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High-speed digital storage oscilloscope front-end circuit

A digital storage and front-end circuit technology, applied in digital variable display, digital variable/waveform display, instruments, etc., can solve the problems of high-speed ADC devices such as expensive, unfavorable, cost reduction, etc., to achieve good anti-interference and reliability, The effect of stable work and high precision of data conversion

Inactive Publication Date: 2018-03-06
陶崇立
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the development of electronic devices, there are more and more high-speed ADC devices with a sampling rate above 1 GS / s, and the price of high-speed ADC devices is also very expensive, which is not conducive to reducing costs

Method used

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  • High-speed digital storage oscilloscope front-end circuit

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with drawings and embodiments.

[0019] Such as figure 1 , The passive attenuation circuit uses S1 and S2 to select 10 times or 100 times the attenuation range. When the signal is small, the signal passes through R,1. In order to ensure the reliable operation of the attenuator, it should be added a load with a large impedance, generally this impedance is 1 M ohm. Considering the influence of distributed capacitance at high frequency, it needs to be compensated. Therefore, C1, C2, C3, and C4 are compensation capacitors. Adjusting C1 and C2 can ensure the same input capacitance under three different magnifications. The low-frequency attenuation is determined by R2, R3, R4, and R5, and the high-frequency attenuation is determined by C3, C4, C5, and C6. The circuit meets the best compensation; and this circuit meets the input impedance of 1M ohms.

[0020] Such as figure 2 , In the impedance transform...

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Abstract

A high-speed digital storage oscilloscope front-end circuit is suitable for the field of digital oscilloscopes. The circuit is composed of a passive attenuation circuit, an impedance transformation circuit, a main amplifier circuit and a high-speed parallel A / D circuit. The circuit is compact in structure, small in size, high in data conversion accuracy, and stable in operation. It is suitable for various detection environments, improves work efficiency, has low power consumption, and has good anti-interference and reliability.

Description

Technical field [0001] The invention relates to a front-end circuit of a high-speed digital storage oscilloscope, which is suitable for the field of digital oscilloscopes. Background technique [0002] Digital storage oscilloscope DSO (digital storage oscilloscope) is one of the commonly used instruments for electronic signal measurement. It is widely used in various industries such as electronics, machinery, textiles and military applications. Sampling rate is one of the important indicators of digital storage oscilloscope, it depends on the front-end circuit of the oscilloscope, such as signal conditioning and analog-to-digital conversion. Therefore, the design of the front-end circuit has become a key link in the design of the digital storage oscilloscope. With the continuous development of electronic technology, the proportion of high-speed signals in various electronic products is getting higher and higher. The measurement of these high-speed signals is often necessary...

Claims

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Application Information

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IPC IPC(8): G01R13/02
CPCG01R13/0218G01R13/0209
Inventor 陶崇立
Owner 陶崇立
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