Timed signal extraction device and method

Abstract

The invention relates to a timed signal extraction device and method. The device comprises a trigger discriminating module, a baseline tracking module and a time analysis module; the trigger discriminating module determines whether deltaV(t) is an effective triggering signal according to the deltaV(t) and a baseline drift range V noise, when the deltaV(t) is an effective triggering signal, timed extraction in this time is started, the characteristic voltage deltaV(t)=F1(t)-F2(t), F1(t) represents a sampling signal, F2(t) represents a first time delay signal delayed for one period after the F1(t), and t represents a time variable; the baseline tracking calculates a baseline sampling value baseline for a sampling point of the F1(t); and the time analysis module determines an effective time point Tr according to F2(t), F1(t) and baseline. An ADC is used to carry out waveform digital collection on an output signal of the detector, a signal rising point is timed accurately, time is extracted, an error of the timed point can be overcome effectively, and the timing precision is improved.

Description

Technical field [0001] The present invention relates to the field of time measurement, in particular to a signal timing extraction device and method. Background technique [0002] Time measurement is also a very important part of nuclear electronics. A lot of information about nuclear events is present in the output signals of nuclear radiation detectors in the form of time information, such as the nuclear excited state lifetime, positron annihilation lifetime, etc., which is the time relationship between one nuclear state and another nuclear state. It is the distribution of the time interval between two signals. Therefore, in order to study the nature of these nuclear events, the time information carried by the detector output signal must be measured. [0003] Currently commonly used time measurement is mainly divided into two parts: timing discrimination and time-to-digital conversion TDC (Time-to-Digital Converter). The function of timing is to find the time point determined ...

AI Technical Summary

Problems solved by technology

[0005] 1) The circuit is composed of multi-stage analog circuits, and more noise interference will be superimposed during the transmission of the detector output signal;

[0006] 2) It is greatly affected by time shaking, and the timing process is more disturbed and the accuracy is lower;

[0007] 3) The integration degree of the circuit structure is low, the power consumption is large, and the cost is high;

[0008] 4) Poor system scalability

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