Square-wave generator and system and method for calibratig resistance voltage divider

Abstract

The invention discloses a system and a method for calibrating a water resistance voltage divider and a square-wave generator. The system comprises a square-wave generator and a water resistance voltage divider connected with the square-wave generator which is used for providing a square-wave signal and comprises a DC (Direct Current) voltage generator, a pulse forming line, a high-voltage gas switch and an output end in connection, wherein the DC voltage generator is used for outputting a DC voltage for charging the pulse forming line; and when the spark gap of the high-voltage gas switch is broken down by the pulse forming line, the output end outputs a square-wave signal. The water resistance voltage divider is calibrated by adopting the square-wave generator, and the generated square-wave signal rising edge has higher speed. A coaxial cable is adopted to connect a square-wave source and a specified-measuring calibration system as well as the measured water resistance voltage divider, and a broadband coaxial attenuator can decrease the amplitude of an original waveform and have less distortion so that the water resistance voltage divider can be accurately calibrated finally.

Description

technical field [0001] The invention relates to the technical field of high-power pulses, in particular to a calibration system and method for an electric square wave generator and a resistor divider. Background technique [0002] In the field of high-power pulse technology, how to accurately measure the high-voltage fast frontier pulse signal is a subject of continuous research. The use of water resistance voltage divider is a widely used measurement method. Before the water resistance voltage divider is used, the water resistance voltage divider needs to be calibrated. At present, the more common calibration method is to use a square wave source and use the comparison method for calibration. A square wave generator can be used as a square wave source. A square wave generator usually refers to a pulse voltage source that can generate a pulse with a certain rise time, a certain pulse width, and a rectangular waveform. [0003] However, most of the rising edges of the outp...

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Problems solved by technology

[0003] However, the rising edge of the existing square wave source output square wave is mostly slow, which cannot meet the requirements of calibrating the water resistance divider with nanosecond response

[0004] In addition, the calibration system of the water resistor divider is not standardized, and the connection has a great influence on the calibration results

In practical applications, since the response time of the water resistance divider is closely related to its capacitance to ground, when the capacitance to ground becomes larger, the response of the voltage divider will slow down; due to the relatively large size of the water resistance divider, if the wiring As the area enclosed by the loop becomes larger, it will be difficult to measure the square wave signal with a faster rising edge due to the increase of the loop inductance.

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