CN202183773U - Vehicle-mounted system - Google Patents
Vehicle-mounted system Download PDFInfo
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- CN202183773U CN202183773U CN2011202471379U CN201120247137U CN202183773U CN 202183773 U CN202183773 U CN 202183773U CN 2011202471379 U CN2011202471379 U CN 2011202471379U CN 201120247137 U CN201120247137 U CN 201120247137U CN 202183773 U CN202183773 U CN 202183773U
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Abstract
A vehicle-mounted system comprises a communication module, a power supply circuit suitable for providing a power supply, an audio circuit suitable for processing various audio signals, an audio power amplifier suitable for outputting auto signals processed by the audio circuit to a loudspeaker and a power supply management unit suitable for supplying electricity to the communication module and the audio circuit. The power supply management unit and the audio power simplifier are respectively connected with the power supply circuit, and the power supply circuit, the power supply management unit, the communication module are connected with a digital ground, and the audio circuit is connected with an analog ground. The vehicle-mounted system further comprises an energy storage filter circuit which is suitable for performing filtering and energy storage on the power output by the power supply management unit and a first magnetic bead suitable for connecting the digital ground and the analog ground, wherein the energy storage filter circuit is connected with the power supply management unit, the communication module and the digital ground, and a radiating fin of the audio power amplifier is connected with the digital ground. The vehicle-mounted system can eliminate influence of time division distortion (DTT) noise and enhance use experience of users.
Description
Technical field
The utility model relates to vehicle electric field, particularly a kind of onboard system.
Background technology
High speed development along with automotive electronic industry; Global system for mobile communications (GSM; Global System for Mobile Communications)/general packet radio service technology (GPRS; General Packet Radio Service)/enhanced data rates for gsm evolution technology mobile communication technologies such as (EDGE, Enhanced Data Rate for GSM Evolution) is used widely on onboard system.The user can utilize the mobile communication module on the onboard system to call or connect mobile broadband network and obtain the service of Internet network.
Yet; Because the 2G GSM adopts time division multiple access (TDMA; Time Division Multiple Access) technology; Time-division distortion noise (TDD Noise, Time Division Distortion Noise) common on the mobile communication terminal device is perplexing the user who uses above-mentioned onboard system always.
TDD Noise causes former because; Power amplifier (the PA of communication terminal radiofrequency emitting module; Power Amplify) every 217Hz has the generation that transmits, and in this signal, comprises the 2.0G GSM signal of 900MHz/1800MHz or 1900MHz and the envelope (envelope) of PA.TDD Noise can influence the work of the functional module on the onboard system, and the most directly impression is, the buzz that we heard, i.e. the envelope noise of PA generation when emission.Because the auditory frequency range of people's ear is 20Hz～20KHz, and 217Hz drops in people's ear range of audibility just.So, when various audio signals from audio codec (Audio Codec) when outputing to auto loud hailer, above-mentioned interference will be scurried into, and just can hear suchlike drone noise, has a strong impact on the experience of user to onboard system.
Application number is that 200910036945.8 one Chinese patent application discloses a kind of intelligent vehicle-mounted system, but relates to for not addressing the above problem.
The utility model content
The technical problem that the utility model will solve provides a kind of onboard system, and TDD Noise has solved the influence of above-mentioned interference tones to the user experience onboard system effectively to the problem of audio signal influence in the solution prior art onboard system.
For addressing the above problem; The utility model provides a kind of onboard system; Comprise: digitally, simulation ground, communication module and be suitable for PMU (PMU to said communication module power supply; Power Management Unit), said PMU, communication module connect digitally said, also comprise:
Be suitable for the energy storage filter circuit that the power supply to the output of said PMU carries out filtering and energy storage, said energy storage filter circuit connects said PMU, communication module and digitally;
Be suitable for connecting said digitally with first magnetic bead on simulation ground.
Optional; Said onboard system also comprises: be suitable for providing power supply power circuit, be suitable for handling the audio-frequency power amplifier of the voicefrequency circuit of various audio signals, audio signal output to the loud speaker after being suitable for said voicefrequency circuit handled; Said PMU, audio-frequency power amplifier link to each other with said power circuit respectively; Said voicefrequency circuit is with said PMU, link to each other to said simulation, and the fin of said audio-frequency power amplifier and power circuit digitally link to each other with said respectively.
Optional, said energy storage filter circuit comprises second magnetic bead and first electric capacity, and said second magnetic bead is connected between said PMU and the communication module, said first electric capacity be connected in said second magnetic bead an end and said digitally between.
Optional, said energy storage filter circuit also comprises at least one and the parallelly connected electric capacity of said first electric capacity.
Optional, said energy storage filter circuit also comprises second electric capacity, said second electric capacity be connected in said second magnetic bead the other end and said digitally between.
Optional, said energy storage filter circuit also comprises at least one and the parallelly connected electric capacity of said second electric capacity.
Compared with prior art, the technical scheme of the utility model has the following advantages:
Through with the simulation of onboard system ground with digitally isolate, with first magnetic bead connect said digitally with simulation ground, i.e. digitally some being connected through magnetic bead of onboard system, effectively avoided digitally to simulating the interference on ground with simulation ground; Through between communication module and PMU, increasing the energy storage filter circuit, strengthened power supply to said communication module, reduced the interference strength of TDD Noise.
Further, through the fin of audio-frequency power amplifier being connected digitally the influence when suppressing TDD Noise audio-frequency power amplifier is amplified audio signal, thereby solved the influence of above-mentioned interference tones TDD Noise effectively to the user experience onboard system.
Description of drawings
Fig. 1 is the structural representation of onboard system in the prior art;
Fig. 2 is the waveform sketch map of GSM burst sequence;
Fig. 3 is the structural representation of the onboard system that provides of the utility model execution mode;
Fig. 4 is a kind of embodiment sketch map of energy storage filter circuit;
Fig. 5 is the another kind of embodiment sketch map of energy storage filter circuit;
Fig. 6 is the waveform sketch map of TDD Noise on the voice-frequency channel of onboard system in the prior art;
Fig. 7 is the waveform sketch map of TDD Noise on the voice-frequency channel of the onboard system that provides of the utility model execution mode.
Embodiment
The interference tones TDD Noise that the communication module of onboard system produces in the prior art disturbs by digitally simulation ground being produced, and has directly influenced the voicefrequency circuit of onboard system, thereby can have a strong impact on the experience of user to onboard system.Fig. 1 is the structural representation of onboard system in the prior art.As shown in Figure 1; Onboard system generally comprises in the prior art: communication module 103, be suitable for providing power supply power circuit 100, be suitable for handling the voicefrequency circuit 104 of various audio signals, audio signal output to the loud speaker 105 after being suitable for said voicefrequency circuit 104 handled audio-frequency power amplifier 102, be suitable for PMU 101 to said communication module 103 and voicefrequency circuit 104 power supplies; Said PMU 101, audio-frequency power amplifier 102 link to each other with said power circuit 100 respectively; Said power circuit 100, PMU 101, communication module 103 connect digitally 10a, and said voicefrequency circuit 104 connects simulation ground 10b.
Automobile power source is generally provided by the storage battery of automobile, and through said power circuit 100 outputs, its output voltage is generally 12V.After exporting the automobile power source of 12V to PMU 101 through power circuit 100, give communication module 103 and voicefrequency circuit 104 power supplies by PMU 101.In addition, also export the automobile power source of 12V to audio-frequency power amplifier 102, various audio signal outputs to the loud speaker 105 after by audio-frequency power amplifier 102 voicefrequency circuit 104 being handled through power circuit 100.When onboard system was surfed the Net or made a phone call through GSM/GPRS/EDGE, the TDDNoise that communication module 103 produces can be coupled on the ground level (comprising digitally 10a and simulation ground 10b).As shown in Figure 1, onboard system adopts in the prior art is simulation ground 10b and 10a multiple spot ways of connecting digitally, and in simple terms, digitally 10a is the common reference end of digital circuit part, simulation 10b be the common reference end of artificial circuit part.Digital signal is a square wave generally speaking, has a large amount of harmonic waves, and the digitally 10a in the ifs circuit plate directly links to each other with simulation ground 10b large tracts of land, and the harmonic wave in the digital signal is easy to interfere with analog signal so.So, have the digitally 10a meeting interference simulation ground 10b of TDD Noise in the onboard system, directly influence the voicefrequency circuit 104 of onboard system, make the signal to noise ratio of audio signal seriously descend, thereby make generation drone noise on loud speaker 105.
Gsm system transmits most importantly burst sequence (Burst) of the basic conception that relates on wireless path, be called for short burst sequences, and it is a string transmission unit that contains hundred modulation bit.The burst sequence has the duration and the wireless frequency spectrum that occupies qualification of a qualification.In the gsm communication standard, 1 tdma frame has 8 time slots (TS, Time Slot), and the length of each time slot is 577 μ s, and then each tdma frame length is 577 μ s * 8 ≈ 4.6ms, and frequency is about 217Hz.GSM is a transmission duplex, as long as just be in communications status, frame emission is to send continuously.Fig. 2 is the waveform sketch map of GSM burst sequence.As shown in Figure 2; In certain time slot of each tdma frame, communication module all can have a Burst to produce when each emission, and this Burst needs the big electric current of about 1.6A; And do not producing electric current required under the situation of Burst less than 1A; Therefore, can in time supply this required when producing Burst big electric current, most important for the interference strength that reduces TDD Noise.
Based on above-mentioned analysis, the present technique scheme through with the simulation of onboard system ground with digitally isolate, adopt magnetic bead a bit connect said digitally with simulation ground, effectively avoided digitally interference to simulation ground; Through between communication module and PMU, increasing the energy storage filter circuit, strengthened power supply to said communication module, reduced the interference strength of TDD Noise; Through the fin of audio-frequency power amplifier being connected digitally the influence when suppressing TDD Noise audio-frequency power amplifier is amplified audio signal.
For above-mentioned purpose, the feature and advantage that make the utility model can be more obviously understandable, the embodiment of the utility model is done detailed explanation below in conjunction with accompanying drawing.Set forth detail in the following description so that make much of the utility model.But the utility model can be different from alternate manner described here and implements with multiple, and those skilled in the art can do similar popularization under the situation of the utility model intension.Therefore the utility model does not receive the restriction of following disclosed embodiment.
Fig. 3 is the structural representation of the onboard system that provides of the utility model execution mode.As shown in Figure 3; The onboard system that the utility model execution mode provides comprises communication module 203, be suitable for providing the power circuit 200 of power supply, be suitable for handling the voicefrequency circuit 204 of various audio signals, the audio-frequency power amplifier 202 of audio signal output to the loud speaker 205 after being suitable for said voicefrequency circuit 204 handled, be suitable for the PMU 201 to said communication module 203 and voicefrequency circuit 204 power supplies; Said PMU 201, audio-frequency power amplifier 202 link to each other with said power circuit 200 respectively; Said power circuit 200, PMU 201, communication module 203 connect digitally 20a; Said voicefrequency circuit 204 connects simulation ground 20b; Said onboard system also comprises: be suitable for the energy storage filter circuit 206 that the power supply to 201 outputs of said PMU carries out filtering and energy storage, the said PMU of said energy storage filter circuit 206 connections 201, communication module 203 and 20a digitally; Be suitable for connecting said digitally 20a and first magnetic bead 30 of simulating ground 20b.
In the specific embodiment, automobile power source is provided by the storage battery of automobile, and through said power circuit 200 outputs, its output voltage is 12V, and the automobile power source of 12V exports PMU 201 and audio-frequency power amplifier 202 respectively to.Need to prove that PMU 201 also is other functional module (not shown)s power supplies of onboard system except giving communication module 203 and voicefrequency circuit 204 power supplies.Other functional modules of said onboard system can comprise that the audio frequency and video playing module is (not shown; Here specifically refer to the equipment of all kinds of audio-video signals that receive through voicefrequency circuit or video circuit output; CD player etc. for example; In voicefrequency circuit or video circuit then be not included in), broadcast receiver receiver module (not shown), navigation module (not shown), human-computer interaction module (not shown) or the like (wherein some module possibly need same operating voltage, therefore need carry out intelligent electric power management by PMU 201).Audio frequency and video playing module, navigation module, broadcast receiver receiver module, etc. multiple module all maybe be as the source of sound output audio signal, through voicefrequency circuit 204 realize said audio signal input, handle and export.For example, the CD player of onboard system will pass through coding in playing back music audio signal through audio codec (Audio Codec) decoding after, export loud speaker 205 to after by audio-frequency power amplifier 202 decoded audio signal being amplified.In addition, navigation module in order to realize Voice Navigation, also can be exported voice in navigation procedure with the form of audio signal.
In fact; The TDD Noise that communication module 203 produces can bring certain influence (for example disturbing the signal in the circuit of other functional modules) to the circuit of other functional modules of onboard system; Therefore; Through the simulation of onboard system ground 20b and 20a are digitally isolated, adopt 30 1 of first magnetic beads to connect said digitally 20a and simulation ground 20b, effectively avoided digitally 20a to the interference of simulation ground 20b; And; Through between communication module 203 and PMU 201, increasing energy storage filter circuit 206; Strengthened power supply, reduced the interference strength of TDD Noise, and then reduced the interference of other functional modules of 203 pairs of onboard systems of communication module said communication module 203.
Because TDD Noise is particularly serious to the influence of voicefrequency circuit 204; And be that the user directly can experience; Because the frequency of TDD Noise drops in the auditory frequency range of people's ear just; After voicefrequency circuit 204 was scurried in above-mentioned interference, the user just can hear drone the noise that produces therefrom, has a strong impact on the experience of user to onboard system.Therefore, in the utility model execution mode, be that voicefrequency circuit is an example with other functional modules, mainly the influence of voicefrequency circuit is described with TDD Noise.
For fear of the interference of 20a digitally to simulation ground 20b; Digitally 20a with onboard system in the utility model execution mode isolates (no longer taking the multiple spot ways of connecting) with simulation ground 20b; But see that from electrical point two ground levels of onboard system are the unified zero potential plane of reference of the just impossible formation of short circuit, therefore adopt said first magnetic bead 30 the simulation ground 20b of onboard system and digitally some connection between the 20a; Because magnetic bead in the ideal case; Resistance is 0 when direct current, and resistance is very big when high frequency, so the noise and the spike that can suppress preferably on the 20a digitally disturb.In the present embodiment, the direct current conducting resistance (DCR) of said first magnetic bead 30 is less than or equal to 0.1 Ω, and rated current is more than or equal to 1A, and the impedance under 100MHz is more than or equal to 120 Ω.In the present embodiment; Said first magnetic bead 30 specifically designs the simulation ground 20b of onboard system and the position that digitally connects between the 20a in input place of onboard system power supply; Promptly when circuit design; With onboard system digitally and the link position of simulation between the ground be arranged at power supply input place near onboard system as far as possible, the TDD Noise that can make generation is like this prevented the influence to out-put supply by importing digital ground 20a apace.
As previously mentioned; Because during communication module 203 each emissions; The capital has a Burst to produce, and this Burst needs the big electric current of 1.6A at least, in order to supply this big electric current in time; The interference strength of TDD Noise is diminished; As shown in Figure 3, on the power supply of communication module 203, increased in the utility model execution mode and be suitable for the energy storage filter circuit 206 that the power supply to 201 outputs of said PMU carries out filtering and energy storage, said energy storage filter circuit 206 connects said PMU 201, communication module 203 and 20a digitally respectively.Particularly; Energy storage filter circuit 206 can be realized the function of its filtering and energy storage through magnetic bead and electric capacity; Wherein, magnetic bead (be exclusively used in the high-frequency noise and the spike that suppress on holding wire, the power line and disturb, also have the ability that absorbs electrostatic pulse) has the effect of filtering; And electric capacity mainly plays energy storage except realizing filtering in the utility model execution mode.With two embodiment the structure of said energy storage filter circuit is elaborated below.
Fig. 4 is a kind of embodiment sketch map of energy storage filter circuit.As shown in Figure 4; Energy storage filter circuit 206a comprises second magnetic bead 40 and first electric capacity 301; Said second magnetic bead 40 is connected between said PMU 201 and the communication module 203; First end that is said second magnetic bead 40 links to each other with the power output end of said PMU 201; Second end of said second magnetic bead 40 links to each other with said communication module 203, and first end of first electric capacity 301 links to each other with first end or second end (situation about linking to each other with second end has been shown among Fig. 4) of said second magnetic bead 40, and second end of said first electric capacity 301 connects digitally.During practical implementation, generally can first end of first electric capacity 301 be linked to each other with second end of said second magnetic bead 40, promptly earlier carry out filtering, carry out energy storage by first electric capacity 301 again, can obtain effect preferably like this by second magnetic bead 40.
In the present embodiment, energy storage filter circuit 206a comprised said second magnetic bead 40 and be connected in an end of said second magnetic bead 40 and digitally between an electric capacity, i.e. first electric capacity 301.During practical implementation, the appearance value of said first electric capacity 301 is more than or equal to 470 μ F, and is withstand voltage more than or equal to 6V.Adopt the bigger electric capacity of appearance value, can store the electric energy of capacity, sufficient power when guaranteeing communication module 203 generation Burst.In other embodiments; The energy storage filter circuit can also comprise at least one and the parallelly connected electric capacity of said first electric capacity 301; Be a plurality of electric capacity be connected in parallel on an end of second magnetic bead and digitally between; The appearance value sum of all electric capacity is more than or equal to 470 μ F in the energy storage filter circuit, and each electric capacity is withstand voltage all more than or equal to 6V.
Based on the embodiment of energy storage filter circuit shown in Figure 4, the another kind of embodiment of energy storage filter circuit is provided also.Fig. 5 is the another kind of embodiment sketch map of energy storage filter circuit.As shown in Figure 5; Energy storage filter circuit 206b comprises two electric capacity; First end that is respectively second electric capacity 302 and first electric capacity, 301, the second magnetic beads 40 shown in Figure 4 links to each other with the power output end of said PMU 201, and second end of said second magnetic bead 40 links to each other with communication module 203; First end of said first electric capacity 301 links to each other with second end of said second magnetic bead 40, and first end of said second electric capacity 302 links to each other with first end of said second magnetic bead 40, and second end of first electric capacity 301, second electric capacity 302 connects digitally respectively.
Shown in Fig. 5 is the situation that first end of first electric capacity 301 links to each other with second end of second magnetic bead 40; First end of first electric capacity 301 also can link to each other with first end of second magnetic bead 40; At this moment; First end of second electric capacity 302 links to each other with second end of said second magnetic bead, and second end of first electric capacity 301, second electric capacity 302 connects digitally respectively.
In the present embodiment, energy storage filter circuit 206b has comprised said second magnetic bead 40 and has been connected in an end of said second magnetic bead 40 (shown in Fig. 5 is first end) and said second electric capacity 302 and the other end (shown in Fig. 5 is second end) and said first electric capacity 301 between digitally that is connected in second magnetic bead 40 between digitally.In other embodiments; The energy storage filter circuit can also comprise electric capacity that at least one is parallelly connected with said first electric capacity 301 and/or at least one and the parallelly connected electric capacity of said second electric capacity 302; The appearance value sum of all electric capacity is more than or equal to 470 μ F in the energy storage filter circuit, and each electric capacity is withstand voltage all more than or equal to 6V.
Among two embodiment of above-mentioned energy storage filter circuit, said first electric capacity 301, second electric capacity 302 can be electrochemical capacitor, and for example alminium electrolytic condenser, tantalum electrochemical capacitor etc. also can be ceramic condenser; The direct current conducting resistance of said second magnetic bead 40 is less than or equal to 0.1 Ω, and rated current is more than or equal to 2A, needed big electric current in the time of so just in time supplying Burst and produce, thus the interference strength of TDD Noise is diminished.
When the energy storage filter circuit had 1 above electric capacity, the appearance value of each electric capacity can be identical, also can be different.Discover through the inventor; In the energy storage filter circuit, has 1 above electric capacity; And not only comprised the bigger electric capacity of the appearance value that mainly plays the energy storage effect (for example comprise electric capacity that two appearance values are 330 μ F perhaps appearance value more than or equal to the electric capacity of 470 μ F) but also comprised the less electric capacity of the appearance value that mainly strobes when (for example comprising that at least one appearance value is the electric capacity that is less than or equal to 1 μ F), and can reach better effect for the power supply of communication module 203.
Continue to consult Fig. 3; When audio signal when audio-frequency power amplifier 202 amplifies; In order to suppress the influence of TDD Noise to it, also the fin 202a of audio-frequency power amplifier 202 is met digitally 20a in the utility model execution mode, can play the effect of shielding simultaneously.
PMU (PMU) is the power management scheme that a kind of height is integrated, be directed against portable use; Being about to some types of discrete power management devices of tradition is incorporated within the single encapsulation; Can realize higher power supply conversion efficiency and more low-power consumption like this, and package count still less is to adapt to the plate level space that dwindles.In the present embodiment, PMU 201 can adopt intelligent electric power management scheme commonly used in the prior art, repeats no more at this.Need to prove that at other embodiment, said PMU 201 also can be integrated among the said power circuit 200.
In addition; Said loud speaker 205 is generally the loud speaker (this moment, this loud speaker was not included within the described onboard system of this execution mode) that disposes on the automobile; Certainly; The loud speaker (this moment, this loud speaker belonged to the part of onboard system described in this execution mode) that loud speaker 205 disposes on also can other functional modules for onboard system, the voice of the loud speaker output navigation that for example carries on the navigation module of onboard system.
Fig. 6 is the waveform sketch map of TDD Noise on the voice-frequency channel of onboard system in the prior art.As shown in Figure 6, do not having to find out under the situation of audio signal source that TDD Noise is very serious to the influence of voice-frequency channel, the interference signal amplitude surpasses 300mV.Fig. 7 is the waveform sketch map of TDD Noise on the voice-frequency channel of the onboard system that provides of the utility model execution mode.As shown in Figure 7, can find out that equally the interference on the voice-frequency channel of the onboard system that TDD Noise provides the utility model execution mode is less than 15mV not having under the situation of audio signal source.Need to prove that the waveform sketch map of TDD Noise is under identical test environment, to obtain on Fig. 6 and the voice-frequency channel shown in Figure 7, all is identical for PMU to the parameters such as supply power voltage of communication module output for example.Can find out that with Fig. 7 the onboard system that the utility model execution mode provides has been eliminated the influence of interference tones TDDNoise to onboard system, has solved the problem that above-mentioned interference tones influences the user experience onboard system through comparison diagram 6.
To sum up, the onboard system that the utility model execution mode provides has following beneficial effect at least:
Through with the simulation of onboard system ground with digitally isolate, with first magnetic bead connect said digitally with simulation ground, i.e. digitally some being connected through magnetic bead of onboard system, effectively avoided digitally to simulating the interference on ground with simulation ground; Through between communication module and PMU, increasing the energy storage filter circuit, strengthened power supply to said communication module, reduced the interference strength of TDD Noise; Through the fin of audio-frequency power amplifier being connected digitally the influence when suppressing TDD Noise audio-frequency power amplifier is amplified audio signal, thereby solved the influence of above-mentioned interference tones TDD Noise effectively to the user experience onboard system.
Though the utility model with preferred embodiment openly as above; But it is not to be used for limiting the utility model; Any those skilled in the art are in spirit that does not break away from the utility model and scope; Can utilize the method and the technology contents of above-mentioned announcement that the utility model technical scheme is made possible change and modification, therefore, every content that does not break away from the utility model technical scheme; To any simple modification, equivalent variations and modification that above embodiment did, all belong to the protection range of the utility model technical scheme according to the technical spirit of the utility model.
Claims (6)
1. an onboard system comprises digitally, simulates ground, communication module and is suitable for the PMU to said communication module power supply, and said PMU, communication module connect digitally said, it is characterized in that, also comprise:
Be suitable for the energy storage filter circuit that the power supply to the output of said PMU carries out filtering and energy storage, said energy storage filter circuit connects said PMU, communication module and digitally;
Be suitable for connecting said digitally with first magnetic bead on simulation ground.
2. onboard system according to claim 1; It is characterized in that; Also comprise: be suitable for providing power supply power circuit, be suitable for handling the audio-frequency power amplifier of the voicefrequency circuit of various audio signals, audio signal output to the loud speaker after being suitable for said voicefrequency circuit handled; Said PMU, audio-frequency power amplifier link to each other with said power circuit respectively; Said voicefrequency circuit is with said PMU, link to each other to said simulation, and the fin of said audio-frequency power amplifier and power circuit digitally link to each other with said respectively.
3. onboard system according to claim 1; It is characterized in that; Said energy storage filter circuit comprises second magnetic bead and first electric capacity; Said second magnetic bead is connected between said PMU and the communication module, said first electric capacity be connected in said second magnetic bead an end and said digitally between.
4. onboard system according to claim 3 is characterized in that, said energy storage filter circuit also comprises at least one and the parallelly connected electric capacity of said first electric capacity.
5. onboard system according to claim 3 is characterized in that, said energy storage filter circuit also comprises second electric capacity, said second electric capacity be connected in said second magnetic bead the other end and said digitally between.
6. onboard system according to claim 5 is characterized in that, said energy storage filter circuit also comprises at least one and the parallelly connected electric capacity of said second electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202471379U CN202183773U (en) | 2011-07-13 | 2011-07-13 | Vehicle-mounted system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011202471379U CN202183773U (en) | 2011-07-13 | 2011-07-13 | Vehicle-mounted system |
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| CN202183773U true CN202183773U (en) | 2012-04-04 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102882610A (en) * | 2011-07-13 | 2013-01-16 | 上海博泰悦臻电子设备制造有限公司 | Vehicle system and method for eliminating noise |
| CN108471572A (en) * | 2018-04-26 | 2018-08-31 | 珠海锐视保科技有限公司 | Novel on-vehicle system |
| CN108667480A (en) * | 2018-04-26 | 2018-10-16 | 珠海锐视保科技有限公司 | Onboard system |
| CN108683973A (en) * | 2018-04-26 | 2018-10-19 | 珠海锐视保科技有限公司 | Vehicle-mounted monitoring system |
| CN110544855A (en) * | 2018-05-29 | 2019-12-06 | 鸿富锦精密工业(武汉)有限公司 | power adapter and electronic device including the same |
| CN113721056A (en) * | 2021-09-06 | 2021-11-30 | 成都能通科技有限公司 | Extensible arbitrary waveform generator bottom plate |
-
2011
- 2011-07-13 CN CN2011202471379U patent/CN202183773U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102882610A (en) * | 2011-07-13 | 2013-01-16 | 上海博泰悦臻电子设备制造有限公司 | Vehicle system and method for eliminating noise |
| CN108471572A (en) * | 2018-04-26 | 2018-08-31 | 珠海锐视保科技有限公司 | Novel on-vehicle system |
| CN108667480A (en) * | 2018-04-26 | 2018-10-16 | 珠海锐视保科技有限公司 | Onboard system |
| CN108683973A (en) * | 2018-04-26 | 2018-10-19 | 珠海锐视保科技有限公司 | Vehicle-mounted monitoring system |
| CN110544855A (en) * | 2018-05-29 | 2019-12-06 | 鸿富锦精密工业(武汉)有限公司 | power adapter and electronic device including the same |
| CN113721056A (en) * | 2021-09-06 | 2021-11-30 | 成都能通科技有限公司 | Extensible arbitrary waveform generator bottom plate |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120404 |
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| CX01 | Expiry of patent term |