High-precision multichannel analog signal source

Abstract

The present invention relates to the field of electronic tests, in particular to a high-precision multichannel analog signal source which meets the requirement for an analog signal source in the current field of electronic tests. The analog signal source comprises a logic control unit, a memory and a waveform output circuit, wherein the waveform output circuit comprises a D / A converting circuit, a signal conditioning circuit, a multichannel change-over switch and a plurality of paths of analog signal output modules; and a recovery test circuit is arranged between the output end of the waveform output circuit and the logic control unit. The invention can independently output waveform analog signals, such as direct current, rectangular waves, and the like and provide high-precision analog signals in various waveforms for a performance test of a tested device; the output precision of the direct current signal can reach + / -0.0.5 percent FS and the establishing time of the rising edge of the rectangular wave is smaller than 200ns, thereby meeting the requirement during carrying out a channel bandwidth test on high-end electronic products, such as a telemetering programming device and other aerospace telemetering equipment; and the high-precision multichannel analog signal source of the present invention also has the advantages of simple and reasonable structure, stable performance and high validity and reliability of the signals.

Description

technical field [0001] The invention relates to the field of electronic testing, in particular to a high-precision multi-channel analog signal source. Background technique [0002] The analog signal source is an important part of the modern electronic test system, such as the performance test of the aerospace telemetry equipment-telemetry editor in the aerospace field. The analog signal source should provide reliable standard analog signals for the test of the telemetry editor. Various properties of the telemetry editor. With the rapid development of electronic instruments in high-tech fields such as aerospace, electronic test instruments have higher and higher requirements for the frequency stability and accuracy of analog signal sources, but the analog signals generated by existing analog signal sources have a single signal type. , The accuracy of the DC flow signal is not high, and the rising edge of the rectangular wave is too long to establish, etc., which cannot meet ...

AI Technical Summary

Problems solved by technology

With the rapid development of electronic instruments in high-tech fields such as aerospace, electronic test instruments have higher and higher requirements for the frequency stability and accuracy of analog signal sources, but the analog signals generated by existing analog signal sources have a single signal type. , DC flow signal accuracy is not high, rectangular wave rising edge settling time is too long and other issues, can not meet the development needs of the electronic testing field

Images