CN211669266U - Multichannel waveform acquisition device - Google Patents
Multichannel waveform acquisition device Download PDFInfo
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- CN211669266U CN211669266U CN201921973256.5U CN201921973256U CN211669266U CN 211669266 U CN211669266 U CN 211669266U CN 201921973256 U CN201921973256 U CN 201921973256U CN 211669266 U CN211669266 U CN 211669266U
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Abstract
The utility model discloses a multichannel waveform acquisition device, including switch module, waveform acquisition channel module and FPGA chip, the quantity of waveform acquisition channel module is a plurality of, channel relay accepts the control signal that switch module goes out makes channel relay opens, and the waveform that awaits measuring gets into waveform acquisition channel module, process operational amplifier follows circuit unit, improves the input impedance who is surveyed the waveform, through the electronic pin chip turns into digital signal with the waveform that awaits measuring, and transmits to the FPGA chip adopts fixed high frequency clock storage digital signal is read by the host computer behind the digital signal, handle and operate, hardware simple structure, the integrated level is high, and is more directly perceived and nimble to the collection and the processing of data.
Description
Technical Field
The utility model relates to a semiconductor test technical field especially relates to a multichannel waveform acquisition device.
Background
At present, waveform time parameters are measured by a time measuring unit automatically according to a measuring gear and a measuring function mode set by a user, and measuring results are output.
Disclosure of Invention
An object of the utility model is to provide a multichannel waveform acquisition device, hardware structure is simple, and the integrated level is high, and is more directly perceived and nimble to the collection and the processing of data.
In order to achieve the above object, the utility model provides a multi-channel waveform acquisition device, which comprises a switch module, a waveform acquisition channel module and an FPGA chip, wherein the switch module, the waveform acquisition channel module and the FPGA chip are electrically connected in sequence, the number of the waveform acquisition channel modules is multiple,
the switch module is used for sending a control signal to open the waveform acquisition channel module;
the waveform acquisition channel module is used for receiving the control signal, acquiring a waveform to be detected, improving the input impedance of the waveform to be detected, converting the waveform to be detected into a digital signal and transmitting the digital signal to the FPGA chip;
and the FPGA chip is used for receiving the digital signal and storing the digital signal by using a fixed high-frequency clock.
The waveform acquisition channel module comprises a channel relay for receiving the control signal and controlling the waveform to be detected to enter the waveform acquisition channel module.
The waveform acquisition channel module further comprises an operational amplifier following circuit unit which is used for receiving the waveform to be detected transmitted by the channel relay, improving the input impedance of the waveform to be detected and completely transmitting the waveform to be detected to the FPGA chip.
The waveform acquisition channel module further comprises an electronic pin chip which is used for receiving the waveform to be detected transmitted by the operational amplifier following circuit unit, converting the waveform to be detected into a digital signal and transmitting the digital signal to the FPGA chip.
The electronic pin chip comprises an analog-to-digital converter which is used for converting the waveform to be detected into a digital signal.
The electronic pin chip further comprises a comparator for comparing the digital signal with a set value and outputting a high level or a low level.
The multichannel waveform acquisition device further comprises an upper computer which is used for reading the digital signals stored by the FPGA chip and processing and operating according to the digital signals.
The utility model discloses a multichannel waveform acquisition device, including switch module, waveform acquisition channel module and FPGA chip, the quantity of waveform acquisition channel module is a plurality of, switch module sends control signal, makes waveform acquisition channel module opens, and the waveform that awaits measuring gets into waveform acquisition channel module improves after the input impedance, can be with the complete accurate measurement of the waveform that awaits measuring, turns into digital signal with the waveform that awaits measuring, and the output is high level or low level, and transmit to the FPGA chip adopts fixed high frequency clock storage digital signal is read by the host computer behind the digital signal, handle and the operation, hardware simple structure, the integrated level is high, and is more directly perceived and nimble to the collection and the processing of data.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the multi-channel waveform collecting device provided by the present invention.
The device comprises a 100-multichannel waveform acquisition device, a 1-switch module, a 2-waveform acquisition channel module, a 3-FPGA chip, a 4-upper computer, a 21-channel relay, a 22-operational amplifier following circuit unit, a 23-electronic pin chip, a 231-analog-to-digital converter and a 232-comparator.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
Referring to fig. 1, the present invention provides a multi-channel waveform collecting device 100, wherein the multi-channel waveform collecting device 100 includes a switch module 1, a waveform collecting channel module 2 and an FPGA (field programmable gate array) chip 3, the switch module 1, the waveform collecting channel module 2 and the FPGA chip 3 are electrically connected in sequence, the number of the waveform collecting channel modules 2 is plural,
the switch module 1 is used for sending a control signal to open the waveform acquisition channel module 2;
the waveform acquisition channel module 2 is used for receiving the control signal, acquiring a waveform to be detected, improving the input impedance of the waveform to be detected, converting the waveform to be detected into a digital signal and transmitting the digital signal to the FPGA chip 3;
and the FPGA chip 3 is used for receiving the digital signal and storing the digital signal by a fixed high-frequency clock.
In this embodiment, the multi-channel waveform collecting device 100 includes a switch module 1, a waveform collecting channel module 2 and an FPGA chip 3, the switch module 1, the waveform collecting channel module 2 and the FPGA chip 3 are sequentially electrically connected, the number of the waveform collecting channel modules 2 is plural, the plural waveform collecting channel modules 2 are respectively electrically connected to the FPGA chip, the switch module 1 sends out a control signal to open the waveform collecting channel module 2, the waveform to be measured enters the waveform collecting channel module 2, then the input impedance of the waveform to be measured is increased, the influence of the measuring unit on the waveform to be measured is reduced to a small enough value, the waveform to be measured can be completely and accurately sent to the measuring unit, then the waveform to be measured is converted into a digital signal through analog-to-digital conversion and transmitted to the FPGA chip 3, the FPGA chip 3 does not process the digital signal, only the fixed high-frequency clock is used for storing the digital signals, the hardware structure is simple, the integration level is high, and the data acquisition is more visual and flexible.
Further, the waveform acquisition channel module 2 includes a channel relay 21, which is used for receiving the control signal and controlling the waveform to be detected to enter the waveform acquisition channel module 2.
In this embodiment, the waveform acquisition channel module 2 includes a channel relay 21, and the channel relay 21 receives a control signal sent by the switch module 1, so that the channel relay 21 is turned on, and a waveform to be detected enters the waveform acquisition channel module 2 to flexibly control the on-off of a channel.
Further, the waveform acquisition channel module 21 further includes an operational amplifier follower circuit unit 22, which is used for receiving the waveform to be detected transmitted by the channel relay 21, increasing the input impedance of the waveform to be detected, and transmitting the waveform to be detected to the FPGA chip 3 completely.
In this embodiment, the waveform collection channel module 21 further includes an operational amplifier follower circuit unit 22, which receives the waveform to be measured entering the waveform collection channel module 2 through the channel relay 21, improves the input impedance, and reduces the influence of the measurement unit on the waveform to be measured to a small enough, so that all waveforms to be measured passing through the operational amplifier follower circuit unit 22 can be completely and accurately sent to the measurement unit even if the driving capability of the waveform to be measured is small, and the measurement result is more accurate, and reflects the time information of the original waveform faithfully.
Further, the waveform acquisition channel module 2 further includes an electronic pin chip 23, which is configured to receive the waveform to be detected transmitted by the operational amplifier following circuit unit 22, convert the waveform to be detected into a digital signal, and transmit the digital signal to the FPGA chip 3.
In this embodiment, the waveform acquisition channel module 2 further includes an electronic pin chip 23, and the electronic pin chip 23 receives the waveform to be detected transmitted by the operational amplifier following circuit unit 22, converts the waveform to be detected into a digital signal, and transmits the digital signal to the FPGA chip 3.
Further, the electronic pin chip 23 includes an analog-to-digital converter 231, which is used for converting the waveform to be tested into a digital signal.
In this embodiment, the electronic pin chip 23 includes an analog-to-digital converter 231, and the analog-to-digital converter 231 converts the waveform to be detected received by the electronic pin chip 23 into a digital signal, which is convenient for the storage of the FPGA chip 3.
Further, the electronic pin chip 23 further includes a comparator 232, which is used for comparing the digital signal with a set value and outputting a high level or a low level.
In this embodiment, the electronic pin chip 23 further includes a comparator 232, which compares the digital signal transmitted by the analog-to-digital converter 231 with a set value, and if the digital signal is greater than the set value, the electronic pin chip 23 outputs a high level, and if the digital signal is less than the set value, the electronic pin chip outputs a low level, so as to complete the conversion of the waveform to be measured.
Further, the multichannel waveform acquisition device 100 further comprises an upper computer 4 for reading the digital signals stored in the FPGA chip 3 and performing processing and operation according to the digital signals.
In this embodiment, the multichannel waveform acquisition device 100 further includes an upper computer 4, which reads the digital signals stored in the FPGA chip 3, and processes and calculates the digital signals according to the test requirements, so that the data processing is more intuitive and flexible.
The utility model discloses a multichannel waveform acquisition device 100, including switch module 1, waveform acquisition channel module 2 and FPGA chip 3, the quantity of waveform acquisition channel module 2 is a plurality of, switch module 1 sends control signal, channel relay 21 accepts the control signal that switch module 1 sent, makes channel relay 21 open, and the waveform that awaits measuring gets into waveform acquisition channel module 2, through operational amplifier follow circuit unit 22, improves the input impedance of the waveform that awaits measuring, through electronic pin chip 23 with await measuring the waveform conversion digital signal, and compare output high level or low level with the setting value, and transmit to FPGA chip 3, adopt fixed high frequency clock to store the digital signal, read by host computer 4 after the digital signal, handle and operate according to the test requirement, the hardware structure is simple, the integration level is high, and the data acquisition and processing are more visual and flexible.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (7)
1. A multi-channel waveform acquisition device is characterized by comprising a switch module, a waveform acquisition channel module and an FPGA chip, wherein the switch module, the waveform acquisition channel module and the FPGA chip are electrically connected in sequence, the number of the waveform acquisition channel modules is multiple,
the switch module is used for sending a control signal to open the waveform acquisition channel module;
the waveform acquisition channel module is used for receiving the control signal, acquiring a waveform to be detected, improving the input impedance of the waveform to be detected, converting the waveform to be detected into a digital signal and transmitting the digital signal to the FPGA chip;
and the FPGA chip is used for receiving the digital signal and storing the digital signal by using a fixed high-frequency clock.
2. The multi-channel waveform acquisition device as claimed in claim 1, wherein the waveform acquisition channel module comprises a channel relay for receiving the control signal and controlling the waveform to be detected to enter the waveform acquisition channel module.
3. The multi-channel waveform acquisition device according to claim 2, wherein the waveform acquisition channel module further comprises an operational amplifier follower circuit unit, which is used for receiving the waveform to be detected transmitted by the channel relay, increasing the input impedance of the waveform to be detected, and transmitting the waveform to be detected to the FPGA chip completely.
4. The multi-channel waveform acquisition device according to claim 3, wherein the waveform acquisition channel module further comprises an electronic pin chip for receiving the waveform to be detected transmitted by the operational amplifier follower circuit unit, converting the waveform to be detected into a digital signal, and transmitting the digital signal to the FPGA chip.
5. The multi-channel waveform acquisition device of claim 4 wherein the electronic pin chip includes an analog-to-digital converter for converting the waveform under test into a digital signal.
6. The multi-channel waveform sampling device of claim 5 wherein the electronic pin chip further comprises a comparator for comparing the digital signal with a set value to output a high level or a low level.
7. The multi-channel waveform acquisition device according to claim 6, further comprising an upper computer for reading the digital signals stored in the FPGA chip and performing processing and operation according to the digital signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921973256.5U CN211669266U (en) | 2019-11-15 | 2019-11-15 | Multichannel waveform acquisition device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921973256.5U CN211669266U (en) | 2019-11-15 | 2019-11-15 | Multichannel waveform acquisition device |
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| CN211669266U true CN211669266U (en) | 2020-10-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113671357A (en) * | 2021-10-21 | 2021-11-19 | 南京宏泰半导体科技有限公司 | Floating time measuring device |
-
2019
- 2019-11-15 CN CN201921973256.5U patent/CN211669266U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113671357A (en) * | 2021-10-21 | 2021-11-19 | 南京宏泰半导体科技有限公司 | Floating time measuring device |
| CN113671357B (en) * | 2021-10-21 | 2022-02-15 | 南京宏泰半导体科技有限公司 | Floating time measuring device |
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Address after: 210000 floor 2, building 26, South Park, Jiangsu Kecheng science and Technology Industrial Park, No. 19, Lanhua Road, Pukou District, Nanjing, Jiangsu Province Patentee after: Nanjing Hongtai Semiconductor Technology Co.,Ltd. Address before: Room b2411, 24 / F, block B, Kechuang headquarters building, Kechuang Plaza, 320 pubin Avenue, Jiangpu street, Pukou District, Nanjing City, Jiangsu Province, 211800 Patentee before: Nanjing Hongtai Semiconductor Technology Co.,Ltd. |
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