A Data Acquisition System Based on High Speed ​​Analog-to-Digital Conversion and Time-to-Digital Conversion

Abstract

The present invention is a data acquisition system based on high-speed analog-to-digital conversion and time-to-digital conversion technology, belonging to the field of electronic technology, including a front-end signal conditioning module, which includes a discrimination circuit and a differential conditioning circuit; including a TDC chip and an ADC chip respectively The data acquisition module that receives the signal processed by the discrimination circuit and the differential conditioning circuit; the FPGA timing control unit connected to the TDC chip and the ADC chip respectively, and the FPGA timing control unit reads the data of the TDC chip and the ADC chip, and communicates with the DDR3 SDRAM memory and PCIE Connected to the bus, connected to the computer through the PCIE bus; used to input the trigger signal to the discrimination circuit when the ion enters the time-of-flight mass analyzer, and input the trigger signal to the pulse generator of the FPGA timing control unit, and the FPGA timing control unit receives After the trigger signal is received, a control sequence is generated to enable the ADC chip and the TDC chip to collect at the same time. The system can obtain the data collected by the ADC and TDC at the same time, and take advantage of the advantages of ADC collection and TDC collection.

Description

technical field [0001] The invention is a data acquisition system based on high-speed analog-to-digital conversion and time-to-digital conversion technology, and is especially suitable for data acquisition of time-of-flight mass spectrometers. The equipment and devices belong to the field of electronic technology. Background technique [0002] Time of Flight Mass Spectrometer (TOF-MS) has the advantages of fast analysis speed and high resolution, and is widely used in the fields of geology, material chemistry and environmental science. The data acquisition system is used to collect the ion signals output by the instrument, and its performance will directly affect important parameters such as the resolution and accuracy of the instrument, and is one of the key components of TOF-MS. [0003] There are two main types of data acquisition systems for time-of-flight mass spectrometers: ADC (Analog-to-Digital Conversion, ADC) data acquisition system and TDC (Time-to-Digital Convers...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a data acquisition system based on high-speed analog-to-digital conversion and time-to-digital conversion technology, to solve the shortcomings and deficiencies of TOF-MS instruments that only use ADC technology or TDC technology to collect ion signals

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