Amplitude measuring method and system based on high-speed comparator and RC integrating circuit

Abstract

The invention discloses an amplitude measuring system based on a high-speed comparator and an RC integrating circuit. The amplitude measuring system comprises an input module, a judgement module, a first measuring module, a second measuring module and a display module. The input module is used for receiving a pulse signal to be measured. The judgement module is used for detecting and judging the frequency of the pulse signal, and is connected with the input module. The first measuring module is used for measuring the amplitude of a low-frequency pulse signal, and is connected with the judgement module. The second measuring module is used for measuring the amplitude of a high-frequency pulse signal, and is connected with the judgement module. The display module is connected with the first measuring module and the second measuring module and is used for displaying the amplitude measured data. The invention also discloses an amplitude measuring method based on a high-speed comparator andan RC integrating circuit.

Description

technical field [0001] The invention belongs to the technical field of semiconductors, in particular to an amplitude measurement method and system based on a high-speed comparator and an RC integration circuit. Background technique [0002] At present, domestic methods for measuring the amplitude of pulse signals, especially high-speed pulse signals, are very scarce. Generally, an expensive peak detector and a high-precision ADC chip are used to complete the process of measuring the amplitude. [0003] When the pulse signal is output, it is easy to cause the output pulse signal to have a certain overshoot due to the influence of the signal source or external noise. If the peak detector accepts this overshoot as the amplitude at this time, the result will be wrong, or even Cause damage to the high-precision ADC chip behind. [0004] If the amplitude from the peak detection does not match the input VPP of the subsequent high-precision ADC, a corresponding attenuation circuit ...

AI Technical Summary

Problems solved by technology

[0002] At present, there are very few ways to measure the amplitude of pulse signals, especially high-speed pulse signals in China. Generally, an expensive peak detector and a high-precision ADC chip are used to complete the process of measuring the amplitude.

[0003] When the pulse signal is output, it is easy to cause the output pulse signal to have a certain overshoot due to the influence of the signal source or external noise. If the peak detector accepts this overshoot as the amplitude at this time, the result will be wrong, or even Cause damage to the high-precision ADC chip behind

[0004] If the amplitude from the peak detection does not match the input VPP of the subsequent high-precision ADC, a corresponding attenuation circuit must be performed, which may reduce the bandwidth of the entire circuit.

If the bandwidth is to be maintained, the high cost will be further increased

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