Proportional photon correlator based on digital signal processor (DSP) annular buffer area
A ring buffer and photon correlator technology, which is applied in scientific instruments, measuring devices, particle size analysis, etc., can solve the problem of not being able to determine the delay time of the proportional correlator channel in advance, the design problem of the delay unit of the photon count value, and hinder the proportional photon correlator Implementation and other issues, to achieve the effect of flexible delay time, low hardware cost, and large dynamic range
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[0044] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention will be further explained below in conjunction with specific drawings.
[0045] Reference figure 2 , image 3 , Proportional photon correlator based on DSP ring buffer, including FPGA chip circuit, DSP chip circuit, and computer PC. DSP chip circuit is connected to FPGA chip circuit and computer PC respectively. The FPGA chip circuit includes a sampling time setting module SampleTime, a reset module Reset, and a photon counting module Counter. The DSP chip circuit includes a related channel delay time calculation module, a ring buffer, and a related calculation module. The FPGA chip circuit generates a sampling clock signal and counts the photon pulses. The DSP chip circuit realizes the function of the shift register through the ring buffer, and sets the delay time of each channel according to the ratio R of the delay time of ...
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