1, data selector 2, programmable amplifier 3, reference circuit 5, analog-to-digital converter 4 and MCU6 (micro control unit); Reference circuit 1 is used for Provide a plurality of voltage signals, the data selector 2 is connected with the reference circuit 1, the data selector 2 collects a plurality of voltage signals provided by the reference circuit 1, and selects one of the voltage signal outputs; one of the input terminals of the program-controlled amplifier 3 is connected with the data selection The output end of the device 2 is connected, and the other input end of the program-controlled amplifier 3 is used to input the acquisition signal; the acquisition signal is a voltage signal. The program-controlled amplifier 3 is used to calculate the difference between the voltage signal input by the data selector 2 and the acquisition signal, and then outputs the differen...

Embodiment 2

[0046] Embodiment two: a kind of sampling method that improves ADC resolution, comprises the following steps:

[0047] S01, the collected acquisition signal is transmitted to the program-controlled amplifier 3 as a voltage signal;

[0048] S02. The data selector 2 selects a voltage signal closest to the acquisition signal from the reference circuit 1 and inputs it to the programmable amplifier 3;

[0049] S03, after the program-controlled amplifier 3 receives the acquisition signal and the voltage signal, amplifies the difference between the two signals and transmits it to the analog-to-digital converter 4;

[0050] S04, the analog-to-digital converter 4 combines the reference voltage to convert the received difference signal into a digital signal and then output it to the MCU6;

[0051] S05, MCU6 reads the digital signal input by the analog-to-digital converter 4 and calculates the voltage value of the collected signal;

[0052] By using the program-controlled amplifier 3 t...

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Abstract

The invention discloses a sampling system and method for improving ADC resolution, and relates to the technical field of ADC sampling, and the key points of the technical scheme are that the samplingsystem comprises a standard circuit; a data selector connected with the standard circuit; a programmable amplifier one input end of which is connected with the data selector, and the other input end of which is used for inputting acquisition signals; a reference circuit used for providing a reference voltage signal; an analog-to-digital converter connected with the programmable amplifier and the standard circuit; and a MCU the input end of which is connected with the output end of the analog-to-digital converter. The sampling method comprises the following steps: S01, acquiring signals and transmitting the signals to the programmable amplifier; S02, inputting a voltage signal into the programmable amplifier; S03, by the programmable amplifier, amplifying a difference value and then transmitting the amplified difference value to the analog-to-digital converter; S04, by the analog-to-digital converter, converting the difference value into a digital signal and outputting the digital signal to the MCU; and S05, by the MCU, reading the digital signal input by the analog-to-digital converter and calculating the voltage value of the acquired signal. The resolution of the analog-to-digitalconverter is improved through the amplification effect of the programmable amplifier.

Description

technical field [0001] The present invention relates to the technical field of ADC sampling, more specifically, it relates to a sampling system and a sampling method for improving the resolution of ADC. Background technique [0002] When detecting temperature, air pressure, humidity, etc., the analog-to-digital converter is referred to as ADC, which usually refers to an electronic component that converts an analog signal into a digital signal. Generally speaking, an ADC is a digital signal that converts an input voltage signal into an output. Signal; different ADCs have different resolutions due to different bits. [0003] Most SAR ADCs are less than 12 bits, and it is very costly to use more than 12-bit ADCs to improve the resolution. Now there is an urgent need for a sampling system that can improve the resolution of the ADC without using a high-bit ADC. Contents of the invention [0004] In view of the deficiencies in the prior art, the object of the present invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/54
CPCH03M1/54
Inventor 于锋张召德
Owner QINGDAO MAGENE INTELLIGENCE TECH CO LTD
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