CN104678861A - Circuit with adjustable threshold voltage for collecting digital signals - Google Patents
Circuit with adjustable threshold voltage for collecting digital signals Download PDFInfo
- Publication number
- CN104678861A CN104678861A CN201510088845.5A CN201510088845A CN104678861A CN 104678861 A CN104678861 A CN 104678861A CN 201510088845 A CN201510088845 A CN 201510088845A CN 104678861 A CN104678861 A CN 104678861A
- Authority
- CN
- China
- Prior art keywords
- circuit
- digital signal
- resistance
- threshold voltage
- adjustable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
The invention relates to a circuit with adjustable threshold voltage for collecting digital signals. The circuit comprises a sampling circuit and a preprocessing circuit which are connected in sequence, wherein the preprocessing circuit is used for preprocessing the digital signals input from the input end of the preprocessing circuit and transmitting the preprocessed digital signals to the sampling circuit through the output end of the preprocessing circuit; the sampling circuit is used for receiving the preprocessed digital signals transmitted through the output end of the preprocessing circuit and sampling the preprocessed digital signals; the sampling circuit is a programmable device (such as FPGA, CPLD, DSP and CPU) at an I/O port with a differential input structure. The adjustable circuit has the benefits that the sampling precision is improved, and the digital signals with different voltage standards can be measured due to the fact that the threshold voltage is continuously adjustable; the circuit cost is greatly reduced; a first resistor R1 and a second resistor R2 additionally arranged in the preprocessing circuit can be used for carrying out scale reduction on the voltages of the input digital signals, and an additionally arranged clamping diode can be used for effectively protecting the rear sampling circuit.
Description
Technical field
The invention belongs to electronic applications, being specifically related to a kind of for gathering the adjustable circuit of digital signal threshold voltage.
Background technology
Digital signal samples circuit is widely used in various electronic equipment, especially in Data Acquisition Design and electronic measuring instrument.Digital signal samples circuit is directly used to carry out the collection of data in the equipment such as logic analysis, current detecting instrument, then process data, the simulating signal surveying instruments such as oscillograph carry out data sampling and processing through digital signal samples circuit after simulating signal being converted to digital signal by the analog-to-digital conversion module of front end again.
The digital signal samples circuit adopted in existing logic analyser and oscillograph has two kinds, the first is the circuit adopting fixed threshold, the digital signal (i.e. the digital signal 4 of pre-process circuit 1 input end) gathered is needed to process through pre-process circuit 1, eliminate the sample circuit 2 that (i.e. the pretreated digital signal 5 of pre-process circuit) after clutter pass to fixed threshold to sample, as shown in Figure 1, need the digital signal gathered after pre-process circuit 1 filtering clutter, pass to sample circuit 2, sample circuit 2 is sample circuits that threshold value is fixed.The second is in order to expand the voltage range of sampling circuit samples signal, improve the degree of accuracy of sampling circuit samples signal, add comparator circuit 3, as shown in Figure 2, digital signal is after pre-process circuit 1, process through comparator circuit 3, the signal after comparator circuit 3 processes just passes to sample circuit 2 again.Here the comparative voltage of comparator circuit 3 is controlled by signal, can adjust according to the level of supplied with digital signal, to adapt to the input signal of different voltage.
The first adopts pre-process circuit to be fixed the scheme of the circuit of threshold value, circuit is simple, cost is lower, mainly be used in some low side logic analysers and low side data acquisition system (DAS), because threshold value can not adjust, so the signal voltage range that this sample circuit can be sampled is more limited, relatively stricter to the voltage request of measuring-signal, the voltage range of measurement is smaller.The second sample circuit is mainly used in the data acquisition equipment of high side logic analyser and some high complexities, improve the problem that the signal voltage range of the first sample circuit measurement is little, every road input signal all increases a comparator circuit, the signal voltage range that can sample can be increased by the comparative voltage changing comparator circuit, but this conceptual design is complicated, and because of the comparator circuit that every road input signal all needs increase by independent, independently high-speed comparator has higher cost, and entire system cost is significantly improved.
Summary of the invention
In order to solve the problems referred to above that prior art exists, the invention provides low a kind of for gathering the adjustable circuit of digital signal threshold voltage of the high and cost of sampling precision.
The technical solution adopted in the present invention is:
A kind of for gathering the adjustable circuit of digital signal threshold voltage, it comprises interconnective pre-process circuit and sample circuit, described pre-process circuit is used for the digital signal inputted from its input end to carry out pre-service, and by its output terminal by pretreated digital signal transfers extremely described sample circuit; Described sample circuit receives the pretreated digital signal that described pre-process circuit output terminal transmits, and samples to pretreated digital signal; Described sample circuit is the Programmable Logic Controller of the I/O port with differential input structure; Described have contrast potential with input on the I/O port of differential input structure.Described Programmable Logic Controller comprises FPGA, CPLD, DSP and CPU etc.
The I/O port of described differential input structure is have the single ended interfaces of differential input structure or have the differential interface of differential input structure.There is the single ended interfaces of differential input structure as HSTL, SSTL etc.; There is the differential interface of differential input structure as LVDS, LVPECL etc.
One of them differential input end of the I/O port of described differential input structure is connected with adjustable circuit of output voltage, and described contrast potential is provided by described adjustable circuit of output voltage.
Described adjustable circuit of output voltage is digital regulation resistance, analog-digital chip and based on a kind of in the D/A converting circuit of PWM.
A kind of mode during the input signal of described adjustable circuit of output voltage adopts single signal wire and has parallel bus or universal serial bus that read-write sequence requires is transmitted.
Described pre-process circuit comprises the first resistance, the second resistance, the 3rd resistance, electric capacity, the first diode and the second diode, described 3rd resistance and with described capacitances in series after, be parallel to the two ends of described first resistance, the input end of described second resistance is connected with the output terminal of described first resistance, the other end ground connection of described second resistance, described first diodes in parallel is to the two ends of described second resistance, one end of described second diode is connected with power supply, and the other end of described second diode is connected with the output terminal of described first resistance.
Described first diode and the second diode are clamp diode.
The digital signal inputted from its input end is carried out the clutter that pre-service comprises digital signal described in filtering by described pre-process circuit.
Beneficial effect of the present invention is:
1 the first adopts the scheme of sample circuit of fixed threshold to compare with in prior art, invention increases sampling precision, due to threshold voltage continuously adjustabe, can measure the digital signal of different voltage standard.
2 and prior art in the second in order to expand the voltage range of sampling circuit samples signal, the scheme adding comparator circuit is compared, and the present invention greatly reduces circuit cost, saves the area of pcb board.
3, pre-process circuit of the present invention, the pre-process circuit compared to existing technology, adds the bleeder circuit of the first resistance R1 and the second resistance R2, adds clamp diode.The the first resistance R1 wherein increased and the second resistance R2 can carry out scale smaller to the voltage of the digital signal of input; make it to be more suitable for sample circuit collection; the clamp diode increased can available protecting sample circuit below, prevents because the reason such as external signal overtension or electrostatic punctures the I/O port of sample circuit.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the first sample circuit in prior art;
Fig. 2 is the schematic diagram of the second sample circuit in prior art;
Fig. 3 is the schematic diagram that one of them differential input end of a kind of I/O port for gathering differential input structure in the adjustable circuit of digital signal threshold voltage of the present invention is connected with adjustable circuit of output voltage;
Fig. 4 is the schematic diagram that one of them differential input end of a kind of I/O port for gathering differential input structure in the adjustable circuit of digital signal threshold voltage of the present invention is connected with external input signal;
Fig. 5 is a kind of schematic diagram for gathering pre-process circuit in the adjustable circuit of digital signal threshold voltage of the present invention.
In figure: 1, pre-process circuit; 2, sample circuit; 3, comparator circuit; 4, the digital signal of pre-process circuit input end; 5, the pretreated digital signal of pre-process circuit; 6, adjustable circuit of output voltage; 7, contrast potential; 8, external input signal.
Embodiment
Embodiment 1
As shown in Figure 3, the invention provides a kind of for gathering the adjustable circuit of digital signal threshold voltage, it comprises interconnective pre-process circuit 1 and sample circuit 2, described pre-process circuit 1 carries out pre-service for the digital signal 4 will inputted from its input end, and by its output terminal, pretreated digital signal 5 is passed to described sample circuit 2; Wherein pre-service comprises the clutter of digital signal described in filtering.Described sample circuit 2 receives the pretreated digital signal 5 that described pre-process circuit 1 output terminal transmits, and samples to pretreated digital signal 5; Described sample circuit 2 is the fpga chip of the I/O port with differential input structure, and described fpga chip can also change CPLD chip, dsp chip or CPU etc. into.Described have contrast potential with input on the I/O port of differential input structure.The I/O port of described differential input structure is have the single ended interfaces of differential input structure or have the differential interface of differential input structure.There is the single ended interfaces of differential input structure as HSTL, SSTL etc.; There is the differential interface of differential input structure as LVDS, LVPECL etc.One of them differential input end of the I/O port of described differential input structure is connected with adjustable circuit of output voltage 6, and described adjustable circuit of output voltage 6 is digital regulation resistance.A kind of mode during the input signal of described adjustable circuit of output voltage 6 adopts single signal wire and has parallel bus or universal serial bus that read-write sequence requires is transmitted.Described contrast potential 7 is provided by described adjustable circuit of output voltage 6.
Pre-process circuit 1 input end input digital signal 4 be more convenient for after pre-process circuit 1 filtering clutter sample circuit 2 gather digital signal, then be passed to sample circuit 2 namely with differential input structure I/O port fpga chip, it is one of them differential input end input contrast potential 7 of the I/O port of differential input structure by adjustable circuit of output voltage 6, the adjustable extent of contrast potential 7 is 0 ~ Vcc (the I/O power supply of fpga chip), occurrence is determined by use scenes, as Acquisition Circuit needs the signal that the digital signal (i.e. the pretreated digital signal of pre-process circuit) gathered is 1.5V, contrast potential 7 can be adjusted to 0.75V, as Acquisition Circuit needs the digital signal gathered to be 3.3V, contrast potential 7 can be adjusted to 1.5V etc., the voltage realizing one of them differential input end of the I/O port of differential input structure is adjustable, and then the input threshold voltage of fpga chip can be adjusted, realize adjustment threshold voltage, adapt to the sampling of the digital signal of different voltage input.Wherein the digital signal of pre-process circuit 1 and pre-process circuit input end can be all multiple.
In addition adjustable circuit of output voltage 6 also can be connected with external input signal 8 by fpga chip and replaces, and as shown in Figure 4, also can realize technical scheme of the present invention.
The first adopts the scheme of the sample circuit of fixed threshold to compare with in prior art in the present invention, invention increases sampling precision, due to threshold voltage continuously adjustabe, can measure the digital signal of different voltage standard.
In the present invention and prior art, the second is in order to expand the voltage range of sample circuit 2 sampled signal, and the scheme adding comparator circuit 3 is compared, and the present invention greatly reduces circuit cost, saves the area of pcb board.
Described fpga chip can also change CPLD chip, dsp chip or CPU etc. into.
The I/O port of described differential input structure is have the single ended interfaces of differential input structure or have the differential interface of differential input structure.There is the single ended interfaces of differential input structure as HSTL, SSTL etc.; There is the differential interface of differential input structure as LVDS, LVPECL etc.
Embodiment 2
The present embodiment is on the basis of embodiment 1, improvement is proposed to pre-process circuit 1, specifically as shown in Figure 5, described pre-process circuit 1 comprises the first resistance R1, the second resistance R2, the 3rd resistance R3, electric capacity C1, the first diode D1 and the second diode D2, and the first diode D1 and the second diode D2 is clamp diode.Described 3rd resistance R3 and after connecting with described electric capacity C1, be parallel to the two ends of described first resistance R1, the input end of described second resistance R2 is connected with the output terminal of described first resistance R1, the other end ground connection of described second resistance R2, described first diode D1 is parallel to the two ends of described second resistance R2, one end of described second diode D2 is connected with power supply, and the other end of described second diode D2 is connected with the output terminal of described first resistance R1.
Pre-process circuit 1 of the present invention, the pre-process circuit 1 compared to existing technology, adds the bleeder circuit of the first resistance R1 and the second resistance R2, adds clamp diode.The the first resistance R1 wherein increased and the second resistance R2 can carry out scale smaller to the voltage of the digital signal of input, is specially, and when the voltage of the digital signal inputted is DC voltage, output voltage Vo is
(wherein, Vo is output voltage, and Vi is input voltage, and R1 is the resistance of the first resistance R1, and R2 is the resistance of the second resistance R2), the value of adjustment R1, R2 can change the ratio of voltage scaling.Such as, R1=R2, output voltage is 1/2 of input voltage, thus the voltage of the output signal of adjustment pre-process circuit is within the voltage range of the input signal of sample circuit, make it to be more suitable for sample circuit collection, the clamp diode increased can available protecting sample circuit below, prevent because the pin that the reason such as external signal overtension or electrostatic punctures the fpga chip of sample circuit is greater than Vcc+VF (the forward direction forward voltage of diode) when the output voltage of pre-process circuit, D2 conducting, makes voltage clamping in Vcc+VF; When the output voltage of pre-process circuit is less than-VF, D1 conducting, makes voltage clamping in-VF.By the clamping action of D1, D2, make the output voltage of pre-process circuit within the scope of-VF ~ Vcc+VF, thus the input port of protection sample circuit.
In describing the invention; it will be appreciated that; term " " center ", " longitudinal direction ", " transverse direction ", "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", " outward " etc. instruction orientation or position relationship be based on orientation shown in the drawings or position relationship; be only the present invention for convenience of description and simplified characterization; instead of instruction or imply indication device or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limiting the scope of the invention.
The present invention is not limited to above-mentioned preferred forms; anyone can draw other various forms of products under enlightenment of the present invention; no matter but any change is done in its shape or structure; every have identical with the application or akin technical scheme, all drops within protection scope of the present invention.
Claims (8)
1. one kind for gathering the adjustable circuit of digital signal threshold voltage, it is characterized in that: it comprises the pre-process circuit and sample circuit that connect in turn, described pre-process circuit is used for the digital signal inputted from its input end to carry out pre-service, and by its output terminal by pretreated digital signal transfers extremely described sample circuit; Described sample circuit receives the pretreated digital signal that described pre-process circuit output terminal transmits, and samples to pretreated digital signal; Described sample circuit is the Programmable Logic Controller of the I/O port with differential input structure; Described have contrast potential with input on the I/O port of differential input structure.
2. according to claim 1 a kind of for gathering the adjustable circuit of digital signal threshold voltage, it is characterized in that: the I/O port of described differential input structure is have the single ended interfaces of differential input structure or have the differential interface of differential input structure.
3. according to claim 2 a kind of for gathering the adjustable circuit of digital signal threshold voltage, it is characterized in that: one of them differential input end of the I/O port of described differential input structure is connected with adjustable circuit of output voltage, and described contrast potential is provided by described adjustable circuit of output voltage.
4. according to claim 3 a kind of for gathering the adjustable circuit of digital signal threshold voltage, it is characterized in that: described adjustable circuit of output voltage is digital regulation resistance, analog-digital chip and based on the one in the D/A converting circuit of PWM.
5. according to claim 3 a kind of for gathering the adjustable circuit of digital signal threshold voltage, it is characterized in that: a kind of mode during the input signal of described adjustable circuit of output voltage adopts single signal wire and has parallel bus or universal serial bus that read-write sequence requires is transmitted.
6. a kind of for gathering the adjustable circuit of digital signal threshold voltage according to claim 4 or 5, it is characterized in that: described pre-process circuit comprises the first resistance, second resistance, 3rd resistance, electric capacity, first diode and the second diode, described 3rd resistance and with described capacitances in series after, be parallel to the two ends of described first resistance, the input end of described second resistance is connected with the output terminal of described first resistance, the other end ground connection of described second resistance, described first diodes in parallel is to the two ends of described second resistance, one end of described second diode is connected with power supply, the other end of described second diode is connected with the output terminal of described first resistance.
7. according to claim 6 a kind of for gathering the adjustable circuit of digital signal threshold voltage, it is characterized in that: described first diode and described second diode are clamp diode.
8. according to claim 1 a kind of for gathering the adjustable circuit of digital signal threshold voltage, it is characterized in that: the digital signal inputted from its input end is carried out the clutter that pre-service comprises digital signal described in filtering by described pre-process circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510088845.5A CN104678861A (en) | 2015-02-26 | 2015-02-26 | Circuit with adjustable threshold voltage for collecting digital signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510088845.5A CN104678861A (en) | 2015-02-26 | 2015-02-26 | Circuit with adjustable threshold voltage for collecting digital signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104678861A true CN104678861A (en) | 2015-06-03 |
Family
ID=53314100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510088845.5A Pending CN104678861A (en) | 2015-02-26 | 2015-02-26 | Circuit with adjustable threshold voltage for collecting digital signals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104678861A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106383466A (en) * | 2016-09-28 | 2017-02-08 | 卡斯柯信号有限公司 | Threshold-adjustable security signal acquisition device and method |
| CN106559062A (en) * | 2016-11-29 | 2017-04-05 | 青岛金思特电子有限公司 | Logic analyser threshold voltage adjustment circuit |
| CN109710273A (en) * | 2018-12-07 | 2019-05-03 | 天津津航计算技术研究所 | A kind of DSP2407A serial ports is in line writing circuit |
| CN109905118A (en) * | 2017-12-08 | 2019-06-18 | 武汉精立电子技术有限公司 | A kind of device generating C_PHY signal based on single SSTL circuit |
| CN114382715A (en) * | 2020-10-20 | 2022-04-22 | 南京绿芯集成电路有限公司 | Fan control device with power-saving mode and start delay setting |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101125080A (en) * | 2007-09-25 | 2008-02-20 | 重庆大学 | Increment magnifying type signal measuring device using for impedance imaging |
| CN101819246A (en) * | 2010-04-27 | 2010-09-01 | 重庆大学 | Discharge capacity monitoring and collecting method, device and system for ultrahigh frequency local discharge |
| CN102749506A (en) * | 2012-07-10 | 2012-10-24 | 上海市电力公司 | Direct current digital signal sampling circuit |
| CN202614836U (en) * | 2012-03-21 | 2012-12-19 | 西北工业大学 | Wide voltage data acquisition device |
| CN204515414U (en) * | 2015-02-26 | 2015-07-29 | 邓珊珊 | A kind of for gathering the adjustable circuit of digital signal threshold voltage |
-
2015
- 2015-02-26 CN CN201510088845.5A patent/CN104678861A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101125080A (en) * | 2007-09-25 | 2008-02-20 | 重庆大学 | Increment magnifying type signal measuring device using for impedance imaging |
| CN101819246A (en) * | 2010-04-27 | 2010-09-01 | 重庆大学 | Discharge capacity monitoring and collecting method, device and system for ultrahigh frequency local discharge |
| CN202614836U (en) * | 2012-03-21 | 2012-12-19 | 西北工业大学 | Wide voltage data acquisition device |
| CN102749506A (en) * | 2012-07-10 | 2012-10-24 | 上海市电力公司 | Direct current digital signal sampling circuit |
| CN204515414U (en) * | 2015-02-26 | 2015-07-29 | 邓珊珊 | A kind of for gathering the adjustable circuit of digital signal threshold voltage |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106383466A (en) * | 2016-09-28 | 2017-02-08 | 卡斯柯信号有限公司 | Threshold-adjustable security signal acquisition device and method |
| CN106383466B (en) * | 2016-09-28 | 2024-02-13 | 卡斯柯信号有限公司 | Threshold-adjustable safety signal acquisition device and method |
| CN106559062A (en) * | 2016-11-29 | 2017-04-05 | 青岛金思特电子有限公司 | Logic analyser threshold voltage adjustment circuit |
| CN106559062B (en) * | 2016-11-29 | 2019-08-30 | 青岛金思特电子有限公司 | Logic analyser threshold voltage adjustment circuit |
| CN109905118A (en) * | 2017-12-08 | 2019-06-18 | 武汉精立电子技术有限公司 | A kind of device generating C_PHY signal based on single SSTL circuit |
| CN109905118B (en) * | 2017-12-08 | 2023-03-28 | 武汉精立电子技术有限公司 | Device for generating C _ PHY signal based on single SSTL circuit |
| CN109710273A (en) * | 2018-12-07 | 2019-05-03 | 天津津航计算技术研究所 | A kind of DSP2407A serial ports is in line writing circuit |
| CN114382715A (en) * | 2020-10-20 | 2022-04-22 | 南京绿芯集成电路有限公司 | Fan control device with power-saving mode and start delay setting |
| CN114382715B (en) * | 2020-10-20 | 2024-01-12 | 南京绿芯集成电路有限公司 | Fan control device with power saving mode and start delay setting |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104678861A (en) | Circuit with adjustable threshold voltage for collecting digital signals | |
| CN201490697U (en) | Three-phase current detection and protection circuit | |
| US20140084963A1 (en) | Passive capture adapter circuit for sensing signals of a high-speed circuit | |
| CN201773140U (en) | Alternating current and direct current hybrid electric field intensity measuring device | |
| CN205049678U (en) | Short circuit testing arrangement is opened to camera module | |
| CN104502679A (en) | Bidirectional current detection circuit | |
| CN204515414U (en) | A kind of for gathering the adjustable circuit of digital signal threshold voltage | |
| CN105785131A (en) | Testing device and method for low ohm chip resistors | |
| CN107462767A (en) | plasma probe measurement and control system | |
| CN106226601A (en) | A kind of detection device of weak current automatization insulation resistance | |
| CN206609901U (en) | A kind of PCIE channel loss test tool | |
| CN107911119A (en) | A kind of gathered data processing system applied to security monitoring device | |
| CN211234441U (en) | Double-shaft gyroscope inertial sensor | |
| CN109633243B (en) | Beam signal peak amplitude accurate extraction method based on multiphase sampling | |
| CN205384360U (en) | BMS current parameter calibrating device | |
| CN104714127B (en) | The anti-traction current interference test device of track circuit based on virtual instrument | |
| CN203812008U (en) | Analog signal collector | |
| CN110146739A (en) | A kind of power-measuring device and method | |
| CN110988651A (en) | Drive acquisition device and detection device of electronic circuit product | |
| CN104931782A (en) | Remote asynchronous power frequency signal phase difference measurement method and system | |
| CN105806406A (en) | Network collecting and testing system | |
| CN205750397U (en) | A kind of high speed data acquisition system based on ARM single-chip microcomputer | |
| CN103675470A (en) | N*M dimension resistor network measuring device | |
| CN106124865A (en) | The measuring method of the capacitance of differential capacitance and device | |
| CN207817691U (en) | A kind of data collecting card |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150603 |
|
| RJ01 | Rejection of invention patent application after publication |