CN202975067U

CN202975067U - Active probe of oscilloscope

Info

Publication number: CN202975067U
Application number: CN 201220686822
Authority: CN
Inventors: 巫伟武
Original assignee: DEKEM ELECTRONIC (GUANGZHOU) Co Ltd
Current assignee: DEKEM ELECTRONIC (GUANGZHOU) Co Ltd
Priority date: 2012-12-12
Filing date: 2012-12-12
Publication date: 2013-06-05
Anticipated expiration: 2022-12-12

Abstract

The utility model relates to an active probe of an oscilloscope. The active probe comprises a positive feeler pin, a negative feeler pin, a voltage division module, a differential module and a power supply module. The positive feeler pin and the negative feeler pin are respectively electrically connected with the voltage division module, the voltage division module, the differential module and the power supply module are sequentially electrically connected with the one another, and electric signals are outputted by the differential module to the oscilloscope. The active probe has the advantages that the active probe can be used for measuring high voltage owing to the voltage division module, and can be used for measuring high common-mode voltage owing to the differential module, and accordingly application scenarios of the active probe are expanded.

Description

Oscillographic active probe

Technical field

The utility model relates to oscilloprobe.

Background technology

Oscillograph is a kind of electronic measuring instrument, it can be transformed into image with electric signal such as electric current, voltage signal, show intuitively the electric signal feature that detects, oscilloprobe is the electronic unit that connects circuit-under-test and oscillograph input end, and its accuracy to measurement result is most important.

At present, oscillographic probe on the market is generally passive probe, and its applicable circuit environment is very limited, and function is very single.

The utility model content

The purpose of this utility model is to propose a kind of oscillographic active probe, and it can solve the problem of function singleness.

In order to achieve the above object, the technical scheme that adopts of the utility model is as follows:

Oscillographic active probe, it comprises anodal probe, negative pole probe, division module, difference block and supply module, anodal probe, negative pole probe are electrically connected with division module respectively, division module, difference block, supply module are electrically connected successively, and described difference block output electrical signals is given an oscillograph.

Preferably, described supply module is electrically connected to the city.

Preferably, for the ease of using, described supply module is connected with civil power or battery by a selector switch, so that when there is no the civil power access, can power by battery.

The utlity model has following beneficial effect:

Have division module, can be used for high-tension measurement, have difference block, can be used for measuring the common mode high pressure, expanded the application scenarios of probe.

Description of drawings

Fig. 1 is the circuit block diagram of the oscillographic active probe of the utility model embodiment one;

Fig. 2 is the circuit block diagram of the oscillographic active probe of the utility model embodiment two.

Embodiment

Below, by reference to the accompanying drawings and embodiment, the utility model is described further:

Embodiment one

As shown in Figure 1, oscillographic active probe, it comprises anodal probe, negative pole probe, division module, difference block and supply module, and anodal probe, negative pole probe are electrically connected with division module respectively, and division module, difference block, supply module are electrically connected successively.

During use, supply module is accessed civil power, to power to difference block; Output terminal access oscillograph with difference block.

Anodal probe, negative pole probe access respectively the two ends of circuit under test, obtain the electric signal at circuit under test two ends, division module is carried out the step-down processing to the electric signal of access, difference block compares computing to the electric signal at two ends, the electric signal of output after relatively be to oscillograph, the corresponding waveform of this electric signal of oscilloscope display.

Embodiment two

As shown in Figure 2, the difference of the present embodiment and embodiment one is, supply module is connected with a selector switch.When the access civil power, civil power is powered to supply module; When there is no the civil power access, battery is powered to supply module.Described selector switch can be a kind of mechanical switch structure, and when selector switch was combined, the conducting strip of selector switch and battery disconnected when city's plug; When city's plug does not insert, the conducting strip of selector switch and battery engagement.

The using method of the present embodiment is identical with embodiment one.

For a person skilled in the art, can make other various corresponding changes and distortion according to technical scheme described above and design, and these all changes and the distortion all should belong to the protection domain of the utility model claim within.

Claims

1. oscillographic active probe, it is characterized in that, comprise anodal probe, negative pole probe, division module, difference block and supply module, anodal probe, negative pole probe are electrically connected with division module respectively, division module, difference block, supply module are electrically connected successively, and described difference block output electrical signals is given an oscillograph.

2. oscillographic active probe as claimed in claim 1, is characterized in that, described supply module is electrically connected to the city.

3. oscillographic active probe as claimed in claim 1, is characterized in that, described supply module is connected with civil power or battery by a selector switch.