Multichannel pulse-height analyzer circuit based on LPC1764

A LPC1764, multi-channel pulse technology, applied in the field of detectors, can solve problems such as difficult to adapt to particle signal identification, accumulation signal recovery, poor anti-interference ability and flexibility, and achieve good anti-interference and reliability, good adaptability, The effect of stable work

Inactive Publication Date: 2018-05-29
邢筱丹
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  • Abstract
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  • Claims
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Problems solved by technology

Its anti-interference ability and flexibility are poor, and it is difficult to adapt to the harsh environment of

Method used

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  • Multichannel pulse-height analyzer circuit based on LPC1764
  • Multichannel pulse-height analyzer circuit based on LPC1764
  • Multichannel pulse-height analyzer circuit based on LPC1764

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with drawings and embodiments.

[0023] Such as figure 1 , in the analog front-end and A / D conversion circuit, the signal output by the nuclear detector is sent to the low-noise operational amplifier OPA843 for amplification after passing through the pole-zero phase cancellation circuit, and then sent to the A / D conversion chip AD9224 after shaping. AD9224 operates at a 40MHz clock The signal is continuously collected under control, and the collected data is directly sent to the CPLD for processing.

[0024] The A / D conversion circuit adopts AD9224 from Analog Devices, which is a 12-bit high-precision high-speed analog-to-digital converter, powered by +5V analog voltage, +3V or +5V digital voltage, providing reference voltage and high-performance sampling on-chip Hold amplifier; the sampling rate is 40MHz, and the input signal can be single-ended or differential. This design adopts single-ended input...

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Abstract

A multichannel pulse-height analyzer circuit based on a LPC1764 is suitable for the detector field, and comprises an analog front end and an A/D conversion circuit, a CPLD on-chip circuit, a USB interface circuit and a power supply protection circuit; the pulse-height analyzer circuit is compact in structure, small in size, stable in work, good in adaptability, low in power, can improve the work efficiency, and has very good interference immunity and reliability.

Description

technical field [0001] The invention relates to a multi-channel pulse amplitude analyzer circuit based on LPC1764, which is suitable for the field of detectors. Background technique [0002] In nuclear radiation measurement, the amplitude of the pulse signal output by the nuclear radiation detector is proportional to the energy of the incident particles, and the energy of the incident ray can be known by measuring the amplitude of the pulse signal. The basic principle of the multi-channel pulse amplitude analyzer is to divide the pulse amplitude range into n (the number of channels of the multi-channel pulse amplitude analyzer) amplitude intervals, by converting the analog pulse signal into a digital quantity corresponding to its amplitude, the The pulses in the amplitude interval are counted separately, and after a period of accumulation, the distribution curve of the pulse amplitude output by the nuclear radiation detector can be obtained. [0003] MCA in traditional on-l...

Claims

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Application Information

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IPC IPC(8): G01T1/17G01T1/175
CPCG01T1/17G01T1/175
Inventor 邢筱丹
Owner 邢筱丹
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