High-speed synchronous data acquisition card

Abstract

The invention relates to a synchronous data acquisition card (DAC) with a high speed which comprises a mother board and a plurality of groups of daughter boards. The daughter boards are provided with a daughter board analog interface bus, a daughter board functional circuit and a daughter board digital interface bus. The daughter board analog interface bus is connected with an analog socket, and the daughter board digital interface bus is connected with a digital socket. The daughter board digital interface bus comprises sixteen data signal lines, two clock signal lines, three AD configuration signal lines, three daughter board functional configuration signal lines, a +5V line and a +3.3V line; the daughter board analog interface bus comprises a group of + / -5 power lines, a group of + / -15 power lines, two analog input lines (ACH+ and ACH-), a zero-bias offset line (OF-PZ), a zero-bias calibration line (OF-ADJ), a full-bias calibration line (FS-ADJ), a reference voltage line (REF) and an analog output line (AOUT). The synchronous DAC with the high speed solves the technical problems that the existing synchronous DAC is single in product function, low in sampling precision and bad in synchronism, and has the advantages of high speed synchronization, large cache and high precision.

Description

technical field [0001] The invention relates to the technical field of virtual instruments, in particular to a high-speed synchronous data acquisition card based on PXI or PCI bus. Background technique [0002] At present, there are few high-speed synchronous data acquisition cards based on PXI or PCI bus in China, and there are few products with a resolution of 16 bits. Most of the similar products have single functions, only analog input functions, and the sampling accuracy and synchronization performance are relatively poor. [0003] However, with the rapid development of modern science and technology, especially in aerospace and military fields, the sampling accuracy and synchronization performance requirements for synchronous data acquisition are getting higher and higher. There is an urgent need for a synchronous data acquisition card that has high sampling accuracy and synchronization performance for synchronous data acquisition, and also provides a variety of auxilia...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems of the existing synchronous data acquisition card products with single function, poor sampling accuracy and synchronization, the present invention provides a high-speed synchronous data acquisition card, which solves the difficulties of high precision and high speed, and has high-speed synchronization, large cache, and high-precision advantage

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