Timing counter based on pxi bus

Abstract

The invention relates to the technical field of a virtual instrument and particularly relates to a timing counter based on a PXI bus. The timing counter based on the PXI bus comprises analog circuit parts and a digital circuit part, wherein two groups of the parallel analog circuit parts are arranged; the first group comprises a first AD (Analog-Digital) conversion circuit, a first resistance switching circuit, a first attenuation circuit, a first amplification circuit and a first comparator, which are connected in sequence; the second group comprises a second AD conversion circuit, a second resistance switching circuit, a second attenuation circuit, a second amplification circuit and a second comparator, which are connected in sequence; a first branch circuit is further arranged between a first amplifier and the first comparator and is connected to the second comparator; the digital circuit part comprises a PIX interface, a clock circuit and an FPGA (Field Programmable Gate Array); and the PIX interface and the clock circuit are connected with the FPGA respectively, and the first comparator and the second comparator are connected with the FPGA. The timing counter based on the PXI bus can be used for measuring an analog signal and a digital signal.

Description

technical field [0001] The invention relates to the technical field of virtual instruments, in particular to a timing counter based on a PXI bus. Background technique [0002] At present, the timing counters for measuring physical quantities such as frequency and period at home and abroad are mainly desktop frequency meters. The desktop instrument is not only bulky, but also inconvenient to be integrated in the automated test system. A small number of timing counter modules based on PXI bus at home and abroad can only measure digital signals, and cannot directly measure analog signals. Contents of the invention [0003] The invention aims to propose a PXI bus-based timing count capable of measuring digital signals and analog signals. [0004] Technical scheme of the present invention is: [0005] A timing counter based on the PXI bus, including an analog circuit module and a digital circuit module; [0006] The analog circuit module includes two groups in parallel, the...

AI Technical Summary

Problems solved by technology

The desktop instrument is not only bulky, but also inconvenient to be integrated in the automated test system

A small number of timing counter modules based on the PXI bus at home and abroad can only measure digital signals, and cannot directly measure analog signals

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