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Sampling resolution obtaining method and device and analog-to-digital converter

An acquisition method and acquisition device technology, applied in the acquisition of sampling resolution and the field of analog-to-digital converters, can solve the problems of sampling error, cost increase, and gear position cannot be continuously changed, and achieve high-resolution effects

Pending Publication Date: 2021-01-12
北京星云能动科技有限公司
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AI Technical Summary

Problems solved by technology

[0006] Method 1 uses a better AD chip, but it brings an increase in cost; Method 2 uses the method of switching gears, but this greatly sacrifices the sampling speed, and it is a pole switch, the gears cannot be continuously changed, and the switching is instantaneous sampling error

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  • Sampling resolution obtaining method and device and analog-to-digital converter
  • Sampling resolution obtaining method and device and analog-to-digital converter
  • Sampling resolution obtaining method and device and analog-to-digital converter

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Embodiment Construction

[0032] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0033] The present invention provides a sampling resolution acquisition method, such as figure 1 As shown, a sampling resolution acquisition method provided by the present invention includes:

[0034] 101: Obtain operational amplifier circuit parameters, gear adjustment signal DA and sampling signal one;

[0035] 102: According to the operational amplifier circuit parameters and the gear adjustment signal, perform signal processing on the sampling signal one S1 to obtain the sampling signal two S2;

[0036] 103: Obtain a sampling resolution according to the first sampling signal S1 and the second sampling signal S2.

[0037] Wherein, the gear adjustment signal is an analog signal.

[0038] Wherein, the operational amplifier circuit ...

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Abstract

The invention discloses a sampling resolution obtaining method and device and an analog-to-digital converter. The sampling resolution obtaining method comprises the steps: obtaining operational amplifier circuit parameters, a gear adjusting signal DA and a first sampling signal; according to the operational amplifier circuit parameters and the gear adjustment signal, performing signal processing on the first sampling signal S1 to obtain a second sampling signal S2; and acquiring a sampling resolution according to the first sampling signal S1 and the second sampling signal S2. By the adoption of the technical scheme, rapid and continuous gear adjustment can be achieved through the DA only through one operational amplifier circuit and one gear adjustment signal DA, and a measured signal hashigher resolution in the full range.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a sampling resolution acquisition method and device and an analog-to-digital converter. Background technique [0002] In the prior art, in many applications, such as a high-precision digital multimeter, it is necessary to measure a 5V signal to an accuracy of 0.02%, that is, an accuracy of 1mV. In order to achieve this accuracy, an analog-to-digital converter with a considerable resolution is first required, then At least one 14-bit resolution analog-to-digital converter is required. Under the 5V reference, 5 / (2^14) or 0.3mV can be distinguished. At this time, the error is 2 LSB (Least Significant Bit, least significant bit) In order to barely meet the accuracy requirements. The general method to increase the resolution is as follows: [0003] 1. Adopt a better AD chip; [0004] 2. Use the way of switching gears. [0005] In the inventor's method for improving the r...

Claims

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Application Information

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IPC IPC(8): H03M1/12
CPCH03M1/1245
Inventor 张杰胡娜
Owner 北京星云能动科技有限公司
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