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Peripheral-component interface express (PCIE)-based multi-channel data acquisition unit

A data acquisition and multi-channel technology, applied in data acquisition and recording, electrical digital data processing, instruments, etc., to reduce transmission pressure, facilitate design, and protect integrity

Active Publication Date: 2010-12-29
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, as the number of channels for data acquisition increases, the real-time performance of data transmission for each channel becomes a difficult point in the design of multi-channel data acquisition.

Method used

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  • Peripheral-component interface express (PCIE)-based multi-channel data acquisition unit
  • Peripheral-component interface express (PCIE)-based multi-channel data acquisition unit
  • Peripheral-component interface express (PCIE)-based multi-channel data acquisition unit

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Embodiment Construction

[0021] First, the PCIE interface used in the present invention will be described. The PCIE interface can realize high-speed data transmission and is a popular data interface in the current personal computer motherboard. The full name of the PCIE interface is PCI Express, which adopts the current popular point-to-point serial connection method in the industry. Compared with the PCI interface and the shared parallel architecture of the earlier computer bus, each device has its own dedicated connection and does not need to connect to the entire bus. Requesting bandwidth can increase the data transfer rate to a very high rate, reaching the high bandwidth that the PCI interface cannot provide. Moreover, compared with the traditional PCI bus that can only realize one-way transmission in a single time period, the dual-simplex connection of PCIE can provide higher transmission rate and quality. The interface of PCIE varies according to the bus bit width, including X1, X4, X8 and X16 ...

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Abstract

The invention discloses a PCIE-based multi-channel data acquisition unit. By adopting a PCIE protocol, a feedback type enhanced phase lock loop and a pingpong buffer structure, the multi-channel high-rate data sampling, the clock synchronization among channels and the data transmission real-time property of each channel can be realized.

Description

technical field [0001] The invention relates to a data acquisition device, in particular to a multi-channel data acquisition device based on the PCIE protocol. Background technique [0002] The current digital signal processing technology is developing at a rapid pace, and the design concept of "software radio" is increasingly recognized by the industry. The core of the "software radio" technology is to move the analog-to-digital conversion closer to the radio frequency antenna, that is, to apply more digital signal processing technology. At present, the basic theory of digital signal processing has been developed very maturely, which can make better use of these advanced technological achievements and improve the overall quality of the system. [0003] However, the core of the "software radio" technology needs the support of high-speed data acquisition devices, because according to the Nyquist theorem, the closer the analog-to-digital conversion is to the radio frequency a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/40G06F13/38
Inventor 梁广龚文斌余金培刘会杰
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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