CN212905115U - AC/DC current probe circuit - Google Patents
AC/DC current probe circuit Download PDFInfo
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- CN212905115U CN212905115U CN202021322359.8U CN202021322359U CN212905115U CN 212905115 U CN212905115 U CN 212905115U CN 202021322359 U CN202021322359 U CN 202021322359U CN 212905115 U CN212905115 U CN 212905115U
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Abstract
The utility model discloses an AC/DC current probe circuit, which comprises an input/output module, a power switch and transformation ratio module, a central instruction processing module and a power module; the input and output module: the oscilloscope is used for inputting a current signal and outputting the processed current signal to the oscilloscope; the power switch and ratio change module: the attenuation ratio is used for connecting the power supply module and controlling the input current signal; the central instruction processing module: the current attenuation circuit is used for attenuating an input current signal; the power supply module: for providing power to the circuit. The utility model relates to an alternating current-direct current probe circuit has increased a power module and adapter interface, lets voltage can give chip power through the circuit, if the user forgets to carry the adapter can directly use the 9V dry battery, carries the trip for the engineer and facilitates.
Description
Technical Field
The utility model relates to an oscilloscope field, in particular to alternating current-direct current probe circuit.
Background
Current probes on current oscilloscopes are basically divided into two categories: the AC current probe is a passive probe which is common and low in cost but cannot process direct current components; the AC/DC current probe is usually an active probe, and is divided into a low-frequency probe and a high-frequency probe, wherein the common bandwidth of the low-frequency probe is below several hundred KHz, the bandwidth of the high-frequency probe is generally above several MHz, but most of the current probes are connected with adapters independently to work.
At present, the current probe is widely applied, the bandwidth and the current of the probe start to be continuously increased, but the power supply mode is single, and most of the current probe and the adapter are integrated, so that the inconvenience of carrying is caused.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides an alternating current and direct current probe circuit.
The utility model provides a technical scheme that its technical problem adopted is:
an alternating current and direct current probe circuit comprises an input/output module, a power switch and transformation ratio module, a central instruction processing module and a power module;
the input and output module: the oscilloscope is used for inputting a current signal and outputting the processed current signal to the oscilloscope;
the power switch and ratio change module: the attenuation ratio is used for connecting the power supply module and controlling the input current signal;
the central instruction processing module: the current attenuation circuit is used for attenuating an input current signal;
the power supply module: for providing power to the circuit.
Further, the power module comprises a chip U3, a capacitor C8, a capacitor C9, a capacitor C10, a resistor R22 and a zener diode D4, wherein a VDD pin of the chip U3 is connected to one end of the capacitor C8, a Pled pin of the chip U3 is connected to the VDD pin of the chip U3, the VDD pin of the chip U3 is connected to the VDD terminal, a Zero pin of the chip U3 is connected to the other end of the capacitor C8, a Zero pin of the chip U3 is connected to one end of the capacitor C9, a Zero pin of the chip U3 is grounded, a Pwr pin of the chip U3 is connected to the other end of the capacitor C9, the resistor R22 is arranged between a Pwr pin of the chip U3 and a cathode of the zener diode D4, a cathode of the zener diode D4 is connected to the test port TP 4, an anode of the zener diode D4 is grounded, and a cathode of the zener diode D4 is arranged between the zener diode D4 and the ground.
Further, the model of the chip U3 is MIC 5232-2.8.
Further, the central instruction processing module comprises a chip U2, and the model of the chip U2 is PIC16LF 15325.
Further, the central instruction processing module comprises a chip U4, and the model of the chip U4 is MCP 4726.
Further, the power switch and the transformation ratio module are connected with the central instruction processing module through pins 3, 5 and 6 of the chip U2.
Further, the input/output module is connected with the central instruction processing module through a pin 1 of the chip U4.
The utility model has the advantages that: the utility model relates to an alternating current-direct current probe circuit has increased a power module and adapter interface, lets voltage can give chip power through the circuit, if the user forgets to carry the adapter can directly use the 9V dry battery, carries the trip for the engineer and facilitates.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic diagram of a circuit structure of an input/output module according to the present invention;
fig. 2 is a schematic circuit diagram of the central instruction processing module according to the present invention;
fig. 3 is a schematic circuit diagram of the power switch and the ratio-changing module of the present invention;
fig. 4 is a schematic diagram of a circuit structure of the power module of the present invention;
fig. 5 is a flow chart of the working principle of the circuit of the present invention.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. In addition, all the connection/connection relations referred to in the patent do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection auxiliary components according to specific implementation conditions. The utility model discloses each technical feature in the creation can the interactive combination under the prerequisite that does not contradict conflict each other.
Referring to fig. 1 to 5, the present invention provides an ac/dc current probe circuit, which includes an input/output module, a power switch and ratio conversion module, a central instruction processing module and a power module;
as shown in fig. 1, the input-output module: the oscilloscope is used for inputting a current signal and outputting the processed current signal to the oscilloscope;
as shown in fig. 3, the power switch and ratio change module: the attenuation ratio is used for connecting the power supply module and controlling the input current signal;
as shown in fig. 2, the central instruction processing module: the current attenuation circuit is used for attenuating an input current signal;
as shown in fig. 4, the power module: used for providing power supply for circuits, comprises a chip U3 with the model number of MIC5232-2.8, a capacitor C8, a capacitor C9, a capacitor C10, a resistor R22 and a zener diode D4, the VDD pin of the chip U3 is connected with one end of a capacitor C8, the Pled pin of the chip U3 is connected with the VDD pin of the chip U3, the VDD pin of the chip U3 is connected with a VDD terminal, the Zero pin of the chip U3 is connected with the other end of the capacitor C8, the Zero pin of the chip U3 is connected to one end of a capacitor C9, the Zero pin of the chip U3 is grounded, the Pwr pin of the chip U3 is connected with the other end of the capacitor C9, the resistor R22 is arranged between the Pwr pin of the chip U3 and the negative electrode of the voltage stabilizing diode D4, the cathode of the zener diode D4 is connected to the test port TP6, the anode of the zener diode D4 is grounded, and the capacitor C10 is disposed between the cathode of the zener diode D4 and the ground.
Further, the central instruction processing module comprises a chip U2, and the model of the chip U2 is PIC16LF 15325.
Further, the central instruction processing module comprises a chip U4, and the model of the chip U4 is MCP 4726.
Further, the power switch and the transformation ratio module are connected with the central instruction processing module through pins 3, 5 and 6 of the chip U2.
Further, the input/output module is connected with the central instruction processing module through a pin 1 of the chip U4.
The utility model relates to an alternating current-direct current probe circuit has increased a power module and adapter interface, lets voltage can give chip power through the circuit, if the user forgets to carry the adapter can directly use the 9V dry battery, carries the trip for the engineer and facilitates.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.
Claims (7)
1. An alternating current and direct current probe circuit is characterized in that: the power supply comprises an input/output module, a power switch and ratio change module, a central instruction processing module and a power supply module;
the input and output module: the oscilloscope is used for inputting a current signal and outputting the processed current signal to the oscilloscope;
the power switch and ratio change module: the attenuation ratio is used for connecting the power supply module and controlling the input current signal;
the central instruction processing module: the current attenuation circuit is used for attenuating an input current signal;
the power supply module: for providing power to the circuit.
2. The ac-dc current probe circuit according to claim 1, wherein: the power supply module comprises a chip U3, a capacitor C8, a capacitor C9, a capacitor C10, a resistor R22 and a zener diode D4, wherein a VDD pin of the chip U3 is connected with one end of the capacitor C8, a Pled pin of the chip U3 is connected with a VDD pin of the chip U3, the VDD pin of the chip U3 is connected with a VDD terminal, a Zero pin of the chip U3 is connected with the other end of the capacitor C8, a Zero pin of the chip U3 is connected with one end of the capacitor C9, a Zero pin of the chip U3 is grounded, a Pwr pin of the chip U3 is connected with the other end of the capacitor C9, the resistor R22 is arranged between the Pwr pin of the chip U3 and the negative pole of the zener diode D4, the negative pole of the zener diode D4 is connected with a test port TP6, the positive pole of the zener diode D4 is grounded, and the capacitor C10 is arranged between the negative pole of the zener diode D4 and the ground.
3. The ac-dc current probe circuit according to claim 2, wherein: the model of the chip U3 is MIC 5232-2.8.
4. The ac-dc current probe circuit according to claim 1, wherein: the central instruction processing module comprises a chip U2, and the model of the chip U2 is PIC16LF 15325.
5. The ac-dc current probe circuit according to claim 1, wherein: the central instruction processing module comprises a chip U4, and the model of the chip U4 is MCP 4726.
6. The ac-dc current probe circuit according to claim 4, wherein: the power switch and the transformation ratio module are connected with the central instruction processing module through pins 3, 5 and 6 of the chip U2.
7. The ac-dc current probe circuit according to claim 5, wherein: the input and output module is connected with the central instruction processing module through a pin 1 of the chip U4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021322359.8U CN212905115U (en) | 2020-07-07 | 2020-07-07 | AC/DC current probe circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021322359.8U CN212905115U (en) | 2020-07-07 | 2020-07-07 | AC/DC current probe circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212905115U true CN212905115U (en) | 2021-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021322359.8U Active CN212905115U (en) | 2020-07-07 | 2020-07-07 | AC/DC current probe circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212905115U (en) |
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2020
- 2020-07-07 CN CN202021322359.8U patent/CN212905115U/en active Active
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