Portable digital storage oscilloscope based on SOPC technology

Abstract

The invention provides a portable digital storage oscilloscope based on SOPC technology. A to-be-detected signal is outputted to an RC attenuation circuit via an optocoupler, attenuation switching on the to-be-detected signal is completed, a broadband amplifier carried out buffer isolation on the to-be-detected signal after attenuation, a variable gain amplifier is used for adjusting the gain of the to-be-detected signal, the to-be-detected signal after adjustment is mixed with reference level via an ADC driver, analog-to-digital conversion is carried out via the ADC, an FPGA is used for storing and controlling a sampling signal, amplitude operation and frequency operation on the data are completed, spectrum analysis operation is carried out, and operation results are outputted to a man-machine interaction module for display. A hardware circuit is simplified, power consumption, the size and the cost are reduced, the sampling rate is high, and functions of signal waveform measurement, peak value measurement, effective value measurement, frequency measurement and signal spectrum analysis can be realized.

Description

technical field [0001] The invention belongs to the application field of instruments and meters, relates to on-chip programmable technology, and mainly relates to a portable digital storage oscilloscope. Background technique [0002] Judging from the current situation, foreign technologies in the field of digital storage oscilloscopes are quite mature and have occupied most of the domestic market share. Among them, the oscilloscopes produced by the three major foreign companies: American Tektronix, Agilent, and LeCroy are still in the market. on the mainstream. At present, the mainstream products of portable digital storage oscilloscopes are mainly used in the field of fault diagnosis and installation and debugging in the industrial field. Foreign high-end products have complete functions, excellent overall performance, and are very expensive; low-end products have no spectrum analysis function, and the price and cost of each unit is several thousand yuan, which affects the...

AI Technical Summary

Problems solved by technology

Using FPGA+MCU design scheme, the circuit design is relatively complicated, which is not conducive to reducing power consumption, size and development cost

[0004] The existing design scheme of portable digital storage oscilloscope based on FPGA simplifies the circuit design, but its function is relatively simple, limited to waveform test, without spectrum analysis function, and its performance is that the sampling rate is not high enough, and its application range is relatively large. narrow

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