A Field Programmable Gate Array Digital Correlator with Storage Structure

Abstract

The invention provides a field programmable gate array digital correlator with a storage structure, comprising a shell and a circuit board, the shell is covered on the circuit board, two photon pulse input ports, a power supply interface, Switch and communication interface, described two photon pulse input ports, power supply interface, switch and communication interface are connected with circuit board, described circuit board is provided with FPGA chip, and described FPGA chip comprises computing unit, light intensity signal acquisition module and Communication module, the operation unit is connected with the light intensity signal acquisition module and the communication module respectively, the operation unit is used to process the signal, and the light intensity signal acquisition module is used to quantify the analog electrical signal or pulse signal of the external light intensity, so The communication module is used to transmit the operation result to the external device and receive the control instruction of the external device; the present invention utilizes the memory resources in the chip and multiplexes the multiplier to increase the maximum number of channels that can be synthesized by the FPGA hardware photon correlator.

Description

technical field [0001] The invention relates to the technical field of photon correlation spectrum measurement, in particular to a field programmable gate array digital correlator with a storage structure. Background technique [0002] In order to obtain the correlation curve to describe the time correlation of the scattered light intensity, the main device currently used is a photon correlator or a digital correlator. The correlator is the core device of the photon correlation technology measurement system. It obtains the time autocorrelation function of scattered light intensity by performing real-time autocorrelation operation on photon counting data. The application range of photon correlation technology has been widely extended to actual industrial production. [0003] At present, the software correlator and the hardware correlator are two mainstream implementation methods of the correlator. [0004] For the hardware correlator, the correlation calculation of the pho...

AI Technical Summary

Problems solved by technology

If the multiplier has been exhausted, the synthesizer will choose to use only logic cells instead of using the embedded multiplier to synthesize a channel, so that each additional channel will consume more resources

As the number of channels increases, all logic units and multiplier resources in the FPGA will soon be used up

It is worth noting that, regardless of the number of channels, the linear correlator structure cannot utilize the memory resources in the FPGA

[0008] It can be seen that there is a serious problem of insufficient resource utilization in the FPGA digital correlator, which limits the important indicator of the maximum number of channels that can be synthesized by an FPGA.

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