CN1635385A - Electromagnetic interference detecting device - Google Patents
Electromagnetic interference detecting device Download PDFInfo
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- CN1635385A CN1635385A CN 200310113157 CN200310113157A CN1635385A CN 1635385 A CN1635385 A CN 1635385A CN 200310113157 CN200310113157 CN 200310113157 CN 200310113157 A CN200310113157 A CN 200310113157A CN 1635385 A CN1635385 A CN 1635385A
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Abstract
This invention provides an electromagnetism interference-detecting device, which comprises one detector, one signal output part and one signal receiving part. The detector contacts the noisy signal source to receive one noisy signal by single point contacting means. The signal output part is connected to the detector and outputs the signals relative to the noisy signals. When the detector contacts the noisy signal source, the signals are received by detector and are output to the signal receiving part.
Description
Technical field
The present invention relates to the electromagnetic interference (EMI) sniffer, particularly have the electromagnetic interference (EMI) sniffer of single-point detecting function.
Background technology
Generally speaking, electronic product is before dispatching from the factory, and (ElectromagneticInterference EMI) detects, and the side is specification product all must to pass through electromagnetic interference (EMI).Traditional electromagnetic interference (EMI) detecting structure as shown in Figure 5.Traditional electromagnetic interference (EMI) detecting structure 50 is made up of a frequency spectrograph 56, an antenna 55 and a circular probe 54.The wireless noise signal of high frequency that circular probe 54 is produced in order to receive electronic product to be measured 58, and export wireless signal accordingly.Electronic product 58 for example is a LCD.Antenna 55 is electrically connected with frequency spectrograph 56, and is sent to frequency spectrograph 56 in order to the wireless signal that will be received.56 of frequency spectrographs can be shown in the pairing spectrogram of this wireless signal on the screen of frequency spectrograph 56, observe the size of the wireless noise signal of high frequency of electronic product to be measured for the tester.
Yet traditional circular probe 54 only can detect 58 zones that may produce the wireless noise signal of high frequency of electronic product to be measured, and can't accurately detect the wireless noise signal of high frequency by where producing.When electronic product to be measured 58 was a circuit board, it was which circuit node from the circuit board produces that traditional circular probe 54 can't detect the wireless noise signal of this high frequency at all actually.So, when the design that will remodify circuit board when reducing the wireless noise signal of high frequency, the deviser only can use the mode of hit-and-miss method (try and error), revises circuit board, detects by electromagnetic interference (EMI) in the hope of making circuit board.Yet such practice is quite consuming time.Therefore, how detecting the wireless noise signal of the high frequency source on the circuit board apace, and find out the method for eliminating this noise signal, to save the test duration, reduce cost, is instant problem.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of electromagnetic interference (EMI) sniffer,, and apace the noise signal generation reason at this place is analyzed and eliminated in order to the also noise signal of single-point detection correctly generation place rapidly.
According to purpose of the present invention, a kind of electromagnetic interference (EMI) sniffer is proposed, this device comprises a probe, a signal efferent and a signal receiving portion.Probe with the mode contact noise signal source of single-point contact to receive a noise signal.The signal efferent is connected with probe, and output is corresponding to the signal of this noise signal.When probe contact noise signal source, noise signal is received by probe, by the signal efferent, outputs signal to the signal receiving portion again.
According to purpose of the present invention, reintroduce a kind of electromagnetic interference (EMI) sniffer, comprising: the first single-point probe, the second single-point probe, noise signal straining element, signal efferent and signal receiving portion.The first single-point probe and the second single-point probe, in order to selective exposure noise signal source to receive noise signal.The noise signal straining element is connected in series with the second single-point probe, in order to filter the noise signal that is received by the second single-point probe.The signal efferent is connected respectively with two single-point probes, and exports first signal respectively and secondary signal to signal receiving portion receives corresponding to noise signal.When selecting with the first single-point probe contact noise signal source, the first single-point probe is exported first signal to the signal receiving portion by the signal efferent after receiving noise signal.When selecting with the second single-point probe contact noise signal source, the second single-point probe receives noise signal, and after noise signal filtered via the noise signal straining element, signal efferent output secondary signal was to the signal receiving portion.
According to purpose of the present invention, a kind of electromagnetic interference (EMI) sniffer is also proposed, comprising: the first single-point probe, the second single-point probe, noise signal transmitting element, signal efferent and signal receiving portion.The first single-point probe and the second single-point probe, in order to selective exposure noise signal source to receive noise signal.The noise signal transmitting element is connected with the second single-point probe, and in order to being passed to an earth terminal by the part noise signal that the second single-point probe is received.The signal efferent is connected respectively with the first single-point probe and the second single-point probe, and exports first signal respectively and secondary signal to signal receiving portion receives corresponding to noise signal.When selecting with the first single-point probe contact noise signal source, the first single-point probe is exported first signal to the signal receiving portion by the signal efferent after receiving noise signal.When selecting with the second single-point probe contact noise signal source, the second single-point probe receives noise signal, and then, the noise signal of part is passed to earth terminal via the noise signal transmitting element, and produces secondary signal.At last, signal efferent output secondary signal is to the signal receiving portion.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Figure 1A and 1B are the synoptic diagram according to the electromagnetic interference (EMI) sniffer of first embodiment of the invention;
Fig. 2 A and 2B are the synoptic diagram of the electromagnetic interference (EMI) sniffer of second embodiment of the invention;
Fig. 3 is the synoptic diagram according to the electromagnetic interference (EMI) sniffer of third embodiment of the invention;
Fig. 4 is the synoptic diagram according to the electromagnetic interference (EMI) sniffer of fourth embodiment of the invention; And
Fig. 5 is the synoptic diagram of traditional electromagnetic interference (EMI) detecting structure.
Description of reference numerals
10,20,30,40: the electromagnetic interference (EMI) sniffer
11: circuit board
12,22a, 22b, 32,42a, 42b: probe
13,23,33,43: cable
14,24,34,44: the signal efferent
15,55: antenna
16,26,36,46,56: frequency spectrograph
24A: housing
27a, 27b: clicking section
28,38: the noise signal straining element
39: selector switch
39A: upper shell
39B: lower house
391: groove
392: metal coupling
393: lead
48: electric capacity
50: the electromagnetic interference (EMI) detecting structure
54: circular probe
58: electronic product to be measured
NS1: noise signal
S1A, S2A, S2B, S3A, S4A, S4B: signal
WS1A: wireless signal
Embodiment
The present invention discloses a kind of electromagnetic interference (EMI) sniffer, and it comprises a probe, a signal efferent and a signal receiving portion at least.Probe contacts the noise signal source of an electronic installation to receive noise signal in the mode of single-point contact.When probe contact noise signal source, noise signal is received by probe, outputs signal to the signal receiving portion by the signal efferent again.Practical application example as for electromagnetic interference (EMI) sniffer of the present invention will be as follows with first embodiment, second embodiment, the 3rd embodiment and the 4th embodiment description of drawings respectively.
First embodiment
Please refer to Figure 1A and 1B, it is the synoptic diagram according to the electromagnetic interference (EMI) sniffer of first embodiment of the invention.Electromagnetic interference (EMI) sniffer 10 mainly comprises probe 12, signal efferent 14 and signal receiving portion 16.Noise signal source 11 can be arbitrary electronic product, for example is circuit board; And the signal receiving portion for example is noise signal display or frequency spectrograph 16.Probe 12 in order to single-point contact circuit plate 11 to receive noise signal NS1.Signal efferent 14 can utilize the mode of rotating and separating, and is connected with probe 12, and exports a signal S1A corresponding to noise signal NS1, again via cable 13, is passed to frequency spectrograph 16.Frequency spectrograph 16 is used for received signal S1A and transform into the cognizable signal of user, shown in Figure 1A.
In addition, signal efferent 14 can utilize and being electrically connected of an extension type antenna 15, to transfer wireless signal WS1A to from the signal S1A of signal efferent 14 outputs, and wireless signal WS1A can be received by the antenna that is connected with frequency spectrograph 16, utilize frequency spectrograph 16 to transform into the cognizable signal of user again, shown in Figure 1B.Antenna 15 is scalable to adapt to the wireless signal of different frequency.
Second embodiment
Please be simultaneously with reference to Fig. 2 A and 2B, it shows the synoptic diagram of the electromagnetic interference (EMI) sniffer of second embodiment of the invention.Electromagnetic interference (EMI) sniffer 20 mainly comprises probe 22a, probe 22b, noise signal straining element 28, signal efferent 24 and signal receiving portion.Noise signal source 11 can be arbitrary appliance and electronic, for example is circuit board; And the signal receiving portion for example is noise signal display or frequency spectrograph 26.Probe 22a and probe 22b in order to selective exposure noise signal source 11 to receive noise signal NS1.Noise signal straining element 28 is connected in series with probe 22b, in order to filter the noise signal NS1 that receives from probe 22b.Noise signal straining element 28 for example is an inductance, resistance or restrictor (bead).Signal efferent 24 can utilize the mode of rotating and separating, and is connected with probe 22b with probe 22a, and respectively with this output signal S2A and signal S2B, is passed to frequency spectrograph 26 via cable 23 again.
In addition, the user can also move down by making clicking section 27b, and probe 22b is exposed to outside the housing 24A, so that probe 22b is able to contact circuit plate 11 to receive noise signal NS1.At this moment, after noise signal NS1 filtered via noise signal straining element 28, signal efferent 24 output signal S2B were passed to frequency spectrograph 26 via cable 23, again shown in Fig. 2 B.
In addition, similar to the signal transmission form shown in Figure 1B among first embodiment, signal efferent 24 can utilize the (not shown) that is electrically connected with an extension type antenna, will be converted to corresponding wireless signal from the signal S2A or the S2B of signal efferent 24 outputs.The antenna that this wireless signal can be connected with frequency spectrograph 26 receives, and utilizes frequency spectrograph 26 to transform into the cognizable signal of user again.Antenna is scalable to adapt to the wireless signal of different frequency.
The 3rd embodiment
Please refer to Fig. 3, it shows the synoptic diagram according to the electromagnetic interference (EMI) sniffer of third embodiment of the invention.Electromagnetic interference (EMI) sniffer 30 mainly comprises probe 32, selector switch 39, a plurality of noise signal straining element 38, signal efferent 34 and signal receiving portion.Noise signal source 11 can be arbitrary electronic product, for example is circuit board; And the signal receiving portion for example is noise signal display or frequency spectrograph 36.Probe 32 in order to contact circuit plate 11 to receive noise signal NS1.
A plurality of different noise signal straining elements 38 optionally are connected in series with probe 32, in order to filter the noise signal NS1 that is received from probe 32.Noise signal straining element 38 for example is inductance, resistance or restrictor (bead), and each noise signal straining element 38 has a predetermined impedance value, for example, resistance value can be 0 ohm (Ω), 100 ohm (Ω), 1000 ohm (Ω) etc., can do increase and decrease according to user's demand.Selector switch 39 is a rotatable device, and selector switch 39 for example is made up of a upper shell 39A and a lower house 39B.Upper shell 39A holds those noise signal straining elements 38, and lower house 39B holds probe 32.
The bottom of upper shell 39A has a plurality of grooves 391, and the individual conductors 393 that is connected with each noise signal straining element 38 is connected in the corresponding groove 391.The top of probe 32 is connected with a metal coupling 392, and the shape of metal coupling 392 is corresponding with the shape of groove 391.When the user rotated selector switch 39, metal coupling 392 can be thereupon and different groove 391 couplings, and probe 32 is electrically connected with corresponding noise signal straining element 38 by metal coupling 392 and lead 393.By user's rotary selector 39, can reach select those noise signal straining elements 38 together with probe 32 purpose of connecting.
Signal efferent 34 is electrically connected respectively with each noise signal straining element 38, also the filter effect of basis other noise signal straining element 38 is passed to frequency spectrograph 36 via cable 33 again to export corresponding signal S3A respectively.Frequency spectrograph 36 is used for received signal S3A and transform into the cognizable signal of user.
In addition, present embodiment also can use the signal transmission form shown in Figure 1B among similar first embodiment, and signal efferent 34 can be electrically connected (not shown) with an extension type antenna.The extension type antenna can transfer the signal S3A from 34 outputs of signal efferent to corresponding wireless signal output, and this wireless signal can utilize frequency spectrograph 36 to transform into the cognizable signal of user by the antenna reception that is connected with frequency spectrograph 36 again.
The 4th embodiment
Please refer to Fig. 4, it shows the synoptic diagram according to the electromagnetic interference (EMI) sniffer of fourth embodiment of the invention.Electromagnetic interference (EMI) sniffer 40 comprises: probe 42a, probe 42b, noise signal transmitting element 48, signal efferent 44 and signal receiving portion.Noise signal source 11 can be arbitrary electronic product, for example is circuit board; And the signal receiving portion for example is noise signal display or frequency spectrograph 46.Probe 42a and probe 42b, in order to selective exposure circuit board 11 to receive noise signal NS1.Noise signal transmitting element 48 for example is an electric capacity, and 42b is connected with probe.When using the electromagnetic interference (EMI) sniffer 40 of the 4th embodiment, electric capacity 48 will be in order to being passed to an earth terminal by the noise signal NS1 of probe 42a institute receiving unit.
Signal efferent 44 can use the mode of rotating and separating to be connected with probe 42a and probe 42b, and difference output signal S4A and signal S4B, is passed to frequency spectrograph 46 via cable 43 again.
In the time will using the electromagnetic interference (EMI) sniffer 40 of the 4th embodiment, probe 42a contact circuit plate 11 is with reception noise signal NS1, and probe 42b contact earth terminal for example is the earth terminal on the circuit board 11.So, be passed to earth terminal by the noise signal NS1 of the received part of probe 42a via electric capacity 48, remaining noise signal then exports signal efferent 44 to.Signal efferent 44 output signal S4B again via cable 43, are passed to frequency spectrograph 46.
In addition, similar to the signal transmission form shown in Figure 1B among first embodiment, signal efferent 44 also can utilize the (not shown) that is electrically connected with an extension type antenna, the signal S4B of signal efferent 44 outputs can be converted to corresponding wireless signal output, and receive by the antenna that is connected with frequency spectrograph 46.
The invention spirit of detection electromagnetic interference (EMI) device of the present invention and application example disclose respectively with above-mentioned first embodiment, second embodiment, the 3rd embodiment and the 4th embodiment, yet those skilled in the art also are appreciated that technology of the present invention and are not limited thereto, and the disclosed characteristics of each embodiment also can merge voluntarily according to user's demand and are applied in the same sniffer.For example, second embodiment and the 4th embodiment are merged use, to have the detection effect as the second and the 4th embodiment simultaneously, it is described in detail as follows.
Electromagnetic interference (EMI) sniffer 20 also comprises one the 3rd single-point probe, a noise signal transmitting element and a selector switch except comprising probe 22a, probe 22b, noise signal straining element 28, signal efferent 24 and frequency spectrograph 26.The 3rd single-point probe in order to selective exposure noise signal source to receive noise signal.The noise signal transmitting element is connected with the 3rd single-point probe, and the noise signal transmitting element will be in order to being passed to an earth terminal by the part noise signal that the 3rd single-point probe is received.When selecting with the 3rd single-point probe contact circuit plate 11, the 3rd single-point probe receives noise signal NS1 and noise signal partly is passed to earth terminal via the noise signal transmitting element, makes signal efferent 24 outputs one the 3rd signal to frequency spectrograph 26.The 3rd signal corresponds to the noise signal of the remainder that the 3rd single-point probe exported.Selector switch is a rotatable device, and in order to hold the noise signal transmitting element, by user's rotary selector, and reaches this corresponding probe of selecting with circuit board 11 contacts.
Also or, electromagnetic interference (EMI) sniffer 20 can also comprise a plurality of noise signal transmitting elements in addition except comprising probe 22a, probe 22b, noise signal straining element 28, signal efferent 24 and frequency spectrograph 26, it is described in detail as follows.
Electromagnetic interference (EMI) sniffer 20 also comprises the 4th single-point probe, a selector switch and a plurality of noise signal transmitting element.Receiving noise signal NS1, and a plurality of noise signal transmitting element is in order to optionally being connected in series with the 4th single-point probe in order to selective exposure circuit board 11 for the 4th single-point probe, and each noise signal transmitting element has a predetermined capacitance value.Selector switch is operated this selector switch in order to hold those noise signal transmitting elements and those noise signal straining elements by the user, with a corresponding probe of decision contact circuit plate 11.
Detection electromagnetic interference (EMI) device of the present invention by probe with the mode contact noise signal source of single-point contact to receive noise signal, can be rapidly and generation place that correctly single-point is surveyed noise signal, and apace the noise signal at this place is produced reason and analyzed and eliminate.In addition, by the use of noise signal straining element and noise signal transmitting element, whether the noise signal that can directly use detection electromagnetic interference (EMI) device of the present invention to learn to be produced can be eliminated by noise signal straining element and noise signal transmitting element.Also or, board design person can be directly with pairing noise signal straining element and the addition of noise signal transmitting element on circuit board, to eliminate the noise signal that is produced.Compare with tradition, use detection electromagnetic interference (EMI) device of the present invention, the noise signal that the deviser can promptly eliminate circuit board disturbs, to obtain high-quality circuit board.So, can increase the finished product rate, reduce production costs.
In sum; though the present invention discloses as above with preferred embodiment; yet it is not in order to limit the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; when can making various changes and retouching, so protection scope of the present invention should be with being as the criterion that appending claims was limited.
Claims (27)
1. electromagnetic interference (EMI) sniffer, in order to survey a noise signal in a noise signal source, this sniffer comprises:
One probe contacts this noise signal source to receive this noise signal in order to single-point;
One signal efferent is connected with this probe, and output is corresponding to a signal of this noise signal; And
One signal receiving portion is in order to receive this signal;
Wherein, when this probe contacted this noise signal source, this noise signal was received by this probe, by this signal efferent, exported this signal to this signal receiving portion again.
2. sniffer as claimed in claim 1, wherein this sniffer also comprises:
One antenna is electrically connected with this signal efferent, and this antenna be a wireless signal in order to this conversion of signals that will export from this signal efferent, and export this signal receiving portion to.
3. sniffer as claimed in claim 2, wherein this antenna is scalable to adapt to the wireless signal of different frequency.
4. sniffer as claimed in claim 1, wherein this signal receiving portion is a noise signal display.
5. electromagnetic interference (EMI) sniffer, in order to survey a noise signal in a noise signal source, this sniffer comprises:
One first single-point probe and one second single-point probe, in order to this noise signal source of selective exposure to receive this noise signal;
One noise signal straining element is connected in series with this second single-point probe, and this noise signal straining element is in order to filter this noise signal that receives from this second single-point probe;
One signal efferent is connected respectively with this first single-point probe and this second single-point probe, and exports one first signal and a secondary signal respectively corresponding to this noise signal; And
One signal receiving portion is in order to receive this first signal and this secondary signal;
Wherein, when selection contacted this noise signal source with this first single-point probe, this first single-point probe received this noise signal, corresponds to this first signal and exports this first signal to this signal receiving portion by this signal efferent;
Wherein, when selection contacts this noise signal source with this second single-point probe, this second single-point probe receives this noise signal, and this noise signal filters the back via this noise signal straining element and produces this secondary signal, and this signal efferent is exported this secondary signal to this signal receiving portion.
6. sniffer as claimed in claim 5, wherein this noise signal straining element is an inductance.
7. sniffer as claimed in claim 5, wherein this noise signal straining element is a resistance.
8. sniffer as claimed in claim 5, wherein this noise signal straining element is a restrictor.
9. sniffer as claimed in claim 5, wherein this sniffer also comprises:
One antenna is electrically connected with this signal efferent, and this antenna be a wireless signal in order to this conversion of signals that will export from this signal efferent, and export this signal receiving portion to.
10. sniffer as claimed in claim 9, wherein this antenna is scalable to adapt to the wireless signal of different frequency.
11. sniffer as claimed in claim 5, wherein this sniffer also comprises a plurality of noise signal straining elements, and in order to optionally to be connected in series with this second single-point probe, each noise signal straining element has a predetermined impedance value.
12. sniffer as claimed in claim 11, wherein this sniffer also comprises a selector switch, in order to hold those noise signal straining elements, operates this selector switch by the user, with a single element that determines to be connected with this second probe.
13. sniffer as claimed in claim 12, wherein this selector switch is a rotatable device, rotates this selector switch by this user, and reaches this single element that selection is connected with this second probe.
14. sniffer as claimed in claim 5, wherein this sniffer also comprises:
One the 3rd single-point probe, in order to this noise signal source of selective exposure to receive this noise signal; And
One noise signal transmitting element is connected with the 3rd single-point probe, and this noise signal transmitting element will be in order to being passed to an earth terminal by this noise signal of part that the 3rd single-point probe is received;
Wherein, when selection contacts this noise signal source with the 3rd single-point probe, the 3rd single-point probe receives this noise signal and this noise signal partly is passed to this earth terminal via this noise signal transmitting element, makes this signal efferent export one the 3rd signal to this signal receiving part.
15. sniffer as claimed in claim 14, wherein the 3rd signal corresponds to the noise signal of this remainder that the 3rd single-point probe exported.
16. sniffer as claimed in claim 14, wherein this noise signal transmitting element is an electric capacity.
17. sniffer as claimed in claim 14, wherein this sniffer also comprises a selector switch, in order to hold this noise signal transmitting element and this noise signal straining element, operate this selector switch by the user, with a corresponding probe in this noise signal source of decision contact.
18. sniffer as claimed in claim 17, wherein this selector switch is a rotatable device, rotates this selector switch by this user, and reaches this corresponding probe of selecting with this noise signal source contact.
19. sniffer as claimed in claim 14, wherein this sniffer also comprises a plurality of noise signal transmitting elements, and in order to optionally to be connected in series with the 3rd single-point probe, each noise signal transmitting element has a predetermined capacitance value.
20. sniffer as claimed in claim 19, wherein this sniffer also comprises a selector switch, in order to hold this noise signal transmitting element and those noise signal straining elements, operate this selector switch by the user, with a corresponding probe in this noise signal source of decision contact.
21. sniffer as claimed in claim 20, wherein this selector switch one rotatable device rotates this selector switch by this user, and reaches this corresponding probe of selecting this noise signal source of contact.
22. sniffer as claimed in claim 5, wherein this signal receiving portion is a noise signal display.
23. an electromagnetic interference (EMI) sniffer, in order to survey a noise signal in a noise signal source, this sniffer comprises:
One first single-point probe and one second single-point probe, in order to this noise signal source of selective exposure to receive this noise signal;
One noise signal transmitting element is connected with this second single-point probe, and this noise signal transmitting element will be in order to being passed to an earth terminal by this noise signal of part that this second single-point probe is received;
One signal efferent is connected respectively with this first single-point probe and this second single-point probe, and exports one first signal and a secondary signal respectively corresponding to this noise signal; And
One signal receiving portion is in order to receive this first signal and this secondary signal;
Wherein, when selection contacted this noise signal source with this first single-point probe, this first single-point probe received this noise signal, corresponds to this first signal and exports this first signal to this signal receiving portion by this signal efferent;
Wherein, when selection contacts this noise signal source with this second single-point probe, this second single-point probe receives this noise signal, and the part this noise signal be passed to this earth terminal via this noise signal transmitting element, make this signal efferent export this secondary signal to this signal receiving portion.
24. sniffer as claimed in claim 23, this noise signal transmitting element is an electric capacity.
25. sniffer as claimed in claim 23, wherein this sniffer also comprises:
One antenna is electrically connected with this signal efferent, this antenna in order to will from the output of this signal efferent this first or secondary signal be converted to a wireless signal, and export this signal receiving portion to.
26. sniffer as claimed in claim 24, wherein this antenna is scalable to adapt to the wireless signal of different frequency.
27. sniffer as claimed in claim 23, wherein this signal receiving portion is a noise signal display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310113157 CN1635385A (en) | 2003-12-25 | 2003-12-25 | Electromagnetic interference detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310113157 CN1635385A (en) | 2003-12-25 | 2003-12-25 | Electromagnetic interference detecting device |
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|---|---|
| CN1635385A true CN1635385A (en) | 2005-07-06 |
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| CN 200310113157 Pending CN1635385A (en) | 2003-12-25 | 2003-12-25 | Electromagnetic interference detecting device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101526573B (en) * | 2008-03-07 | 2012-05-16 | 鸿富锦精密工业（深圳）有限公司 | Electromagnetic interference detecting device |
| CN103575983A (en) * | 2012-07-20 | 2014-02-12 | 纬创资通股份有限公司 | Measuring system |
| TWI467201B (en) * | 2011-02-24 | 2015-01-01 | Hon Hai Prec Ind Co Ltd | Electromagnetic generating device used in electromagnetic interference test |
| CN106932660A (en) * | 2017-03-30 | 2017-07-07 | 上海与德科技有限公司 | A kind of noise detection device and method |
| CN111610365A (en) * | 2020-05-09 | 2020-09-01 | 深圳市火乐科技发展有限公司 | Spectrum analysis device and spectrum analysis method |
-
2003
- 2003-12-25 CN CN 200310113157 patent/CN1635385A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101526573B (en) * | 2008-03-07 | 2012-05-16 | 鸿富锦精密工业（深圳）有限公司 | Electromagnetic interference detecting device |
| TWI467201B (en) * | 2011-02-24 | 2015-01-01 | Hon Hai Prec Ind Co Ltd | Electromagnetic generating device used in electromagnetic interference test |
| CN103575983A (en) * | 2012-07-20 | 2014-02-12 | 纬创资通股份有限公司 | Measuring system |
| US9250279B2 (en) | 2012-07-20 | 2016-02-02 | Wistron Corporation | Measuring system |
| CN103575983B (en) * | 2012-07-20 | 2016-08-03 | 纬创资通股份有限公司 | Measurement system and measurement method |
| CN106932660A (en) * | 2017-03-30 | 2017-07-07 | 上海与德科技有限公司 | A kind of noise detection device and method |
| CN111610365A (en) * | 2020-05-09 | 2020-09-01 | 深圳市火乐科技发展有限公司 | Spectrum analysis device and spectrum analysis method |
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